Готові списки джерел за темами / Automobiles Radiators Design and construction

Добірка наукової літератури з теми "Automobiles Radiators Design and construction"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Automobiles Radiators Design and construction"

Didmanidze, O. N., R. T. Khakimov, E. P. Parlyuk, and N. A. Bol’shakov. "Test Results of a Polymer Radiator of MTZ-80 Tractor Cooling System." Agricultural Machinery and Technologies 14, no. 1 (March 24, 2020): 55–60. http://dx.doi.org/10.22314/2073-7599-2020-14-1-55-60.

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Global car manufacturers wish to increase the number of manufactured products, reduce their cost and labor input. The choice of research areas, design and technological developments in radiator construction is an extremely important and urgent task, due to the mass production of radiators for tractors and automobiles on the one hand, and the favorable development prospects of these interrelated industries, on the other. (Research purpose) To substantiate theoretically and experimentally the use of a combined cooling system containing both aluminum and polymeric water radiators and similarly liquid-oil heat exchangers based on the four principles listed above on automobiles and tractors. (Materials and methods) The authors performed bench tests using a special wind tunnel to study the thermal and aerodynamic characteristics of a prototype tractor radiator with a polyurethane core. After reaching the steady-state operating mode of the installation, the experimental values were determined for the control and measuring instruments. (Results and discussion) The authors carried out measurements of all parameters of both coolants in series at each steady-state operating mode of the bench. They obtained the main indicators dependences (reduced heat transfer, aerodynamic and hydraulic drag) of the heat exchanger, close to the operating conditions of the vehicles. (Conclusions) A prototype MTZ-80 radiator with a polyurethane core has great prospects as a future alternative radiator. An increase by 10-15 percent in the radiator heat transfer is possible by using aluminum fi ns on the surface of the polyurethane plate. A 15-20 percent reduction in hydrodynamic resistance is achieved by increasing the diameter of the capillary throughput in a polyurethane plate and the number of plates themselves in the radiator cell.

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Myhren, Jonn Are, and Sture Holmberg. "Design considerations with ventilation-radiators: Comparisons to traditional two-panel radiators." Energy and Buildings 41, no. 1 (January 2009): 92–100. http://dx.doi.org/10.1016/j.enbuild.2008.07.014.

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Kara, Levent Burak, and Kenji Shimada. "Supporting Early Styling Design of Automobiles Using Sketch-based 3D Shape Construction." Computer-Aided Design and Applications 5, no. 6 (January 2008): 867–76. http://dx.doi.org/10.3722/cadaps.2008.867-876.

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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.

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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.

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Justin Dhiraviam, F., V. Naveen Prabhu, T. Suresh, and C. Selva Senthil Prabhu. "Improved Efficiency in Engine Cooling System by Repositioning of Turbo Inter Cooler." Applied Mechanics and Materials 787 (August 2015): 792–96. http://dx.doi.org/10.4028/www.scientific.net/amm.787.792.

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Turbochargers are an integral part of today’s modern diesel engines and are a major reason that they are able to produce more power. Unlike a super charger that is driven via a belt from the engine, a turbo takes the exhaust that the engine is producing and puts it to good use. As Turbochargers are driven by exhaust, heat is an unwelcome by product and something that wasn’t really taken into account in automobiles. Then those intercoolers started to come into play in turbocharged automobiles. The forced air produced by the turbocharger is routed through the intercooler where its temperature is reduced before reaching the engine. The use of intercoolers has made turbocharged vehicles far more reliable and, in the case of today’s heavy duty diesel trucks, is a very important component. The inlet air of an IC engine from turbocharger temperature is very much high (due to compression) means oxygen content is very much less. And also air with high temperature causes pre-ignition and detonation. So fuel combustion does not take place properly. Inter Cooling of inlet air is very much essential according to performance point of view. Turbo intercoolers are used for cooling the inlet air of an IC engine from turbo chargers. Moreover cooling of air makes it denser and contributes for better combustion and more power they are mounted close to the radiators for achieving lower air temperature. This arrangement affects the performance of both. So in this project an attempt will be made to increase the efficiency of the turbo intercooler arrangement through design modification and repositioning of intercooler by taking the TATA MARCOPOLO-Star Bus 909 as a reference.

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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.

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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

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Ma, Yiteng, and M. Zaheeruddin. "Dynamic modeling, adaptive control and energy performance simulation of a hybrid hydronic space heating system." Building Services Engineering Research and Technology 39, no. 4 (December 20, 2017): 406–29. http://dx.doi.org/10.1177/0143624417749454.

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A dynamic model of a hybrid hydronic heating system has been developed. The overall model consists of a boiler, a heat exchanger, a ground loop heat pump, a ground loop heat exchanger, baseboard heaters (convector–radiators), and radiant floor hydraulic piping system. Two control strategies for improving the overall system performance were explored: (1) a conventional proportional-integral (PI) control and (2) an adaptive gain control. The simulation results showed that the performance of the adaptive controller is better than the fixed gain PI controller in disturbance rejection and stability. Energy simulations under three different operating strategies were conducted: (1) a fixed set-point PI control, (2) an outdoor air temperature reset control, and (3) an optimal set-point adaptive PI control. It was shown that the outdoor temperature reset strategy can save 4.5 and 19.9% energy under cold day and mild day conditions compared to the fixed set-point PI control strategy. The optimal adaptive PI control strategy resulted in higher energy savings of 6.6 and 22% as compared to the PI control under cold and mild day conditions, respectively. Practical application: Energy efficiency and sustainability are a major issue of importance in the design and operation of space heating systems. The proposed hybrid system combines a ground-source heat pump and a hot water boiler for space heating of both residential and commercial building applications. The heating system consists of radiant floor piping for the residential zones and hot water baseboard heaters (convector–radiators) for the commercial zones. An energy optimal adaptive control strategy is designed to improve energy efficiency and temperature control performance of the hybrid system. The control strategy is simple and can be implemented on the existing building control systems.

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Hou, Wenbin, Xianzhe Xu, Xiao Han, Haifeng Wang, and Liyong Tong. "Multi-objective and multi-constraint design optimization for hat-shaped composite T-joints in automobiles." Thin-Walled Structures 143 (October 2019): 106232. http://dx.doi.org/10.1016/j.tws.2019.106232.

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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.

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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.

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Sa’adu, L., Y. Yusuf, I. Abdullahi, S. B. Muhammad, and A. B. Isah. "Design and Implementation of Buck Converter for Electric Vehicle’s Appliances." International Journal of Science for Global Sustainability 8, no. 4 (December 30, 2022): 9. http://dx.doi.org/10.57233/ijsgs.v8i4.369.

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Buck converter is a unidirectional DC-DC power converter that primarily steps down potential difference (PD) of the power bank of batteries or supercapacitors. Electric vehicles usually operate on higher voltage ranging from 45 to 72 volts. However, the electrical accessories of automobiles such as horns, trafficators, radio/players and brake or parking lights were designed to operate on 12 V DC voltage. This necessitates the use of buck converter for stepping down the voltage values to 12 volts. Nonetheless, replacing the converter when the need arises is indeed financially challenging, thus, in such a situation, the vehicles are mostly operated during the day time. Herein, we designed a buck converter using Proteus software and then constructed it with the aim of stepping down the voltage values to 12 volts at a reduced price. The design materials and the construction components used are readily available in most of the electronics shops. An outstanding performance was achieved and results indicated that the designed converter is suitable for use in electric vehicles.

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Дисертації з теми "Automobiles Radiators Design and construction"

Staples, Judd W. "Optimizing the allocation of resources during preliminary automobile design." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17975.

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de, Vos Neil. "Design of a new protective isolating side-door : a virtual model to simulate ingress and egress motion for micro-mobility vehicles." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2468.

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Thesis (MTech (Industrial Design))--Cape Peninsula University of Technology, 2016.
This paper is positioned within the broader context of public transportation systems, with specific focus on the development of urban micro first and last mile mobility solutions, and what it could mean for individuals and the economy. Globally, urban problems such as traffic congestion, poor public transport integration, and carbon emissions are forcing us to rethink traditional means of transport. Large fossil-fuelled vehicles and limited public transport infrastructure characterize South Africa’s transport market. Despite the growth in car use, public transport and walking are still the predominant “lifeline” forms of mobility for the vast majority of South Africans in order to access work, schools and services. Moreover, the lack of public transport services in key economic corridors and rural areas of South Africa, the role of the metered taxi industry which is currently effectively limited to serving only the needs of the tourist market due to high charging regimes, and finally, the absence of an effective inner city transport system endorses the lack of first and last mile transportation solutions, and the integration thereof with other transport mediums. This adds to the conflict commuter’s face on a daily basis in obtaining a seamless distribution of transport services. 80% of trips in urban areas are less than 3km, placing urban micro mobility vehicles in an ideal position as a solution to transportation. This describes the investigation conducted into micro-mobility trends within South Africa to identify a key mode of transport that would comply with the stated requirements, and allow accessibility to commuters within the city and to the surrounding communities. In 2014, Mellowcabs, which are electric public transport vehicles that provide first and last mile transport services, was identified as a promising candidate within the local micro-mobility vehicle context. They were in need of a design input for their immediate next requirement, which thus describes the development of a good protective side door system that would isolate passengers in adverse weather conditions, whilst similarly affording comfort and safety features found in normal passenger vehicles. The design process is focused on creating a new side door, however, at the same time the product should be, elegant, smart, fashionable, comfortable, economical, maneuverable and safe. In addition, the virtual product lifecycle management tool, CATIA, allows the design team to get feedback in terms of physical-based data that correspond to how the door could hinder the passengers interaction while they ingress and egress the vehicle. This enables us to try various designs to perform a comparative study without building a single physical prototype.

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Zhu, Min. "Design of automotive joints : using optimization to translate performance criteria to physical design parameters /." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-165515/.

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Zhao, Gui Quan. "Design, control and experimental testing of intelligent variable dual-fuel automotive engines." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691635.

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Cawood, Gareth James. "Design of a low-cost autonomous guided cart for material handling." Thesis, Nelson Mandela Metropolitan University, 2015.

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This dissertation covers the design and manufacture of an autonomous guided cart (AGC) for use in the material handling industry. General Motors South Africa (GMSA) requires a low-cost AGC for use in their Struandale plant. A budget of R35 000 per unit was proposed. The researcher, in collaboration with staff at GM, compiled a list of engineering requirements for the AGC. After research into the unique problems of the project, an examination of a previous design attempt by staff of GM Thailand, the researcher developed a new design, the subject of this report. Different solutions for each design problem were investigated before the design was finalised. A three-wheeled vehicle was designed making use of two motors in a differential-drive setup to control motion. Navigation is via a line-following mechanism, using an induction sensor-array in conjunction with a pre-laid metallic strip. To aid the design, the system was modelled to understand the different control elements at play. The researcher developed software for several aspects of the design: for the PLC controlling the system and motors; for a microcontroller that communicates with the PLC and a wireless module; for a computer server that communicates with a second wireless device, receiving information from the PLC; and a web interface to view this information. These form the SCADA integration of the project. The final product meets the GMSA specifications. It is a robot capable of towing a trolley of mass not exceeding 350 kg. While the robot is able to navigate a pre-laid route, it cannot reliably stop at marked locations. It is possible to monitor the system via a web-interface. The robot is capable of operating for an entire 8-hour shift before the batteries need to be recharged. The total cost of the prototype was R26 340.

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Brackin, Margueritte Patricia Dodd. "Translating the voice of the customer into preliminary design specifications." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17936.

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Buchmann, Macro. "Advanced monitoring system for bolted connections in vehicle construction." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1417.

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Bolted connections where used from the beginning of vehicle construction for joining two or more parts. The reliability of bolted connections is still a major problem. The objective of this research thesis is focused on an advanced monitoring system for bolted connections in vehicle construction. A mechanical “vibrating test bench”, which was developed by the aeronautical engineer Mr. Junkers, is being adapted, to suite the requirements of the automotive industry. It is designed according to DIN 65151 standards. The bolted connection is tightened to a specific torque to achieve the required preload forces and then exposed to an oscillating elastic shear force. The preload force and their loss are measured in relation to the number of load cycles. The ideal locking mechanism would be, if no settling occurs. Realistic in practice is the remaining of a sufficient preload force which doesn’t decry with time. The aim of this thesis is, to gain knowledge that will assist in the future control of the bolt locking procedure. The test bench can be used to verify the clamping capability of a bolted connection. With the dynamic computer-aided test system it will also be possible to test critical bolted joints and their safety, which reduces the probability of costly product recalls, or even severe cases of failure.

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Headley, F. Anthony Jr. "Performance limitations of an ejector heat pump." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/20290.

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Rose, Garrett. "Electrical subsystem for Shell eco-marathon urban concept battery powered vehicle." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2814.

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Thesis (Master of Engineering in Electrical Engineering)--Cape Peninsula University of Technology, 2018.
The purpose of this paper was to design and develop an electrical power train for an Urban Concept electric vehicle geared to complete the Shell Eco-Marathon Africa in 2019. Various technologies which make up the electrical drive train of an electrical vehicle were also reviewed which include the battery pack, the battery management system, the motors, the motor management system and the human interface. Upon completion of this, the various topologies best suited for this project were selected, designed, constructed and developed. Two motors were re-designed and constructed for this vehicle and the motor drive was also constructed to control these motors. A Lithium-Ion battery pack was constructed and developed to drive the motors and an off-the-shelf battery management system was purchased and developed to suit the requirements for the Shell Eco- Marathon competition rules. A human interface was also developed in order for the driver to see various parameters of the electric vehicle defined by the Shell Eco-Marathon competition rules. After each component of the drive train was constructed, they underwent various testing procedures to determine the efficiency of each individual component and the overall efficiency for the complete drive train of this electric vehicle was ascertained. The Product Lifecycle Management Competency Centre group developed the chassis for this vehicle. For this reason, only the electric subsystems were evaluated and a simulation was completed of the complete drive train. After the complete drive train was constructed and all the individual subsystems evaluated and simulated, a vehicle with an overall efficiency of about sixty percent was expected and the completed drive train should be adequate enough to complete the entire Shell Eco-Marathon Africa circuit.

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Tam, Kuok San. "Design and analysis of an electro-hydro-mechanical variable valve actuator for four-stroke automobile engines." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493685.

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Книги з теми "Automobiles Radiators Design and construction"

Competition car suspension: Design, construction, tuning. 3rd ed. Newbury Park, CA: Haynes North America, 1999.

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Staniforth, Allan. Competition car suspension: Design, construction, tuning. Sparkford, Near Yeovil, Somerset, England: Hynes, 1988.

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Brake design and safety. 2nd ed. Warrendale, Pa: Society of Automotive Engineers, 1999.

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Brake design and safety. 3rd ed. Warrendale, Penn: SAE International, 2011.

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Staniforth, Allan. Competition car suspension: Design, construction, tuning. Sparkford, Eng: Haynes, 1988.

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Automobiles by architects. Chichester: Wiley-Academy, 2000.

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Aird, Forbes. Race car chassis: Design and construction. Osceola, WI: Motorbooks International, 1997.

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Fagone, Enrico Leonardo. Car design: Genesi ed evoluzione del design automobilistico. Bologna: Compositori, 2012.

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Ryan, Borroff, ed. How to design cars like a pro. Minneapolis: MBI Pub., 2010.

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K, Ball Jeffrey, ed. Automotive engineering fundamentals. Warrendale, Pa: SAE International, 2004.

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Тези доповідей конференцій з теми "Automobiles Radiators Design and construction"

Glovnea, Romeo P., and Ovidiu S. Cretu. "Double-Cage Constant Power Continuously Variable Transmission (CP-CVT)." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95212.

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The paper focuses on the internal construction of an original Constant Power Continuously Variable Transmission (CP-CVT). In a recent publication the authors have introduced the fundamentals of the kinematics and dynamics of the CP-CVT. The present study focuses on the optimisation of the CP-CVT’s internal geometry and the size of its active elements in order to obtain maximum power transmitted with least variation over a range of transmission ratio. The paper concludes that for a specific geometry the CP-CVT presented offers promising characteristics that recommend it as a good candidate in the race of developing a new generation of the automobiles’ powertrain.

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Bieger, Virginia, and Jian Ma. "Investigation of Lightweight Space Radiator Design for Low and No Gravity Environments." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64646.

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Space heat rejection is heavily relying on radiator subsystem, which is only depended on pure radiation heat transfer and typical convection is not available. Increased efficiency coupled with reduced mass is of strategic importance in space thermal system. This paper reviews the existing individual aspects of lightweight space radiator subsystem designs under low and no gravity environments, i.e. working fluids, fin design, or optimization, based on standard construction materials. In addition, new concept approaches using latest technologies and their challenges are also investigated in this study. Common designs include heat pipe, liquid sheet, and liquid droplet radiators, the latter two being more conceptual than functional. Most technological advances have been made in the materials of construction and optimization areas while using the traditional heat pipe design since 1960s. Carbon composites are the most promising material for construction, as they possess a good heat transfer rate while minimizing the weight of the system. Working fluids selection has more to do with the operational temperature range than the system design, though construction materials must be taken into account when selecting a working fluid. Fin design is the least reported on, but the general consensus is triangular fins are the best option for minimizing weight while increasing surface area for radiation. Based on the review of current research, the most promising design would be a carbon composite heat pipe with a working fluid of liquid water or ammonia and triangular fins.

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Sharifpur, Mohsen. "Designing Boiling Condenser for More Efficiency in Power Plants and Less Environment Defects." In ASME 2007 Power Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/power2007-22201.

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One of the most important problems in the power plants is to increase the thermal efficiency of the cycle. Most of the works in this area is focused on regeneration devices, removing the heat losses of components…But usually, about half of the input energy in the thermal cycle wastes in the condensers. In this day and age with greenhouse effect and global warming problem, the less environment defect is also another important subject. In this work, a new condenser is offered that is the same as a core of BWR nuclear reactors, then during the working fluid is condensing in a cycle it is a boiling generator (boiling heat exchange) for another cycle. In this way not only could change some parts of unused energy to work, but also it has more capability with environment. It is possible to design this process several times with different cycles and different working fluids to low heat wastes from condensers. Here, it is offered this idea by using the data of Catalagzi power plant in Turkey. The results confirm that the thermal efficiency increases at least %7.5. It can use this method for most of the power plants or somewhere that needed to remove some heat from a device, same as radiators of the automobiles.

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Jancirani, J., S. Chandrasekaran, and P. Tamilporai. "Design and Heat Transfer Analysis of Automotive Disc Brakes." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47362.

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In the recent scenario of braking system for automobiles, disc brake takes up a wide range of applications, because of its simplicity in construction, operation and not self energizing as in the case of drum brakes. Since the disc brakes takes up a wide range of application, it is essential to ensure the reliable function of the braking system under varied operating conditions. The reliable function of the disc brake system is purely depends on the system based design. In this work, a linear regression technique is used for the optimal design of the disc brake rotor for varied operating conditions. Various forces involved during braking, energy generated during braking and the corresponding effective stopping distances were also calculated using appropriate governing relations and equations. In the varied operating conditions, the heat energy generated during braking should be driven away form the working surfaces of the components. To analyze this thermal loading and cooling phenomenon, a conventional convective heat transfer approach was also formulated and developed in this work. The analytical findings of the above approaches are demonstrated at the end and it is found to be quite satisfactory.

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Moriwaki, Ichiro, and Masahiko Nishiyama. "Gear Noise Diagnosis System for Automobile Transmission Using Artificial Intelligence: Improvement of Judgement Performance." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14442.

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Abstract Gear noise emitted from transmission units for automobiles should be evaluated by an expert of gear noise. Although on some production lines, quietness performance estimates from measured noise levels of the units, the estimation must be severe. There is no definite relationship between the measured noise levels and the evaluations by the experts. Therefore, for standing on the safe side, the estimation should be severe. As a result, such an automatic gear noise diagnosis system must yield transmission units with over-quality. The present study deals with a new gear noise diagnosis system to which an artificial intelligence is applied; i.e., a neural net is applied. The former evaluations by the new gear noise diagnosis system were quite good when the statistical property of the teacher signals from which the system learned was similar to that of population. This fact means many teacher signals are necessary on the practical use. The present paper describes a new method for digitizing the measured noise levels. This method provided good evaluations of the system even when the statistical property of the teacher signals were not similar to that of the population. In addition, a new method, “Moment Method” for determining the construction of the neural net was introduced instead of “Back Propagation Method”. The Moment. Method contributed to the improvement of the system judgements.

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Dahlstro¨m, Stefan, S. Jack Hu, and Rikard So¨derberg. "Identifying Variable Effects on the Dimensional Quality of Compliant Assembly, Using Computer Experiments." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/dac-34035.

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Compliant sheet metal assemblies are often used as support structures in automobiles, airplanes and appliances. These structures not only provide a metrology frame for other modules to be assembled, but also give the product its aesthetic form. For this reason, the dimension quality of the assemblies is a very important factor to control, in order to make sure that the product will function as planned and continuously keep the product cost low. The assembly is influenced by variations in the component parts and the assembly processes. Tolerance analysis, as conducted in most industries today, is normally based on the assumption of rigid parts and is thus not always valid for sheet metal assemblies, due to their compliance. This paper will present a method, based on finite element analysis (FEA) and design of computer experiments, of identifying the influence of input variables on the final geometry variation of the assembly. The influence and the interactions among the input variables are analyzed with a response model that has been constructed, using the simulation results. This response model could be used to identify the important variables that need to be controlled in assembly. An example application is included, in order to demonstrate the simulation model and response model construction. Analysis of the results from the simulations can facilitate the design of the assembly process, in order to control the dimensional quality of the product.

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Hernandez, Kristian, Ryan King, Joseph Lauth, Joshua Sharp, Eric Wittman, and Christopher Depcik. "Shape Comparison for Solar Thermal Parabolic Collector." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88475.

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The KU EcoHawks are a mechanical engineering, undergraduate, senior design group at the University of Kansas that focuses on projects emphasizing a sustainable approach to automobiles and energy infrastructure. Much of the EcoHawks construction work is completed at a barn on campus that does not currently contain a heating or air conditioning system. Due to the temperature extremes reached in Kansas during the summer and winter months, thermal comfort is problematic for students working within the barn. This past academic year, one design group implemented a heating system for the barn utilizing a solar thermal parabolic collector. During the design phase, research of the literature found relatively little information in regards to the optimized depth of the parabolic curve. As a result, a prototype solar thermal parabolic trough was built in order to test three different parabolic shapes with varied depths. Static testing of a 50-50 mix of ethylene glycol and water found that the parabolic shape with the smallest focal length had the greatest solar collection efficiency. From this assessment, a final parabolic trough design was created. The assumptions, testing procedure, and results of static testing for the optimum parabolic shape of a solar trough collector will be addressed herein.

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Lee, Ming-Chun, and Manasi Bapat. "Second life of great American parking garages: Exploring the potential of adaptive reuse of urban parking structures in the American cities." In 24th ISUF 2017 - City and Territory in the Globalization Age. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.5908.

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The structure of American cities has been greatly influenced and transformed with the onset of the car culture and its ever evolving impacts to the everyday life of American people. The early 1900’s experienced a noticeable growth in the demand and need for automobiles resulting in the increasing need for parking spaces in the city. Eventually, multi-level parking garages were built to suffice this requirement of the ever-growing city. However, increase of parking spaces around urban fringes; raise in gas prices; better public transit options in downtown cores; growing public awareness of reducing automobile dependence in order to address issues of sustainability; advancement in autonomous vehicles and demand-based traffic management, all are making existing parking garages obsolete and useless. The era of designing cities as if car access alone was sufficient appears to have ended. An opportunity lies where the existing underused parking garages can be repurposed into residential, entertainment, or work spaces rather than paying up for demolition and construction costs of an altogether new structure. It can be projected that this technical and architectural retrospection of existing parking garages can prove as a catalyst in resolving existing issues of the city. This paper traces past projects that have attempted to convert existing urban parking garages to other uses in North America. It then analyzes their design and construction approaches and discusses the implications of this type of conversion to the urban form of the areas surrounding these projects. Our initial investigation concludes with an analytical framework that includes the following criteria: type of garage structure; vertical circulation and ramp configuration; material and construction method; floor plan arrangement; size in relation to block and street orientation; surrounding area condition in terms of land use and street network. Furthermore, implications of garage conversion to urban form of surroundings can be examined by these measures: remediation of building façade; alternation in setback between public right of way and building footprint; change in active usage along building frontage.

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