Journal articles on the topic 'Automobiles design and construction; automobile design; automobile construction'
To see the other types of publications on this topic, follow the link: Automobiles design and construction; automobile design; automobile construction.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Automobiles design and construction; automobile design; automobile construction.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Xu, Wan Hong, Guo Ying Wang, and Wen Xuan Ma. "Analysis and Construction of Automobile Steering Gear Model Library Based on CATIA." Advanced Materials Research 655-657 (January 2013): 1702–5. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1702.
Full textAbstract:
Automobile steering devices are key parts that change driving direction of automobiles and maintain them stable in a straight line. In order to construct steering gear model quickly and accurately, this paper does parameterized modeling to automobile steering gear through knowledge engineering module of CATIA software. By using Visual Basic can be interactive interface created, modeling can be recorded and modified procedure through the macro mode, and write program code, by using process of external access to realize secondary development of CATIA and complete construction of steering gear model library. Users input corresponding design parameter values that can automatically call parts model; therefore, it shortens product design cycle and improves design efficiency of product.
2
Wang, Jiaying, Shen Ye, Yongjin Xu, Lixin Wang, Jian Yuan, and Jinrong Wang. "Electric Vehicle Battery Power Estimation and Remote Monitoring Method Based on Optimization Algorithm." Journal of Physics: Conference Series 2310, no. 1 (October 1, 2022): 012011. http://dx.doi.org/10.1088/1742-6596/2310/1/012011.
Full textAbstract:
Abstract With the leap-forward development of China’s economy and society, people have put forward higher demands for travel convenience. As a daily means of transportation, automobiles have gradually approached thousands of households. Therefore, the automobile industry has also developed rapidly in recent years. The construction of digital factories for automobile manufacturing and production has rapidly promoted the progress of the new energy automobile industry. The main purpose of this paper is to study the battery power estimation and remote monitoring program of electric vehicles based on the optimization algorithm. This paper mainly selects the battery model, compares and analyzes different algorithms, and completes the database design and the construction of the relevant development environment according to the functional requirements and combined with the actual situation. Experiments show that low temperature has a great influence on the discharge capacity of the battery. The battery can release 74% of the rated capacity at -5°C, while the battery can release only 56% of the rated capacity at -20°C.
3
Wang, Wurong, Guanlong Chen, Zhonqin Lin, and Xinmin Lai. "Automated Hierarchical Assembly System Construction in Automobile Body Assembly Planning." Journal of Mechanical Design 127, no. 2 (March 1, 2005): 347–51. http://dx.doi.org/10.1115/1.1829724.
Full textAbstract:
DFA (design for assembly) is an approach to designing products with ease of assembly in mind. Multilayer assembly system construction and possible assembly sequencing are important information for DFA, especially at the prototype design stage of an automobile. This paper aims to help automobile designers construct a hierarchical assembly system, develop a systematic approach to automated subassembly detection, and assembly sequencing in automobile body assembly planning. Modeling of an automobile assembly is given, based on precedence knowledge among automobile parts. Algorithms to detect possible subassemblies with two-step verification and to generate all available sequences are also developed in this study.
4
Ramakrishnan, R., Somashekhar S. Hiremath, and M. Singaperumal. "Modeling, Simulation and Design Optimization of a Series Hydraulic Hybrid Vehicle." Applied Mechanics and Materials 541-542 (March 2014): 727–31. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.727.
Full textAbstract:
Crude oil resources in the world continue to diminish; automobile, agricultural machinery and construction machinery manufacturing companies are placing more emphasis on energy efficient series hydraulic hybrid systems which can replace their conventional transmission systems. Series hydraulic hybrid system is a mechatronics system with two source of power (that includes prime mover and hydro-pneumatic accumulator) which drives the vehicle. Even though, it has been proven as an energy efficient system, sizing of the components or sub-system for automobiles has got a major influence on energy efficiency of vehicle. In this paper, a power bond graph approach is used to model the dynamics of series hydraulic hybrid system and simulation results elucidate various modes of operations. It also shows the dynamic response of hydro-pneumatic accumulator, prime-mover and system output speed. Further, design optimization of system is carried out to optimize the physical /process parameters for the maximum system's output energy that, leads to increase in energy efficiency and environmental friendly vehicle.
5
Liu, Da Cheng. "Research and Design of Automobile Car Body CAD System under CADCAM Integration Environment." Applied Mechanics and Materials 443 (October 2013): 44–47. http://dx.doi.org/10.4028/www.scientific.net/amm.443.44.
Full textAbstract:
With the rapid development of computer technology, the processing ability of image simulation system is becoming stronger and stronger. The widely used AutoCAD (Computer Aided Design technology) in automobile car body drawing gradually extends to automation direction,and it can be more widely used.Realizing the informationization deepening in automobile car body drawing has a very important significance for the modernization construction of our country.Based on the analysis of advantages and disadvantages of AutoCAD technology,this paper puts forwards the application of reliable transmission technology in automobile car body drawing operation,designs automation model of automobile car body drawing system and introduces the information feedback of transport layer in this mechanism,so as to achieve the optimization of highly efficient application in automobile car body drawing system.
6
Weng, Ying Ying. "Design and Implementation of Automobile Industry Cluster Information Service System Based on GIS." Applied Mechanics and Materials 687-691 (November 2014): 1872–75. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.1872.
Full textAbstract:
According to the automobile industry cluster situation at present, the paper introduces the method and train of thought of automobile industry cluster based on GIS from demand analysis, data base design, function design and so on. Also demonstration analysis in one automobile industry cluster. In construction, use client layer, web layer, business logic layer and data layer to design the system architecture. It improved the system maintenance performance, used Oracle and ArcSDE to access space data and attribute data, and mass data storage management. Research results maybe give some significance reference for design and implementation of automobile industry cluster.
7
Underwood, Gerald T. "Highway Metrication: Approaching the General Public." Transportation Research Record: Journal of the Transportation Research Board 1552, no. 1 (January 1996): 103–6. http://dx.doi.org/10.1177/0361198196155200114.
Full textAbstract:
Commendable progress has been made in recent years in the application of metric dimensions and standards to the design and construction of U.S. road and highway systems and affected industries. The metrication experience of other U.S. industries has clearly shown that the rates of assimilation and adaptation to a change in measurement system correlate closely with the extent of technical background of those directly involved. In less than a decade and with very limited difficulty, the entire U.S. automobile industry changed to the use of the metric system throughout its vast network of design, manufacturing, and service organizations. Remarkably, that elaborate changeover yielded almost no public outcry because of the excellent strategy used by the industry. Use of the metric system was given a very low level of publicity because very few retail customers were affected. Beyond p-metric tire designations and mile-kilometer speed indications, few consumers were aware then, or are concerned today, that their automobiles, like all others worldwide, are manufactured entirely to metric dimensions and standards. A similar strategy is now being effectively pursued in that part of the construction industry responsible for major buildings. For all the same reasons and to the fullest extent possible, that strategy should be continued in the metrication of U.S. highway design, construction, and systems management.
8
Bol'shikh, A. A., D. S. Vdovin, and G. P. Eremin. "Calculation investigation of the strength of the composite wheel rim." Izvestiya MGTU MAMI 12, no. 1 (March 15, 2018): 2–9. http://dx.doi.org/10.17816/2074-0530-66814.
Full textAbstract:
The aim of the research is to reduce the unsprung mass, the moment of inertia of the racing automobile’s wheel while maintaining the necessary strength due to the using of composite materials in its construction. Currently, the composite materials have been obtained a widespread usage as structural materials in the automobile assemblies and units. Particularly, the using of modern composite materials in the transmission elements of the automobile, such as drive shafts, axle shafts or wheels, makes it possible to substantially improve the performances of the wheeled vehicle: reduce the full and the unsprung weight. It is possible to point out from the modern composite materials, the polymeric composite materials having carbon fibers as a reinforcing element, which are possessing a low density and the best combining a high level of specific strength with producibility of the products. The object of the research is the racing automobile’s wheel which belongs to the class of “Formula Student”. The usage of composite materials in the construction of similar wheels, as well as the estimated evaluation of the wheel’s strength during its manufacturing from composite materials are discussed. The regulations of the competitions permit a great freedom in choosing the wheel construction. The estimated strength evaluation was carried out by the finite element method, the original finite element wheel model was developed for this purpose taking into account the anisotropic properties of the reinforced materials. The computational investigation of the strength of the selected construction showed that the rim which is made of the composite material has an excessive safety factor at the design loads. The proposed constructive decision allows to reduce the wheel weight by 33% (up to 1.68 kg) in comparison with the one-piece wheel made of magnesium alloys (2.5 kg).
9
O. Ajala, M. "Construction of steel shed: a case study of automobile service center, bells university of technology, Sango-Ota, Ogun state, Nigeria." International Journal of Physical Research 9, no. 1 (February 2, 2021): 27. http://dx.doi.org/10.14419/ijpr.v9i1.31337.
Full textAbstract:
The construction of steel shed for Automobile Service Centre at the Bells University, Sango-Ota, Ogun State, Southwestern Nigeria was deemed necessary in order to expand the existing structure, ensure safety and bring economic gains to the Institution. This paper therefore presents a report of the construction of steel shed at the Automobile Service Centre where activities such as automobile checks, repairs and so on are been carried out. In carrying out the project, the following methods were adopted: evaluation of design/working drawings, selection and fabrication of structural members, construction work and finishing. All methods follow standard procedures as specified in relevant British standards. The assemblage and completed work were the results of the methods mentioned above and it was confirmed that the members were adequate to carry the live and dead loads that they may be subjected to. The aim of the project was achieved.
10
Arulmurugan, R. "Design and Fabrication of Load Carry Electrical Vehicle." Journal of Alternative and Renewable Energy Sources 8, no. 3 (November 22, 2022): 30–33. http://dx.doi.org/10.46610/joares.2022.v08i03.004.
Full textAbstract:
The main purpose of this project is to carry the five hundred to seven hundred load short distances. The problem identified is automobile vehicles used to transfer goods for short duration, everywhere. On the other hand, automobile fuel cost has increased abruptly. Due to rises in fuel cost, it is directly and indirectly affected by the cost of living. That means it directly raises all items' cost rise such as vegetable prices, construction materials, cosmetics, etc. On the other hand, automobile vehicles produce more pollutants in the environment. The main object of this paper is to design the fabrication of load-carry electrical vehicles. In the exciting electrical vehicle, auto-rickshaw cost is too high it cannot be afforded by average and below average people. The drawback of the exciting vehicle is the carriage covers 20% of the total load. In the proposed method design weightless carriage and more space as well comfort to carry the load on short as well long distances. The main merit of the proposed method are to reduce the 40% cost compared to the market price. The proposed fabrication 3D diagram and practical implementation as detailed in the following paragraph.
11
Zhang, Hao, Zhehua Zhang, Ping Zhang, Xinyan Wang, and Jun Jiang. "Improvement and Design of Road Construction Hoardings." Journal of Environmental Science Studies 5, no. 1 (May 11, 2022): 43. http://dx.doi.org/10.20849/jess.v5i1.1185.
Full textAbstract:
Today, with the improvement of social productivity, the quality of life of our residents has been unprecedentedly improved, but the problems of uncoordinated, insufficient and unsustainable development still exist, such as the environmental problems closely related to people's lives. In recent years, sandstorms, automobile exhaust, industrial and agricultural smoke and dust, construction dust and other haze caused by the haze, has seriously affected the normal life of the people, the normal production of society, the health of residents; among them, construction dust, is gradually becoming the leading factor leading to air quality pollution, but as long as the right measures, construction work construction. The first convenient installation, saving time for installation and later disassembly, the second convenient device disassembly and handling effect, at the same time sealing snap post and sealing snap slot snap, complete the sealing fit of the two wind protection plate, increase the sealing of the device, so as to improve the device wind protection effect and improve the overall practicality of the device.
12
Zheng, Xundong, Shanshan Yi, and Xiaotong Deng. "Evaluation model construction of automobile appearance design based on random forest algorithm." Journal of Physics: Conference Series 1941, no. 1 (June 1, 2021): 012072. http://dx.doi.org/10.1088/1742-6596/1941/1/012072.
Full text
13
Luan, Kun, Bao Zhong Sun, Bo Hong Gu, and Jia Jin Zhang. "Design of an Eco-Power Automobile Body Made from Green Composite and its Structural Optimization in FEA." Advanced Materials Research 287-290 (July 2011): 405–9. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.405.
Full textAbstract:
Ramie (Boehmeria nivea) is a kind of natural fiber that has good mechanical and environmental friendly properties. The fabric woven by ramie yarns shows excellent dimensional stability. Polypropylene (PP) was used as matrix for its recyclable and thermoplastic properties. PP is the widely used thermoplastics for composite and currently it is very common in building, construction, furniture and automotive products. Since the eco-power automobile body was designed for light-weight and low fuel consumption, there seems to be high potential application to automobile industry for ramie-PP composite. Therefore, in this paper, we developed a constitution of fabric to form stable structure reinforcement. The reinforcement and PP particles were treated in vulcanizer by thermo-compression technology. The fundamental mechanical properties of the composite were tested for finite element analysis (FEA). An eco-power automobile body was designed in Pro/E® Wildfire 5.0 and transferred to Finite Element Analysis Software for material and structural simulation analysis. Structural improvement and sizing optimization of the eco-power automobile body model were simulated to judge the material application and its structure effectiveness.
14
Toma, Eiji. "Study on surface modification of paper friction material by optimization design of clutch disk construction equipment for automobile AT." Journal of the Institute of Industrial Applications Engineers 6, no. 2 (April 25, 2018): 80–85. http://dx.doi.org/10.12792/jiiae.6.80.
Full text
15
Sherbina, Gennadii. "Design and Construction of Intra-block Automobile Communication Lines that Provide Traffic Safety." Transportation Research Procedia 20 (2017): 602–7. http://dx.doi.org/10.1016/j.trpro.2017.01.097.
Full text
16
Sariyal, Mr Saurav. "Design and Analysis of Natural Fiber Reinforced Epoxy Composites for Automobile Applications." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 3508–15. http://dx.doi.org/10.22214/ijraset.2021.35980.
Full textAbstract:
The need for eco-friendly materials is increasing in the automobile and aerospace sectors. Material selection for automobile components is influenced by various factors such as cost, weight and strength. Natural fibers offer various advantages over conventional materials such as environment friendly, easily available, recyclable and higher specific strength. Among the natural fibers Sisal and Kenaf fibers are selected for present study due to their good mechanical properties and availability. Kenaf fibers have great potential to be used as construction and automotive materials due to their long fibers which are derived from the bast. Sisal fibers do not absorb moisture and possess good impact, sound absorbing properties and high fire resistance properties. Epoxy LY556 is selected as matrix material to bind the combination of these two natural fibers due to its high temperature resistance and adherence to reinforcements. This project aim is to development of a new hybrid natural composite made of Sisal and Kenaf for automobile application. Static analysis of specimen will be perform utilizing in ANSYS 19 software to determine force reaction for specified displacement with both composite materials along with stress concentration effect with deformation. Results and end will be drawn by looking at systematic and experimental esteems.
17
Ravi Ghule and Simran Shaikh, Prof Nivedita, Pall Choudhury, Ashutosh Jagdale,. "A Review Paper on Electric Assisted Steering System for Automobiles." International Journal for Modern Trends in Science and Technology 7, no. 03 (April 10, 2021): 54–56. http://dx.doi.org/10.46501/ijmtst0703009.
Full textAbstract:
Electric Assisted Steering system is an Electric System, which reduces the amount of steering effort by directly applying the output from the electric motor to the steering system.In this system the mechanical link between the steering wheel and road wheels of an automobile are replaced by a control system consisting of sensors, actuators and controllers seem to offer great advantages such as enhanced system performance, simplified construction, design flexibility etc.It offers greater vehicle safety by adapting variable steering ratios to human needs, filtering drive train influences and even adjusting active steering torque in critical situations. In addition, it can make cars even lighter and more fuel efficient when compared to those using hydraulic steering systems. The central electronic elements of today’s steering systems are modern microcontrollers
18
Goptarev, Sergey, Andrey Manukovskiy, and Dmitriy Vostrikov. "GEOCRIOLOGICAL PROCESSES IN THE BULK OF AUTOMOBILE ROAD USING VOLUME GEOROGETS." Actual directions of scientific researches of the XXI century: theory and practice 8, no. 1 (October 26, 2020): 257–63. http://dx.doi.org/10.34220/2308-8877-2020-8-1-257-263.
Full textAbstract:
The article discusses the technological processes of the use of geogrids in the construction and repair of subgrade in areas with low air temperatures. The calculation of the overall stability of slopes or slopes closed by geogrids as applied to areas where erosion processes are widely developed is given. Accounting processes are usually carried out in the framework of work on individual design, with scientific support. Some general recommendations on the design of structures from geogrids and calculations of their interaction with disconnected soils during cryogenic processes are described. Thermal erosion processes most dynamically develop in the northern part of Western Siberia. Especially active is thermoerosion associated with the activities of temporary streams. On the territory of the Ural Federal District, during the construction, maintenance and repair of roads in a number of sections, slopes and embankment slope surfaces are strengthened to protect against erosion and thermoerosion processes using Geoveb technology with volumetric geogrids.
19
Kang, Zhen Zhen, Xiao Jun Li, and Cong Hong Liu. "Earthships-Scrap Tires Recycling in Building Design." Advanced Materials Research 250-253 (May 2011): 3338–44. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.3338.
Full textAbstract:
With rapid development in automobile industry and increasing environment problems, a difficulty confronting many countries is how to recycle scrape tires. The earthship comes out as an effective way to make full use of scrap tires in building design. By introducing its construction procedure, current conditions at home and abroad, and two case studies abroad, the paper concludes its advantages in environment protection, building performance, economy and technology. Besides, in view of the present condition in China, It suggests to first build earthships in less developed areas, or areas with extreme weather conditions, and try to popularize them in temporary structures, garden buildings, or special buildings.
20
Vdovin, D. S., V. S. Prokopov, and D. M. Ryabov. "Design of an independent vehicle suspension guide using the topological optimization method." Izvestiya MGTU MAMI 11, no. 3 (September 15, 2017): 9–13. http://dx.doi.org/10.17816/2074-0530-66824.
Full textAbstract:
Reducing the mass of automobile aggregates is an urgent task: fuel consumption and emissions to the atmosphere are reduced, material intensity, energy intensity, production costs are reduced, the ratio of the mass of the cargo to the curb weight of the vehicle is increased, etc. The solution of such a problem by the method of topological optimization makes it possible to obtain strong and rigid constructions of minimum mass. The article considers an example of reducing the mass of the chassis of vehicle by synthesizing the power scheme of double wishbones of an independent suspension of an all-wheel drive 4x4 automobile by topological optimization. The peculiarity of the design scheme is the use of a complex finite-element suspension model that allows the synthesis of the power circuit of the upper and lower arms simultaneously and the loading of the suspension is carried out as part of a common beam-rod independent suspension model and with a wheel. The power circuit of the upper arm obtained as a result of solving the optimization problem is a flat construction in the form of the letter A, which is explained by: 1) the absence of forces acting outside the plane of the upper arm of the suspension; 2) a small distance between the hinges of attaching the arm to the body. The power circuit of the lower arm of the suspension also has the shape of an isosceles triangle in plan, however one branch of the triangle has a large construction height in a direction perpendicular to the plane of the arm, which is explained by the high force created by the elastic suspension element resting in this zone on the lower arm. In the absence of forces emerging from the plane of the suspension arm, the task of synthesizing the power circuit is reduced to a flat problem and provides uniquely interpreted power circuits that are easy to implement in the construction of arms. When forces acting perpendicular to the plane of the arm, for example, in the zone of support of the spring-damping suspension element, are applied, it is necessary to increase the construction height of the arm in the zone of action of this force. The overall assessment of the weight of the resulting lever structures in comparison with existing analogs shows a reduction in the weight of the arms by up to 30%.
21
Churilin, V. S., S. V. Efimenko, V. N. Efimenko, A. V. Sukhorukov, and Yu V. Drozdov. "ESTIMATED PERFORMANCE STANDARDIZATION OF CLAYEY SOILS IN THE TOMSK REGION FOR THE QUALITY ASSURANCE IN ROAD CONSTRUCTION." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 22, no. 6 (December 29, 2020): 177–87. http://dx.doi.org/10.31675/1607-1859-2020-22-6-177-187.
Full textAbstract:
The paper indicates the need to develop a standard of organization with regard to the regional studies carried out by specialists from the Automobile Roads Department of Tomsk State University of Architecture and Building. The boundaries of the road-building climatic zones are clarified together with the road geocomplexes in the Tomsk region. A set of design values is recommended for clay soils to provide the qualitative design of nonrigid road pavements.
22
Geetha, S., M. Selvakumar, and S. Muthu Lakshmi. "Investigation on Properties of Reactive Powder Concrete with Automobile Grinding Steel Waste as Fine Aggregate." E3S Web of Conferences 309 (2021): 01216. http://dx.doi.org/10.1051/e3sconf/202130901216.
Full textAbstract:
High strength concrete is seldom used in normal construction practice due to its high cost and difficulties in achieving the desired design strength. This paper gives an insight on using waste material which has been disposed in lands as a sustainable construction material to replace sand and to achieve desired strength. The compressive strength of Reactive powder concrete (RPC) produced in this work was 88 MPa and the flexural strength was 20 MPa. Also the influence of different curing methods on the properties of RPC has been investigated. Durability studies also show that the material satisfies the durable parameters to be used as a construction material.
23
Kumar, Anil, Amit Pal, Ashwani Vohra, Sachin Gupta, Suryakant Manchanda, and Manoj Kumar Dash. "Construction of capital procurement decision making model to optimize supplier selection using Fuzzy Delphi and AHP-DEMATEL." Benchmarking: An International Journal 25, no. 5 (July 2, 2018): 1528–47. http://dx.doi.org/10.1108/bij-01-2017-0005.
Full textAbstract:
Purpose Supplier selection for capital procurement is a major strategic decision for any automobile company. The decision determines the success of the company and must be taken systematically with the utmost transparency. The purpose of this paper is to construct capital procurement decision-making model to optimize supplier selection in the Indian automobile industry. Design/methodology/approach To achieve the stated objective, a combined approach of fuzzy theory and AHP-DEMATEL is applied. Evaluation parameters are identified through an extensive literature review and criteria validation has been introduced through a Fuzzy Delphi method by using fuzzy linguistic scales to handle the vagueness of information. AHP is employed to find the priority weight of criteria, although an inter-relationship map among criteria is not possible through AHP alone since it considers all criteria as independent. To overcome this, DEMATEL is used to establish cause-effect relationships among criteria. Findings The results show that the total cost of ownership (TOC) is the first weighted criterion in supplier selection for capital procurement, followed by manufacturing flexibility and maintainability, then conformity with requirement. The cause-effect model shows that supplier profile, TOC, service support and conformity with requirement are in the cause group and are considered to be the most critical factors in selecting the supplier. Originality/value The study’s outcome can help the automobile industry to optimize their selection process in selecting their suppliers for capital procurement; the proposed model can provide guidelines and direction in this regard.
24
Cao, Yuhong, Jianxin You, Yongjiang Shi, and Wei Hu. "The obstacles of China’s intelligent automobile manufacturing industry development." Chinese Management Studies 14, no. 1 (January 2, 2020): 159–83. http://dx.doi.org/10.1108/cms-09-2017-0250.
Full textAbstract:
Purpose This paper aims to make a systematic study on the factors that hinder the development of China’s intelligent automobile manufacturing industry; based on comprehensive understanding of these obstacles and by optimization means, ultimately, the healthy and sustainable development of intelligent automobile manufacturing industry in China can be promoted. Design/methodology/approach Based on a questionnaire survey of intelligent automobile manufacturing listed companies in China, first, fuzzy semantic scale was adopted to collect respondents’ choices, the fuzzy score function is used to calculate the fuzzy score value and these data are used as the basis for subsequent model analysis. Then, structural equation modeling (SEM) was adopted to analyze the causal relationship between influencing factors to explore the main hinder factors. Findings It is found that, in the short term, the backwardness of technological industrialization is the main reason leading to low permeability of intelligent automobile; in the medium term, the imperfect industrial R&D ability and the insufficiency of infrastructure are major causes for high manufacturing cost and low competitiveness of intelligent automobile manufacturing industry; in the long term, the lack of national policy and industrial strategic planning is the main factors affect intelligent automobile manufacturing cost and the industry competitiveness. Practical implications The research conclusion has important policy implications for promoting intelligent automobile manufacturing sustainable development. In recent years, China’s intelligent automobile manufacturing industry has gradually stepped out of breeding period; therefore, the role of government should be gradually transformed from participants to managers and regulators. Considering the fact that intelligent automobile cost is very high, and still higher than the cost of fuel vehicle, government should focus on the issues such as improving R&D capabilities, infrastructure construction, policy framework system, legal system and technological industrialization. Specifically, in short-term planning, improving technological industrialization level is the key to development; in medium-term planning, policymakers should focus on the improvement of R&D capabilities and infrastructure; considering the long-term development, establishing appropriate national policies and dealing with the adverse impact of imperfect strategic planning are the most sensible choice. Originality/value This paper analyzes the factors that hinder the development of China’s intelligent automobile manufacturing industry for the first time, and provides the basic logic of integration factors at different levels with the development of intelligent automobile to reveal the uniqueness and facts of China’s economic development.
25
Bose, V. Chandra, V. Rajasimman, R. Gokul Prabu, and K. Har Govind. "Design and Manufacturing of Leaf and Coil Suspension." International Journal of Research in Engineering, Science and Management 3, no. 9 (September 17, 2020): 75–77. http://dx.doi.org/10.47607/ijresm.2020.291.
Full textAbstract:
The suspension system of an automobile separates the wheel/axle assembly from the body. The primary function of the suspension system is to isolate the vehicle structure from shocks and vibration due to irregularities of the road surface and to maintain contact with the surface thereby providing traction and control. Leaf spring is the preferred type of suspension system in almost all light and heavy commercial and transport vehicles. Leaf spring used in many vehicles due to having some main characteristics which are economical construction, uniformly distributed load, simple assembly in the vehicle and forgiving on use in rough terrain. In this paper we would like to take a look on the leaf spring, its design parameters and analysis. The paper is based on material selection, designing, experimental testing and load analysis etc.
26
Li, Cheng Lin, and Zhi Yong Jiang. "Design of Urban Vehicle Dynamic and Real-Time Navigation System Based on WSNs, GPS, and GPRS Techniques." Advanced Materials Research 765-767 (September 2013): 3291–94. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.3291.
Full textAbstract:
Currently, the traffic congestion is a significant problem encountered in urban development, which should be resolved depending primarily on the management and deployment under the circumstance that road construction isn't able to keep the pace of automobile growth. WSNs (Wireless sensor networks), made up of numerous sensor nodes, form a multi-hop and self-organizing cellular system by wireless communication, which can realize real-time monitoring and collecting environmental information by cooperation. In this paper, a design of real-time and dynamic city vehicle navigation system is presented based on WSNs, GPS(Global Positioning System), and GPRS(General Packet Radio Service) techniques..
27
Cui, Shuan Wei, Yi Liang Zhang, Shi Lei Zhao, and Cui Cui Wang. "Stress-Strain Monitoring and Assessment of Steel Beam in the Process of Column Demolition." Applied Mechanics and Materials 193-194 (August 2012): 643–46. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.643.
Full textAbstract:
Study on the construction monitoring was used to focusing on the Bridge and Tunnel. The construction of the steel structure workshop more and more appeared in the past few years, proper method of stress-strain monitoring of the key component while construction of steel structure workshop ,become particularly important factor to ensure the safety of construction process. Based on practical example of Jinbei automobile factory workshop, the paper describes the stress-strain monitoring of steel beam during column demolition. Through the design of test solution and the analysis of test data, get the suitable scheme of stress-strain monitoring, stress and strain field monitoring of the basic program, meeting the monitoring requirement whether steel beam is safe and reliable during column demolition, and could provide basis and support for similar conditions on-site monitoring.
28
Shohel, Shad Mohammad, Shaptarshi Sen Gupta, and Sabbir Hossain Riyad. "Weight optimization and finite element analysis of automobile leaf spring: A design construction referred to electric vehicle." IOP Conference Series: Materials Science and Engineering 1259, no. 1 (October 1, 2022): 012024. http://dx.doi.org/10.1088/1757-899x/1259/1/012024.
Full textAbstract:
Abstract In the current era, an automobile vehicle company’s major focus is now on conserving natural resources, reducing consumption of fuel, and reducing the weight of vehicle components. To reduce greenhouse gas emissions and fuel consumption and mitigate global warming, an electric vehicle will be a viable option. However, the EV’s main issue is the vehicle’s battery longevity. More power is necessary to drive a vehicle. The best solution to the issue is to reduce the vehicle component weight. Electric Vehicle suspension systems are another sector in which these developments are performed on a regular basis. Substantial steps are being taken to improve the vehicle ride quality. In this study, static and dynamic analysis has been carried out by finite element analysis at Ansys workbench and taken structural steel material for mono leaf spring. In composite material, carbon fiber and glass fiber have been considered as reinforcement and resin epoxy has been taken as matrix for mono leaf spring. The composite material fabrication has been accomplished layer by layer at Ansys ACP. After analysis, this study has revealed that by using composite material a magnificent amount of weight reduction has been achieved without sacrificing load-bearing capability, strength, and rigidity.
29
Esakov, A. E., A. V. Kretov, I. V. Potepun, and K. V. Balabanov. "Theoretical study of the static characteristics of automotive friction clutch as the automatic control facility." Izvestiya MGTU MAMI 10, no. 2 (June 15, 2016): 92–102. http://dx.doi.org/10.17816/2074-0530-66947.
Full textAbstract:
Reduction of costs related to automobile operation due to increase of their systems resource is the actual scientific and technical task that can be done in various ways. One of the ways is to use automatics which provide optimal operating modes. It is known that clutch friction pairs of self-propelled machines are less durable components of transmissions therefore above mentioned ideas are especially relevant for them. The disk friction clutch is a system whose state changes during operation due to wear disk pads. Considering it as one of the objects of automatic control of stepped mechanical transmission, it should be mentioned that the change in its state entails a change in the characteristics of work processes flow. If there is no means to address this change or to track and compensate it in automatic control system the algorithm used by system will gradually lose the adequacy to object, which will result the accelerated wear of pads and increase of costs related with both disc replacement and downtime of automobiles during repairs. The presence of clutch elements that have non-linear elastic characteristics in the design allows to assume that this process will have a non-trivial nature requiring to study regularities that in the future will assess their impact on the loading of friction pairs. In this paper, the construction and implementation of appropriate mathematical model solves first of these tasks in relation to the friction of single-disc dry clutch, where pressure is created by the split diaphragm spring with a direct installation.
30
Li, Yaping, Zheng Liu, and Shiqing Zhang. "Joint Impacts of Pricing Strategies and Persuasive Information on Habitual Automobile Commuters’ Travel Mode Shift Responses." Sustainability 15, no. 2 (January 6, 2023): 1058. http://dx.doi.org/10.3390/su15021058.
Full textAbstract:
Persuasive information developed by smartphone applications is a potential tool that can be utilized in order to increase the effectiveness of the impact of pricing strategies on triggering sustainable travel mode choice behavior. In order to address the joint impacts of pricing strategies and persuasive information on habitual automobile commuters’ travel mode shift responses, a stated-preference survey was conducted in Beijing’s inner district, from which over 1000 responses were collected. Four separate multivariable multilevel logistic regression models were estimated for more and less habitual automobile commuters when subjected to congestion pricing and reward strategies. The model estimation results showed that the influence of persuasive information was more effective in promoting travel mode shifts among more habitual automobile commuters with regard to reward strategies compared to congestion pricing. The results also showed that the impact of sociodemographic characteristics, commuter travel characteristics, the amount of congestion pricing or monetary award, and types of persuasive information on travel mode shift decisions under these strategies were deemed to be significantly different between more and less habitual automobile commuters. These findings suggest that more effective reward strategies can be explored by providing personalized and differentiated travel feedback information (e.g., pollution emission information and physical activity information), particularly for less habitual automobile commuters. This study also provides some degree of insight regarding the question as to how to design future congestion pricing, i.e., with respect to formulating differentiated charge rates according to the travel characteristics of habitual automobile commuters, as well as in developing complementary persuasive information that focuses on addressing public acceptability and fairness rather than travel feedback information.
31
Sun, Jin Kun, Shuang Hua Huang, and Yue Shui Lin. "Design and Application of 40m T- Beam Installation with Steel Trestle Bridge Made by Type- 64 Military Railway Girder." Advanced Materials Research 304 (July 2011): 101–6. http://dx.doi.org/10.4028/www.scientific.net/amr.304.101.
Full textAbstract:
In the case of installation of 40m pre-stressed reinforced concrete T-beam of Bridge A in a high energy-consuming industrial park, difficulties such as poor geology within bridge spans, too heavy T-beam and lack of conditions for installation of steel trestle bridge have been overcome. Finally, the problem of 40m T-beam installation has been resolved through reasonable design and by using type-64 military railway girder to make steel trestle bridge [1].Meanwhile, due to the restriction of terrain, T-beam is pre-cast on the base of lead road with 100m of corner radius, 97 meters away from the bridge. Through proper design of 60-ton track transport beam automobile to match the stress of the steel trestle bridge [2], the issue of transportation of T-beam have been successfully resolved, which has accelerated the construction progress of Bridge A, ensured the timely completion of construction, and greatly reduced the construction cost, which can provide beneficial references for design and installation of similar projects.
32
Ni, Jun, Wen Cheng Tang, and Yan Xing. "Computer-Aided Production Control of Automobile Injection Molds Based on Process Perception." Advanced Materials Research 655-657 (January 2013): 1682–86. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1682.
Full textAbstract:
This paper focuses on major issues in production process control of automobile injection molds based on process perception, such as manufacture resource perception, exchange in three-dimensional model (3D), production planning and scheduling, manufacture process planning (tool path and assembly sequence). After a survey of them, we propose a method for the construction of computer-aided production process control platform. 1) Define the networked manufacture semantic/data model and an encapsulating approach to efficiently manipulate manufacturing resources. 2) Develop structural multi-view data models for the design information of automobile molds transferring in 3D. 3) Propose a production planning and scheduling arithmetic. 4) Develop a variation accumulation model for manufacturing process control. 5) Integrate the tool path and assembly sequence planning of injection molds by using a variation accumulation model. 6) Integrate the existing and/or developed models to the new system. Finally we introduce a validation method and discuss the prospect to the accurate control of production process.
33
VOLKAN, Barış. "MODAL AND STRUCTURAL ANALYSIS STUDIES OF THE TRANSFER LINE CARRIER CONSTRUCTION." ICONTECH INTERNATIONAL JOURNAL 4, no. 1 (June 21, 2020): 33–43. http://dx.doi.org/10.46291/icontechvol4iss1pp33-43.
Full textAbstract:
In this study, the analysis studies carried out to assist the design stages of the part transfer line to be used in an automobile factory and the experiences gained from these analysis studies are emphasized. These experiences are very important in similar product developments in industrial design. Design and analysis studies carried out prior to manufacturing ensure that production can be carried out without any problems. For this reason, special importance should be given to the design stages in the process and alternative solutions should be created by revising the design in every aspect. Analysis studies should be carried out to select the best design among these solutions. The finite element approach, which is the approach used by today's special analysis software, was preferred in this study. Many analyses were carried out on the model whose boundary conditions were determined and the real-life behaviour of the design was foreseen. In the analysis studies, modal analyses and structural displacements were carried out in order to understand the dynamic behaviours and the stresses will not exceed certain limits. A finite element based simulation software was used in the analysis studies. Here, the importance of design experiences based on past experiences has emerged in the optimization of the design. The design steps to be presented in the paper and the analysis results obtained through the design were also very useful in the prototype manufacturing phase and the transfer line was safely demonstrated. As a result of the trials, the transfer line was delivered to the customer and still fulfils its duty safely.
34
Comer, Jonathan C., Nicholas J. Rose, and Leonard S. Bombom. "Poisson Regression Analysis of Highway Fatality Accident Data in Oklahoma." International Journal of Applied Geospatial Research 5, no. 4 (October 2014): 72–86. http://dx.doi.org/10.4018/ijagr.2014100105.
Full textAbstract:
Analysis of fatality automobile accident data can be challenging in rural areas where a relatively small number of such accidents occurs on specific sections of highways. Combining crash data from the Fatality Analysis Reporting System (FARS) and highway networks and design specifications from the Oklahoma Department of Transportation (ODOT), this article employs Poisson regression analysis to determine what roadway characteristics (e.g. grade, geometry, and design) are most associated with fatal accidents on predominantly rural segments of highways in Oklahoma. The results provide information about what combinations of highway design traits have contributed most to past crashes and therefore can identify potentially dangerous road segments system-wide. This information will help transportation engineers evaluate current construction practice and seek ways to address design issues that are shown to contribute significantly to serious crashes.
35
Bazhenov, E. E., S. K. Bujnachev, and A. N. Kustovskij. "Limits of applicability of the standard method for estimating the torsional rigidity of spatial frames of buggy vehicle." Izvestiya MGTU MAMI 12, no. 4 (December 15, 2018): 55–60. http://dx.doi.org/10.17816/2074-0530-66839.
Full textAbstract:
The article provides an assessment of the limits of applicability of the standard methodology for estimating the torsional rigidity of spatial rod-bearing systems of automobiles. Torsional stiffness, as shown by numerous studies and practices, is one of the most important indicators of the carrying capacity of vehicle bodies (frames) of all types of vehicles - including such highly specialized ones as buggy. The authors show on the example of the bearing structure of an off-road vehicle of the “buggy” class that the general application approach to the assessment of the torsional rigidity of the bearing systems using torsion deflection stumbles upon limitations when it comes to spatial frames of complex construction. These restrictions are dictated by the difference in stiffness between design zones (zones should be understood as the floor area, the waist area and the roof area), which is reflected in the significantly different distribution of displacements in them. As a result, it becomes impossible to unequivocally give an opinion on the torsional rigidity of the frame using torsion deflection, since it is impossible to select a reference point in any of the zones (or the entire zone) to adequately describe the torsional rigidity of the whole structure (or a separate substructure). In this regard, the authors proposed the limits of applicability of the traditional method for estimating the torsional stiffness of a spatial core structure, and also proposed a method for overcoming these difficulties encountered when trying to assess the torsional stiffness of the supporting structure. The object of the research is a typical spatial frame of an all-terrain automobile of the D2 class buggy.
36
Gopinathan, Nandan, and Prabhakar Karthikeyan Shanmugam. "Energy Anxiety in Decentralized Electricity Markets: A Critical Review on EV Models." Energies 15, no. 14 (July 19, 2022): 5230. http://dx.doi.org/10.3390/en15145230.
Full textAbstract:
The automobile sector is a promising avenue for enhancing energy security, economic opportunity, and air quality in India. Before penetrating a large number of electric vehicles (EV) into the power grid, a thorough investigation and assessment of significant parameters are required, as additional nonlinear and EV loads are linked to the decentralized market. Many automobile companies have already invested in electric vehicle research; hence, a detailed analysis on range anxiety and grid connectivity concerns are the important factors affecting the future of the electric vehicle industry. In this paper, the initial review is about the decentralized market in India and sustainable aspects of electric mobility based on the Indian context, as it is a developing nation with an enormous resource and scope for EV markets. With recent literature from the last three years, the substantial constraints observed in benefits and challenges are reviewed. The financial stability aspects and the incentives to overcome the barriers to EV adoption are briefly discussed. From the review, it has come to the limelight that infrastructure availability, technology, load demand, and consumer behaviour are all major obstacles in the electric vehicle ecosystem. For the overall design and study of the vehicle to grid (V2G) infrastructure, this paper also provides insight into the representation of electric vehicles in different energy-efficient models and their categorization while connecting to the grid. The methodology adopted for energy-efficient models includes lifecycle emissions, economy, smart charging, real-time optimization, aggregated EV resource modelling, and a support vector machine (SVM)-based method. This paper gives a positive impact on EV fleet integration and electric mobility in general, as it critically reviews the influential parameters and challenges. This classification depends on crucial parameters that are at the frontline of EV grid integration research. This review is a solution to enhance grid stability in regard to new EV models. With the advanced electric motors development and renewed battery technology models, longer-distance automobiles are now available on the market. This paper investigates the constraints of EV grid integration and analyzes different EV models to ease the grid stability for a decentralized market.
37
Kudryavtcev, S. A., and T. U. Valtseva. "STUDY OF THE INFLUENCE OF THE LAYING OF HEATING MAINS ON THE STATE OF THE BASE PAVEMENT AUTOMOBILE ROAD." Construction and Geotechnics 10, no. 2 (December 15, 2019): 30–39. http://dx.doi.org/10.15593/2224-9826/2019.4.03.
Full textAbstract:
This article includes the way to prevent deformation of linear constructions which can due to the laying of the heating network because heating promotes ice formation. The considered design of the pavement cover during the laying of the heating network is being built on a section of the road on Pionerskaya street, which belongs to the roads of the third category. There are results of scientific research and engineering calculations of options for rational design of roads when laying the heating network and the example of the Far Eastern section of the road. The development is a generalization of the results of solving engineering, scientific, and settlement applied objectives. There is heating network is being laid, in the area under considerationwhich will subsequently warm up the outer surface of the asphalt concrete due to the heat generation of the pipes. It will cause the formation of ice on the outer surface of the asphalt concrete during period with negative temperatures. This construction imitaties plate in the rubble layers by using an integrated biaxial geogrid, as well as the laying of the heat insulation layer. The analysis of the initial data, as well as during the realization of the work, has established that, in order to be able to evaluate and compare the various indicators, it is necessary to provide calculated and theoretical studies for several construction options. Analysis of possible methods and means for determining rational structure parameters showed that it would be advisable to use geotechnical software systems «FEM models» and «Termoground». These software systems are able to jointly simulate the work of structures by its stress state, as well as by the ongoing thermodynamic processes in the annual freeze-thaw cycle. Numerical simulation of the structure operation using this software geotechnical complex allowed us to estimate the stability of the structure deformations, as well as to limit the heating of the asphalt concrete surface.
38
Krishnamoorthy, A., and R. Karthik. "Study of Composite Helical Spring Using Glass Fibre with Araldite LY556 and XY54." Applied Mechanics and Materials 766-767 (June 2015): 523–27. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.523.
Full textAbstract:
This paper titled “Study of composite helical spring using glass fibre with Araldite LY556 and XY54”. Currently, the composite materials in the automobile sector are used for construction of the body, interiors, chassis, hoods, electrical components etc...these components are in simplest form and also they are regular in shape and easy to manufacture. However the design of suspension system and complicated structures in the automobile are quite difficult to bring out the same shape and performance. The most important no gap of steel springs suspension are limited corrosion resistance, long-lasting manufacturing process and weight. This paper brings out incredibly a simple method to prepare the composite helical spring for any dynamic application. The glass fibre and resin mixed with 70:30 ratio and it is tested by compression testing machine as per ASTM. The mechanical properties, such as maximum load carrying capacity, deflection, stiffness Youngs’modulus, Shear stress and strain energy are determined using compression testing machine. The objective of this study is to reduce the weight of the spring, to obtain good surface finish, similar to steel spring, novel manufacturing methodology and identification of failure point rather than the maximum load.
39
Adhikari, Kishalay, and Rajeev Kumar Panda. "Evaluation of brand relationship quality using formative index: a novel measurement approach." Journal of Product & Brand Management 29, no. 4 (November 18, 2019): 505–16. http://dx.doi.org/10.1108/jpbm-09-2018-2030.
Full textAbstract:
Purpose This paper aims to develop a parsimonious and robust formative index for evaluating and measuring the brand relationship quality of automobile brands. Design/methodology/approach Survey questionnaires were used to collect empirical data from 395 car owners, out of which 362 samples were included in the final analysis. Partial least squares technique was used for index construction. Findings The empirical findings exhibit that the automobile brand relationship quality (ABRQ) index based on the final set of six indicators effectively captures the conceptual domain of brand relationship quality. In addition, the external validity check affirms positive and significant influence of ABRQ index toward enhancing customer loyalty. Practical implications ABRQ index can assist the brand managers and academicians for benchmarking and market strategy formulation while contributing to the limited literature on brand relationship quality. Also, this index having six-indicators can considerably reduce the time and effort of respondents for filling the questionnaires, in turn, improving response rates. Originality/value This study represents a novel attempt to formulate a brand relationship quality index using formative measurement indicators, and as per the authors’ knowledge, has not been attempted by prior researchers in this domain.
40
Dhobale, Aditya. "Challenges Faced While Designing Body in White." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 49–56. http://dx.doi.org/10.22214/ijraset.2021.37916.
Full textAbstract:
Abstract: Construction of Body in White (BiW) revolves around plenty of challenges. Ranging from BiW fixtures to curbing weight of Body in White sheet metal design. This paper discusses about all the design aspects in BiW manufacturing in automobile and confronting challenges that occurs. At present, lots of existing theories are being applied and efforts to improve the same are being made. This paper provides a path on how components can be developed and make necessary improvements. CAE (Computer Aided Engineering) tools have been used for FEA (Finite Element Analysis) and also an example of stress analysis of automotive chassis is given. An outcome depending on behaviour of loads acting on frame is drawn. The importance of hollow tubes, tubes of different- cross sections to counter weight and ease the designing of BiW frame have been proposed. This paper also provides insight on safety parameters with current construction of tubular frame chassis. Other solutions such as hybrid tubes, foam padding and plastic trim have been pointed out in this paper. Keywords: CAE, FEA, manufacturing, loads, tubes, cycle-time, cross-section.
41
Petrov, L., O. Lysy, V. Nikishin, and I. Kishyanus. "MODERNIZATION ELEMENTS RESEARCH OF CYLINDER PISTON GROUP OF INTERNAL COMBUSTION ENGINEANNOTATION." Collection of scientific works of Odesa Military Academy 1, no. 12 (December 27, 2019): 133–40. http://dx.doi.org/10.37129/2313-7509.2019.12.1.133-140.
Full textAbstract:
Actuality. Meaning of efficiency coefficient of internal combustion engine fully depends on type and construction. Common world practice of automobile construction is directed on increasing of quality of indicators of usage of internal combustion engine, which is linked to directions of increasing efficiency. Leading overseas firms that “dictate” the engineering direction of the design improvement of internal combustion engines in connection with the improvement of the technology of processing fuel into mechanical work in the engine use various technological opportunities in conjunction with the design developments in the cylindrical piston group. That’s why modernization elements research of cylinder piston group is relevant. Goal. Research possible ways to increase efficiency internal combustion engine by modernization of cylinder piston group due to the scientific work plan. Task. Design measures for internal combustion engine modernization for increasing of quality of its usage. Research methodology. Due to methodology [2] we performed theoretical calculations of efficiency of real engine and efficiency of engine which cylinder piston group was upgraded. While we defied indicating efficiency of patrol engine ZMZ-406 we used auxiliary equation of B. Stechkin. We performed theoretical calculations of functional dependence of efficiency because of working body parameters changes simultaneously.
42
Evstifeev, A. A. "The System Analysis of Decision Support in the Development of a Network of Gas Filling Stations." Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta 27, no. 2 (2021): 203–11. http://dx.doi.org/10.17277/vestnik.2021.02.pp.203-211.
Full textAbstract:
The article describes the elements of the project for the development of software tools for automating decision support processes when planning measures for the development of a regional network of automobile gas filling compressor stations: diagrams of the design and construction of gas filling stations; the problem of finding places for the rational placement of gas filling stations according to the criteria of process (industrial equipment parameters), structure, cost and topology optimality. The functional diagram contains a description of all information flows and control flows. A variant of the solution of the problem of placing objects of transportation with natural gas, using an algorithm of directed enumeration of variants of solutions, is proposed.
43
Hudaykulov, Rashidbek, Dilfuza Makhmudova, Dilshod Kayumov, and Olmos Zafarov. "Filter leaching of salt soils of automobile roads." E3S Web of Conferences 264 (2021): 02032. http://dx.doi.org/10.1051/e3sconf/202126402032.
Full textAbstract:
Globally, in arid regions, due to the irrational use of water resources for irrigating plants, salinization of soils occurs, which causes significant damage to the country's economy. In particular, recently in some regions of Uzbekistan, there has been a rise in groundwater and flooding of territories. In these areas, where the soil bases of highways contain such readily soluble salts as: NaCL, Na2SO4·10H2O, MgSO4·7H2O, MgCL2·6H2O, CaCL2·6H2O, NaHCO3, Na2CO3·10H2O, CaCO3 and CaSO4·2H2O, additional suffusion precipitation is often observed which lead to deformations of road surfaces. Additional precipitation is due to the dissolution of salt crystals upon ingress of moisture during filtration leaching. Filtration leaching of soils was carried out in the F-1M device according to the upward flow pattern. To determine the amount of leached salts during the experiment, the infiltrate was taken, its volume and mineralization were recorded. At the end of the tests, the soil was tested according to the general scheme. To assess the influence of the leaching process on the strength indices of the studied soils by the methods of consolidated and fast shear, tests of pre-leached samples were performed. When testing soils, samples were cut, pre-compacted with the same specified load, and leached for a month. In laboratory conditions, the deformation modulus was determined by performing compression experiments. In connection with a sharp change in the modulus of deformation of soils during moistening, the tests were carried out at two values of humidity: at natural and after water saturation without the possibility of swelling. The study results show that the deformation modulus of water-saturated loams satisfactorily correlates with the value of the initial porosity coefficient and decreases as a result of water saturation and leaching. The degree of decrease depends on the value of the initial deformation modulus: the higher it is, the more significant its change. The value of the coefficient of weakening of the soil structure depends on the effective average pressure. The criterion for the permissible salt content in the base of the roadbed of highways should be taken not only the value of the degree of salinity but also the change in the indicators of the mechanical properties of soils used in the design of the construction of the roadway during soaking and leaching.
44
Wang, Jiaojiao, Fenli Chen, Weihong Wang, and Libao Dou. "Research on Ecological Corridor Planning of Lanzhou Yuzhong Ecological Innovation City from the Perspective of Ecological Civilization." Frontiers Research of Architecture and Engineering 4, no. 2 (November 29, 2021): 21. http://dx.doi.org/10.30564/frae.v4i2.3456.
Full textAbstract:
The practice and research of ecological civilization is a focus of current planning and design, as well as a scientific strategy under the current situation of resource constraint, environmental degradation and ecosystem degradation. Urban elements such as buildings, green land, farmland,water systems and mountains can be connected by ecological corridors into a green ecological system design.At present, many ecological and environmental problems, such as urban heat island effect, fog and haze, automobile exhaust have a negative effect on the construction of social ecological environment. In order to build a new modern city with prosperous economy, beautiful environment and social civilization, scientific and efficient ecological corridors should be designed to improve the environmental quality of the eco-city, and promote the construction and development of ecological civilization and green cities. Based on the relevant research and specific practices of ecological corridors at home and abroad,combine the needs of the planning and construction of the Yuzhong Ecological Innovation City, and discuss on the connotation and characteristics of ecological corridors, and discuss the key elements of ecological corridor planning.This article will take the ecological corridor planning of Yuzhong Eco Innovation City as an example. We design ecological corridor based on field investigation, literature and geographic information system..The planning and design of the ecological corridor in the planning area proposed in this paper can provide positive suggestion on the planning and design of the ecological corridor in other ecological innovation cities.
45
Chen, Xiang, Yuquan Zhang, Pei Jia, Zhaowen Lv, and Rulin Ma. "Research on light weight of thin-walled beam for automobile body." E3S Web of Conferences 268 (2021): 01057. http://dx.doi.org/10.1051/e3sconf/202126801057.
Full textAbstract:
The developing trend of the light-weight car is the using of new light-weight materials and the optimization of the car body structure. The beam construction is the major bearing part of the car body. The thin–walled beam of the light-material plays a significant role in lightening the car' own weight, saving the materials, reducing fuel consumption and air pollution. Firstly, the relationship between the thin-walled beam that is fixed in both points and the attribute of the material can be infered from the stiffness coefficient which used as the quantitative index to estimate materials. Then take the body-in-white produced by domestic car factory as an object of study, and use Cu or Al or Mg as the materials of the thin-walled beam to calculate the bending rigidity and torsional stiffness of thewhole car body by using the FEM simulation conducted in HyperMesh.The results show that under the condition of bending and torsion, the SME value is lower when the lighten materials such as Al or Cu are used as the bodywork of the thin-walled beam than steel is. Lighten material can greatly reduce the weight of the vehicle. But it also decreased the bending and torsional stiffness of the bodywork. Therefore, in order to avoid decreasing mechanical properties which caused by adopting lighten materials, we must consider the structural design of the thin-walled beam when adopt material for lightweight.
46
Ma, Cong Cheng, and Feng Chong Lan. "Review the Research Trends and Application in Car Body of Aluminum Foam." Applied Mechanics and Materials 729 (January 2015): 73–78. http://dx.doi.org/10.4028/www.scientific.net/amm.729.73.
Full textAbstract:
Aluminum foam has been widely used in aviation and spaceflight, ships, cars, transportation, construction, petrochemicals, telecommunications, etc. For decades, scholars have done a lot of research work. Mature and stable production preparation process of aluminum foams has been possessed. At present, the practical application design and production has becomes a hot issue. Based on analysis a flood of literature, aluminum foams owned mechanical properties and application, property evolution after filling thin wall tube; all were inductive research and reviewed in the paper. Moreover, material structure design factor, experimental comparisons, application in the automobile industry, development situation, as well forecasted its market prospect, all this were summarized. Suggestions on aluminum foam applications in the automotive industry had been proposed. Consequently, promote the process of the research efforts on the application of aluminum foam in the car, provide to designer and research worker with reference.
47
Al Habis, Nuha, Muna Khushaim, and Saja M. Nabat Al-Ajrash. "Energy Harvesting and Storage Devices through Intelligent Flexographic Technology: A Review Article." Energies 16, no. 2 (January 12, 2023): 869. http://dx.doi.org/10.3390/en16020869.
Full textAbstract:
Smart and mechanically flexible energy harvesting/storage devices are attractive for the immensely growing electronic, automobile, medical, and aerospace markets. The leading challenges with current devices are their limitations regarding installation on curvy design, high-manufacturing cost, and lower production rate. Therefore, new design strategies in terms of new materials, cost, and ability to scale up fabrication are imperative to meet the contemporary and future demands of these fast-growing markets. Flexographic printing is one of the newest technologies that promises cost-effective energy devices with better energy harvesting and high storage performance. Current knowledge, selection of suitable materials, and methods of flexographic printing for solar cell and battery construction are reviewed and summarized in this paper in comparison to existing printing technologies. The main purpose of this review is to provide a comprehensive idea of flexographic printing for energy devices.
48
Singh, Ravinder, Archana Khurana, and Sunil Kumar. "Optimized 3D laser point cloud reconstruction by gradient descent technique." Industrial Robot: the international journal of robotics research and application 47, no. 3 (February 15, 2020): 409–21. http://dx.doi.org/10.1108/ir-12-2019-0244.
Full textAbstract:
Purpose This study aims to develop an optimized 3D laser point reconstruction using Descent Gradient algorithm. Precise and accurate reconstruction of 3D laser point cloud of the complex environment/object is a key solution for many industries such as construction, gaming, automobiles, aerial navigation, architecture and automation. A 2D laser scanner along with a servo motor/pan tilt/inertial measurement unit is used for generating 3D point cloud (either environment/object or both) by acquiring the real-time data from sensors. However, while generating the 3D laser point cloud, various problems related to time synchronization problem between laser and servomotor and torque variation in servomotors arise, which causes misalignment in stacking the 2D laser scan for generating the 3D point cloud of the environment. Because of the misalignment in stacking, the 2D laser scan corresponding to the erroneous angular and position information by the servomotor and the 3D laser point cloud become distorted in terms of inconsistency for measuring the dimension of the objects. Design/methodology/approach This paper addresses a modified 3D laser system assembled from a 2D laser scanner coupled with a servomotor (dynamixel motor) for developing an efficient 3D laser point cloud with the implementation of an optimization technique: descent gradient filter (DGT). The proposed approach reduces the cost function (error) in the angular and position coordinates of the servo motor caused because of torque variation and time synchronization, which resulted in enhancing the accuracy in 3D point cloud mapping for the accurate measurement of the object’s dimensions. Findings Various real-world experiments are performed with the proposed DGT filter linked with laser scanner and servomotor and an improvement of 6.5 per cent in measuring the accurate dimension of object is obtained while comparing with conventional approaches for generating a 3D laser point cloud. Originality/value This proposed technique may be applicable for various industrial applications that are based on robotics arms (such as painting, welding and cutting) in the automobile industry, the optimized measurement of object, efficient mobile robot navigation, precise 3D reconstruction of environment/object in construction, architecture applications, airborne applications and aerial navigation.
49
Mirzahossein, Hamid, Amir Abbas Rassafi, Zahra Jamali, Robert Guzik, Alessandro Severino, and Fabio Arena. "Active Transport Network Design Based on Transit-Oriented Development and Complete Street Approach: Finding the Potential in Qazvin." Infrastructures 7, no. 2 (February 16, 2022): 23. http://dx.doi.org/10.3390/infrastructures7020023.
Full textAbstract:
Today, automobile dependency constantly causes traffic congestion, delays, reduced access, increased fuel and energy consumption, and environmental emissions. Automobile dependency has caused many direct and indirect transportation problems that may influence our life. Urban planners and transportation engineers seek to improve transport networks considering social issues. One of the most successful solutions for advocating sustainable transport is transit-oriented development (TOD). Another solution that planners encourage to use is designing the roadways based on a complete street approach, which is a system that provides safe, convenient, and comfortable travel and increases accessibility for users of all ages regardless of their transport modes. The present study employed the saturated roads that have heavy traffic most of the time and public transport e-ticket data to investigate the potential complete streets in Qazvin. An online questionnaire was developed using the Analytic Hierarchy Process (AHP) method based on the TOD and the complete street framework to investigate the essential criteria for redesigning the network based on the active transport approach. Thus, after analyzing the six criteria (density, diversity, distance, accessibility, demand management, and design) and eight sub-criteria (pedestrian flow, pedestrian density, connectivity, safety, bike route, bus route, road width, and urban tree canopy index), the proposed active transport network emerged and results show that five high priority streets were identified to be considered as a solution.
50
Jeong, Changyoon, Sang-Ha Hwang, Byeong-Joo Kim, Han Gi Chae, and Young-Bin Park. "Multilayered Composites with Modulus Gradient for Enhanced Pressure—Temperature Sensing Performance." Sensors 21, no. 14 (July 12, 2021): 4752. http://dx.doi.org/10.3390/s21144752.
Full textAbstract:
Highly sensitive and flexible composite sensors with pressure and temperature sensing abilities are of great importance in human motion monitoring, robotic skins, and automobile seats when checking the boarding status. Several studies have been conducted to improve the temperature-pressure sensitivity; however, they require a complex fabrication process for micro-nanostructures, which are material-dependent. Therefore, there is a need to develop the structural designs to improve the sensing abilities. Herein, we demonstrate a flexible composite with an enhanced pressure and temperature sensing performance. Its structural design consists of a multilayered composite construction with an elastic modulus gradient. Controlled stress concentration and distribution induced by a micropatterned structure between the layers improves its pressure and temperature sensing performance. The proposed composite sensor can monitor a wide range of pressure and temperature stimuli and also has potential applications as an automotive seat sensor for simultaneous human temperature detection and occupant weight sensing.