Journal articles: 'Design calculations'

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DIAKUN, JAROSLAW. "Calculation procedures - simulation, optimization and design calculations." Polimery 44, no. 06 (June 1999): 390–96. http://dx.doi.org/10.14314/polimery.1999.390.

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A. Zh. Kassenov, A. S. Yanyushkin, A. V. Mazdubay, D. A. Iskakova, and T. L. Yevtushenko. "DESIGN OF SHAPED CUTTERS." Science and Technology of Kazakhstan, no. 3.2021 (September 27, 2021): 27–34. http://dx.doi.org/10.48081/xqgq2851.

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The article proposes an algorithm for designing round shaped cutters by graphical and analytical methods. Depending on the shaped profile of the part, this algorithm systematizes the calculation and allows you to apply a unified approach and easily automate it. The purpose of the design is the possibility of automating and reducing the calculation time of shaped cutters and is based on determining the radii of the nodal points of the shaped cutter through projections between the nodal points on the horizontal plane. A feature of the proposed algorithm for calculating shaped cutters is the consistency and the possibility of automating calculations that are simple and visual.

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Samiev, Luqmon, Khumora Jalilova, Sirojiddin Jalilov, Jamila Xusanova, and Dilnoza Mamatova. "Draft sprinkler irrigation system design development." E3S Web of Conferences 365 (2023): 03024. http://dx.doi.org/10.1051/e3sconf/202336503024.

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This article shows the analysis of the parameters of a sprinkler irrigation system following different natural conditions (climate, soil, and hydrogeological) and their analysis in the implementation of the hydraulic calculation and design. According to the majority of literature, several calculations are made for the pressure and discharge during sprinkler irrigation. In the system under analysis, calculations are made on the irrigation processes of pipes and their outflow. It uses Google Earth and AutoCAD. In the hydraulic calculation of the system parameters, it was determined that the area's natural conditions are important and that changes and additions should be made to the calculations.

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Sasongko, Anky Ismas. "Billing Management System Design for Cellular Phone Network Practicum Module 2.4 Ghz WiFi Transmission." Jurnal Jartel: Jurnal Jaringan Telekomunikasi 6, no. 1 (May 7, 2018): 17–22. http://dx.doi.org/10.33795/jartel.v6i1.133.

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This study aims to design and build a VoIP billing server that is used for calculating the cost of telephone conversations and designing a VoIP practicum module for students.The research method was carried out by conducting literature studies, network design planning, device configuration, determination of billing parameters and VoIP call testing to determine call quality and VoIP billing function.The result of this thesis is a telephone billing system application that is used to calculate VoIP-based telephone costs and the softphone application as a telecommunications medium. Where the billing server is well configured with the softphone application, the softphone application uses the simcard as data verification provided by the admin. The results of testing the success of telephone charges when 2 clients make calls with an initial pulse of 100 Rupiah, the result is a calculation of 100% between manual calculations and program calculations. And when the test was carried out, making calls more than 2 clients produced different data between manual and program calculations with an average of 101.75, the program calculation was on manual calculation of 100.The results of this difference were only for the first and second callers, the next caller had the results which is the same as manual calculation.

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M. Rzaeva, Sabina, Lida Lida, Tatiana V. Rzaeva, and Svetlana V. Zonina. "A Variation Study of the Bearing Designs of a Covering of the Designed Building of the II Level of Responsibility Span of 24 m." International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 1039. http://dx.doi.org/10.14419/ijet.v7i4.36.24949.

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In this work were considered the sequence of calculation of a metal-wooden farm of a segment outline, according to the set of rules "Wooden glued and whole wooden designs" Construction Norms and Regulations II - 25 - 80 (the joint venture 64.13330 - 2011) [1], "Steel structures" Construction Norms and Regulations of II - 23 - 81 (the joint venture 64.13330 - 2011) and Construction Norms and Regulations 2.01.07-85 "Loadings and influences" [2] for calculation of a metal farm with a trapezoid outline.The comparative analysis of calculations of loading of a body weight of farms, calculation of evenly distributed constant of the loading located on all flight, calculation of distributive snow loading is carried out. Settlement efforts in elements of farms are determined by method of cutting knots, longitudinal forces of N and the selections and check of sections of farms bending M. Derived moments are calculated in panels of the top belt. Owing to, the above-stated calculations a positive assessment of a possibility of design of the building with flight of 24 m is given, when calculating of the bearing designs on the greatest possible loadings where as a covering are offered metal-wooden segment and metal a trapezoid outline of a farm. According to the carried-out calculations, sections are picked up truly and undergo testing on all groups of limit conditions of building constructions, but after calculation of a consumption of material on designs of farms, it turned out that it is economically effective for design of the bearing designs of coverings to use a metal-wooden farm.

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Zámečníková, Tereza, Tomáš Mareš, Viktor Kulíšek, Zdeněk Padovec, Anna Malá, and Bohumil Kropík. "A Novel Semi-Analytical Approach to the Assessment of the Equivalent Stiffness of a Beam." Strojnícky časopis - Journal of Mechanical Engineering 72, no. 2 (November 1, 2022): 247–70. http://dx.doi.org/10.2478/scjme-2022-0033.

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Abstract This paper introduces several new approaches to stiffness calculation of the composite beam with a circular cross-section. The paper poses the problem of calculating the stiffness of the fibre-reinforced winded beam and introduces a new way of stiffness calculation. The novel semi-analytical calculation represents an approach that is less time consuming than conventional calculation methods or FEA methods. The expected application of the new method of calculation is in preliminary design and design calculations.

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Karedin, Volodymyr, and Nadiya Pavlenko. "CREDO RADON UA – INFORMATION MODEL FOR CALCULATION OF ROAD CONSTRACTION." Avtoshliakhovyk Ukrayiny, no. 3 (259) ’ 2019 (October 17, 2019): 34–42. http://dx.doi.org/10.33868/0365-8392-2019-3-259-34-42.

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CREDO RADON UA software provides an automated calculation of the strength of the pavement structures of non-rigid and rigid types, as well as the calculation of the strengthening of existing structures. In the article, one can see the main features and functionality of the CREDO RADON UA software, the main points in the calculations according to the new regulations. Information support of the design process includes necessary databases, informational and helping materials that make up the full support of the pavement design process. The concept of CREDO RADON UA 1.0 software is made on the use of elasticity theory methods in calculations of initial information models of pavements. Performing optimization calculations, the roadwear in CREDO RADON UA is designed in such a way that no unacceptable residual deformation occurs under the influence of short-term dynamic or static loading in the working layer of the earth bed and in the structural layers during the lifetime of the structure. The calculation algorithms were made in accordance with the current regulatory documents of Ukraine. CREDO RADON UA software allows user to create information bases on road construction materials and vehicles as part of the traffic flow for calculations. The presented system of automated modeling makes it easier for the customer to control the quality of design solutions, to reasonably assign designs to layers of reinforcement, to quickly make comparisons of calculations of different designs for the optimal use of allocated funds. Prospects for further improvement of the program should be the results of theoretical and experimental studies on filling the databases, which are used as information support for automated design of road structures. Keywords: CREDO RADON UA, road, computer-aided design, repair project, road pavement, strengthening, construction, rigid pavement, elasticity module, a transport stream, calculation method, information support, dynamic or static loading.

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Musiienko, Igor. "Automated calculation of road reinforced con-crete round culverts for operation in free-flow mode in program UKRRVS21." Bulletin of Kharkov National Automobile and Highway University, no. 93 (May 27, 2021): 112–17. http://dx.doi.org/10.30977/bul.2219-5548.2021.93.0.112.

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The modern approach to the design of road culverts involves the use of computeraided design (CAD). In design organizations of Ukraine software products of the Minsk company CREDO are being used for calculations of capacity of culverts by GRIS_T. Since 2019, the UKRRVS program is being developed to calculate culverts of road structures according to Ukrainian standards. At the moment, the program has the calculation of stormwater runoff according to MADI/SoyuzDorProekt formula and meltwater runoff (according the Road Handbook). In 2020, a new stage of automated calculation of road culverts started - calculations of capacity. The article presents the automated calculation of road reinforced concrete round culverts for pressureless operation. Goal. It is proposed to automate the calculation of road reinforced concrete round culverts for pressureless oper-ation. Methodology. The current methods for calculating the throughput of reinforced concrete road culverts have been used. Programming was carried out in the C# language using object-oriented programming. Results. The state of affairs in the auto-mation of hydraulic calculations in the road industry in accordance with Ukrainian standards was analyzed. It was concluded that at the moment the production uses the GRIS program of the CREDO company. The UKRRVS program is being developed. In this program, the issue of automating the calculation of the throughput of round culverts for operation in freeflow mode is relevant. The question of the methodology and algorithmization of this calculation, coding and interface support has been resolved. Practical value. The algorithm for calculating road culverts has been developed. A part of calculating the throughput of road culverts has been created in the UKRRVS program. This part covers the most com-mon group - round reinforced concrete culverts for freeflow operation. Originality. The interface has been created for the automation program for calculating road culverts. When you click the button “Round reinforced concrete pipes” in the main menu of the program UKRVS 21, the window “Calculation of a round reinforced concrete pipe operating in pressureless mode” opens. The calculation consists of three parts: the area of formation of initial data, the button “Calculate”, and the area of output of results of calculations. The area of formation of ini-tial data consists of 7 points. The area of the results of calculation of round reinforced concrete road cul-verts working in a pressureless mode consists of 14 points.

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Vaishampayan, Omkar, Akshay Joshi, and Savio Pereira. "A Review on Design of Hydraulic Disc Brakes and Calculations." International Journal of Scientific Research 3, no. 2 (June 1, 2012): 161–63. http://dx.doi.org/10.15373/22778179/feb2014/52.

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Kumar, R. Sateesh, J. Deepak, and O. Srinivas T. Prashanth. "Heat Load Calculations and Duct Design for Commercial Building G2." International Journal of Trend in Scientific Research and Development Volume-3, Issue-3 (April 30, 2019): 1253–58. http://dx.doi.org/10.31142/ijtsrd23309.

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Maciejczyk, Andrzej. "Shaft design using the inventor generator. Verification of the calculation module." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 568–72. http://dx.doi.org/10.24136/atest.2018.135.

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Paper presented the design process of an example shaft with the use of an Inventor generator, preceded by preliminary analytical fatigue calculations. The operation of the generator is discussed. Procedures of load introduction are indicated. The operation of the calculation module was analyzed. The results obtained by analytical calculations with those obtained during computer simulation were compared. The method of selecting the diameter of the shaft spigot without the need to perform tedious preliminary calculations is presented.

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Wu, Yingfei, and Zhaoying Zhou. "Design calculations for flexure hinges." Review of Scientific Instruments 73, no. 8 (August 2002): 3101–6. http://dx.doi.org/10.1063/1.1494855.

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Pleskach, V., and V. Ol’shanetskii. "About design and use of powder plain bearings." Innovative Materials and Technologies in Metallurgy and Mechanical Engineering, no. 2 (March 18, 2021): 45–49. http://dx.doi.org/10.15588/1607-6885-2020-2-6.

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Purpose. Optimization of methods of design, calculation and use of slip bearings; elaboration of recommendations on the use of powder materials and lubricants for the production of slip bearings. Research methods. Analysis of existing calculations of slip bearings, of efficiency of the bearing under conditions of self-lubrication and features of using hydrodynamic lubrication theory for calculations of slip bearings in the presence of liquid lubrication. Results. The area of predominant application of slip bearings, their main elements are clarified and described; recommendations on the sizes of structural elements of bearings are given. The main types of slipping friction and their relationship with the bearing design and operating conditions are analyzed. The possible composition of powder materials for slip bearings, the interdependence of bearing porosity and the viscosity of the oil used to ensure the of its longevity is analyzed. Recommendations for the design of bearings in conditions of liquid friction are given. Generalized methodology for calculating the efficiency of slip bearings is proposed. Based on the theory of hydrodynamic lubrication, a method for calculating slip bearings for liquid lubrication conditions, which provides optimal operating conditions is proposed. Scientific novelty. Optimized selection of powder material and structure to improve lubrication conditions is proposed. The analysis of the influence of the chemical composition of the oil to ensure maximum adhesion of this oil with a bearing surface is resulted; the analysis of the influence of the chemical composition of the oil to ensure maximum adhesion of this oil with a bearing surface, as well as mathematical dependencies that make it possible to adjust the composition of the oil by adding specially selected microadditives is resulted. Generalized approaches to the method of calculation of powder slip bearings, which operating under different friction conditions are proposed. Practical value. Practical methods of designing and calculating slip bearings from powder materials are offered.

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Mheissen, Samer, Jadbinder Seehra, Haris Khan, and Nikolaos Pandis. "Do sample size calculations in longitudinal orthodontic trials use the advantages of this study design?" Angle Orthodontist 92, no. 3 (February 4, 2022): 402–8. http://dx.doi.org/10.2319/091321-707.1.

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ABSTRACT Objectives To examine whether optimal calculations of the sample size are being used in longitudinal orthodontic trials. Materials and Methods Longitudinal orthodontic trials with a minimum of three time points of outcome assessment published between January 1, 2017, and December 30, 2020, were sourced from a single electronic database. Study characteristics at the level of each trial were undertaken independently and in duplicate. Descriptive statistics and summary values were calculated. Inferential statistics (Fisher's exact test and logistic regression) were applied to detect associations between reporting of a sample size calculation and the study characteristics. Results A total of 147 trials were analyzed; 75.5% of these trials reported a sample size calculation with none reporting optimal sample size calculation for longitudinal trials. Most of the longitudinal orthodontic trials did not report the correlation and the number of longitudinal measurements in calculating the sample size. An association between reporting of a sample size calculation (yes or no) and the type of journal (orthodontic and non-orthodontic) was detected with higher odds of reporting a sample size calculation in orthodontic journals than in non-orthodontic journals (3.04; 95% confidence interval, 1.4-6.59; P < .01). Conclusions The findings of this study highlighted that the undertaking of optimal sample size calculations in longitudinal orthodontic trials is being underused. Greater awareness of the variables required for undertaking the correct sample size calculation in these trials is required to reduce suboptimal research practices.

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Wang, Zhi Wei, and Ling Qin Meng. "Computer-Aided Calculation of the Box Centroid of Linear Vibration Screener." Advanced Materials Research 580 (October 2012): 16–19. http://dx.doi.org/10.4028/www.scientific.net/amr.580.16.

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In the design of the vibration screener, the calculation of screen box centroid has direct impact on the performance of the vibration screening machine. In traditional design, calculation of the screen box centroid is carried out through repeated calculations and the adjustment of the vibrator installation, of which the calculation process is tedious with low accuracy. This thesis deduces the formula of calculating screen box centroid by the way of mass decomposition method, and programs for calculation of the box centroid of Linear vibration screener through C language. With the computer aid, the present author realizes the accurate calculation of screen box centroid and enhances the level of design for vibration screener.

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Banda, Shobini, Prof Dr G. Manoj Someswar, and Dr B. Seetharamulu B. "DESIGN & DEVELOPMENT OF ROBUST MACHINE LEARNING DESIGNS UTILIZING AI CALCULATIONS TO CONTROL ADVERSIAL SETTINGS." International Journal of Innovative Research in Advanced Engineering 8, no. 4 (April 30, 2021): 50–60. http://dx.doi.org/10.26562/ijirae.2021.v0804.001.

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Numerous offices are currently utilizing AI calculations to settle on high-stake choices. Deciding the correct choice unequivocally depends on the accuracy of the info information. This reality gives enticing motivations to lawbreakers to attempt to mislead AI calculations by controlling the information that is encouraged to the calculations. Then, conventional AI calculations are not intended to be protected when going up against startling data sources. In this exposition, we address the issue of antagonistic AI; i.e., we will likely form safe AI calculations that are hearty within the sight of loud or adversarial controlled information. Ill-disposed AI will be additionally testing when the ideal yield has a mind boggling structure. In this paper, a sign cannot concentrate is on antagonistic AI for anticipating organized yields. To start with, we build up another calculation that dependably performs aggregate classification, which is an organized expectation issue. Our learning strategy is efficient and is defined as a raised quadratic program. This procedure verifies the expectation calculation in both the nearness and the nonappearance of an enemy. Next, we explore the issue of parameter learning for hearty, organized forecast models. This strategy builds regularization capacities dependent on the impediments of the foe. In this exposition, we demonstrate that strength to antagonistic control of information is proportionate to some regularization for huge edge organized expectation, and the other way around. A customary enemy consistently either does not have enough computational capacity to structure a definitive ideal assault, or it doesn't have sufficient data about the student's model to do as such. In this manner, it frequently endeavors to apply numerous irregular changes to the contribution to an expectation of making a leap forward. This reality suggests that on the off chance that we limit the normal misfortune work under antagonistic clamor, we will acquire power against unremarkable enemies. Dropout preparing takes after such a commotion infusion situation. We infer a regularization technique for huge edge parameter learning dependent on the dropout system. We stretch out dropout regularization to non-straight parts in a few unique ways. Experimental assessments demonstrate that our procedures reliably beat the baselines on various datasets. This exploration work incorporates recently distributed and unpublished coauthored material.

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PATASKAR, ANKESH KUMAR, V. N. BARTARIA, and ABHISHEK JAIN. "Axial Flow Fan Design Parameter Affecting the Performance." Material Science Research India 9, no. 2 (December 25, 2012): 247–50. http://dx.doi.org/10.13005/msri/090212.

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Axial flow fans are employed in heat exchangers and other engineering systems where the flow path around the fan becomes like a duct. The flow takes place along the axis of rotation of the rotor. The flow is essentially symmetrical to the axis. The design calculations are performed with presumption of flow through cascade of blade and it is the main governing factor of the design too. In this paper procedural calculation for an axial flow fan with profiled blade are presented. Calculations are tabulated for different parameter of radius and angles. On profiling, the increase of outlet angle has been shown which gives ultimate angle opening. The small corrections are therefore obtained. Different parameters used in the design are tabulated to get the calculation more accurately.

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Chemeul, J., and M. I. Silivina. "Modern designs and design calculations for multistage regulating valves." Chemical and Petroleum Engineering 34, no. 1 (January 1998): 47–54. http://dx.doi.org/10.1007/bf02418912.

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Igic, Tomislav, Slavko Zdravkovic, Dragan Zlatkov, Srdjan Zivkovic, and Nikola Stojic. "Stability design of structures with semi-rigid connections." Facta universitatis - series: Architecture and Civil Engineering 8, no. 2 (2010): 261–75. http://dx.doi.org/10.2298/fuace1002261i.

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The paper points out to the differences of the First order theory and Second order theory and of the significance in practical calculations. The paper presents theoretical foundations and expressions of calculations of impacts on the stability of structure, that is, review of the Second order theory in a bridge with members semi-rigid connections in joints. In the real structures in general and the especially in the prefabricated structures the connection of members in the nodes can be partially rigid which can be very significant for the changes in tension and deformation. If the influence of the normal forces is significant and the structure is slender then it is necessary to carry out a calculation according to the Second order theory because the balance between internal and external forces really established on the deformed configuration and displacements in strict formation are also unreal. The importance and significance of the calculations and distribution of impact according to the Second order theory were presented in numerical examples as well as the calculation of critical load as well as the buckling length of members with semi-rigid connections in joint.

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BONDARENKO, M. E., R. N. POLYAKOV, A. V. GORIN, and I. V. RODICHEVA. "JUSTIFICATION OF THE DESIGN SEQUENCE COMBINED SUPPORTS WITH VARIABLE CHARACTERISTICS." Fundamental and Applied Problems of Engineering and Technology 3 (2021): 139–45. http://dx.doi.org/10.33979/2073-7408-2021-347-3-139-145.

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The article presents the sequence of calculating a combined support with variable parameters in the form of an algorithm. The application of the graphical editor of the CAE–system APM Win Shaft for modeling a rotor rotating in combined supports with variable characteristics is described. The results of the calculation module are presented. The obtained Kembel diagrams are considered. An analysis is given to the switching diagrams of a combined support with variable characteristics during operation in transient processes according to a certain algorithm. The presented algorithm eliminates the possibility of increasing the amplitude of oscillations when passing through critical frequencies. Conclusions are drawn about the effectiveness of using the specified sequence of calculations Recommendations are given on the use of the proposed calculation sequence for the design of similar combined supports with variable characteristics.

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Drga, Juraj, Michal Holubčík, and Stanislav Gavlas. "Design of an Experimental Device for Simulation of Pipeline Expansion." MATEC Web of Conferences 328 (2020): 03005. http://dx.doi.org/10.1051/matecconf/202032803005.

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This article describes the design of an experimental device for simulating pipe expansion. The device consisted of various variants of compensating elements and types of piping materials. Based on this, a 3D model was developed, together with numerical design calculations of compensators. Subsequently, a more complex analysis was performed by using the CAE Pipe calculation program, which performed calculations of dilatations, forces at fixed points and stresses in the pipeline.

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WORSZTYNOWICZ, Barbara. "Experimental verification of design calculations of the internal combustion engine cooling system." Combustion Engines 179, no. 4 (October 1, 2019): 132–35. http://dx.doi.org/10.19206/ce-2019-421.

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The article presents a comparative analysis of calculation results and measurement results of cooling module built on the basis of design calculations. The computations were made in software dedicated to the calculations of heat exchangers. The measurements were performed on a cooling system mounted in a special purpose vehicle together with a combustion engine, which was loaded by an engine dynamometer. Based on the comparison between input data for calculations and results of measurements, differences were found, therefore changes were proposed to be made in the model.

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Eliseev, Mikhail Semenovih, Ivan Ivanovich Eliseev, Dmitriy Alekseevich Rybalkin, and Aleksey Maksimovich Maradudin. "Calculation of a volumetric liquid dispenser." Agrarian Scientific Journal, no. 12 (December 15, 2019): 90–93. http://dx.doi.org/10.28983/asj.y2019i12pp90-93.

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The article considers the theoretical calculation of a volumetric liquid dispenser. As a result of the calculations, a formula was obtained that relates all the main parameters of the dispenser to the angular speed of rotation of the metering tank, which allows calculating design and operating parameters of the metering devices.

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Żywicki, Jędrzej, Paweł Dymarski, Ewelina Ciba, and Czesław Dymarski. "Design of Structure of Tension Leg Platform for 6 MW Offshore Wind Turbine Based On Fem Analysis." Polish Maritime Research 24, s1 (April 25, 2017): 230–41. http://dx.doi.org/10.1515/pomr-2017-0043.

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Abstract The article presents the calculation and design stages of the TLP platform serving as a supporting construction of a 6 MW offshore wind turbine. This platform is designed to anchor at sea at a depth of 60 m. The authors presented the method of parameterization and optimization of the hull geometry. For the two selected geometry variants, the load and motion calculations of the platform subjected to wind, wave and current under 50-year storm conditions were performed. The maximum load on the structure was determined in these extreme storm conditions. For these loads, the MES calculation of the designed platform was performed for the selected variant. Authors have presented a method for calculating maximum wind, wave and current stresses on the structure during the worst storm in the past 50 years. For these loads the MES endurance calculations of the designed platform were made. Based on the results of these calculations, the required structural changes and recalculations have been made in succession to the structural design of the platform, which meets the design requirements and has the required ad hoc strength. The article contains stress analysis in „difficult“ nodes of constructions and discusses ways of solving their problems. The work is part of the WIND-TU-PLA project from the NCBR Research Agreement (Agreement No. MARTECII / 1/2014).

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Kuppan, T. "Alternate Design Charts for Fixed Tubesheet Design Procedure Included in ASME Boiler and Pressure Vessel Code, Section VIII, Division 1." Journal of Pressure Vessel Technology 117, no. 2 (May 1, 1995): 189–94. http://dx.doi.org/10.1115/1.2842109.

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Design formulas and calculation procedure for the design of fixed tubesheets of shell and tube heat exchangers are included in Appendix AA—Nonmandatory of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1. To minimize the number of calculations, charts are provided as part of the design procedure. This article provides alternate charts for certain parameters and the original version of the charts are extended for larger values of tubesheet design parameter. Numerical values are given in tabular form for certain functions used in plotting the design charts. This will help to do design calculations without referring to the charts.

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Rusu, Alexandru Viorel, Catalin Daniel Galatanu, Gheorghe Livint, and Dorin Dumitru Lucache. "Average Luminance Calculation in Street Lighting Design, Comparison between BS-EN 13201 and RP-08 Standards." Sustainability 13, no. 18 (September 10, 2021): 10143. http://dx.doi.org/10.3390/su131810143.

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This paper presents a study on the influence of the observer’s position in relation to the calculation surface. This is the initial observation of the research, respectively that the two standards consider the position of the observer differently. For these situations, two types of calculations were performed. For the first set of calculations, the software used was DIALux 4.13 as this software can perform calculations in line with the RP-08 standard. The second set of calculations was performed with a script that offers the possibility to change the observer’s position. The conclusion was that EN-13201 has a better approach, but both standards could be improved. The second case study refers to the influence of the longitudinal observer position in an average luminance calculation. If one considers RP-08 as a guideline for performing the calculations, the conclusions are that changing the distance from the observer to the calculation surface has absolutely no effect on the average luminance value. On the other hand, if European standards are used as a guideline, changing the distance (from the standardized 60 m, either closer to the calculation surface or further away) can influence the overall results in average luminance and uniformity. Taking into account the results of these two case studies, the conclusion is that both RP-08 and BS-EN 13201 should be updated so that the observer’s distance in relation to the calculation surface would be a variable dependent on the stopping distance calculated based on the speed limit of the road.

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Villón-Béjar, Máximo. "HidroEsta, software for hydrological calculations." Revista Tecnología en Marcha 29, no. 5 (April 6, 2016): 95. http://dx.doi.org/10.18845/tm.v29i5.2520.

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This investigation, “HidroEsta, software for Hydrological Calculations” is oriented towards the creation of a computing tool using Visual Basic intended to facilitate and simplify difficult calculations that must be carried out in hydrological studies. The software allows making calculations of statistical parameters, as well as linear and non-linear, simple and multiple regression calculations, and polynomial regressions. It is also useful for evaluating if a series of data can be fitted to a series of distributions, and calculating design events with a given probability of occurrence, based on a seasonal variation curve or a duration curve; analyzing a storm and calculating maximum intensities based on pluviograms data; calculating flow measurements taken with windmills or current meters; calculating maximum flows with empirical and statistical methods; calculating evapotranspiration and hydric balance. Several numeric methods were used to solve the equations, selecting the most appropriate one for each case. The results of this work provide civil, agricultural engineers, and agronomists, hydrologists and other specialists who work in this field with a tool that enableZs them to carry out calculations, rapid simulations, and determine flow or precipitation for designs.

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NOWAKOWSKI, Jacek, Krzysztof SIKORA, and Szymon CYPCER. "Predesign of a cylinder head of compression ignition engine." Combustion Engines 179, no. 4 (October 1, 2019): 236–42. http://dx.doi.org/10.19206/ce-2019-439.

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The paper presents the initial design of the four-cylinder CI engine head and the analysis of the strength of the head with the use of FEM. The article covers: general assumptions of the designed head, analytical design calculations, three-dimensional head model and timing system components using CAD. The scope of calculations using the head calculation model includes strength calculations and determination of the amount of strain caused by the given load.

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Boltnev, Denis Evgenyevich, Irina Alevtinovna Vysotskaya, Alexey Vasilyevich Skrypnikov, Andrey Nikolaevich Bryukhovetskiy, and Petr Viktorovich Tikhomirov. "Designing of a longitudinal profile of a forest automobile road on increases." Transport of the Urals, no. 4 (2021): 96–99. http://dx.doi.org/10.20291/1815-9400-2021-4-96-99.

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The paper proposes a method for calculating the project line on the rise. A combination of individual sections with different slopes of the project line is considered, which ensures that the timber carrier can overcome the rise, if possible, in a direct drive. The given method of calculating the project line on the ascent makes it possible to quickly, without complicated calculations, choose the best options for the project line, ensuring maximum use of the vehicle with minimum fuel consumption. It is advisable to recommend the mentioned calculation method to design organizations for the design of a longitudinal profile in a broken area.

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Maeda, Takuji, and Kiyotoshi Komaya. "Revised Design Calculations of Lift Systems." IEEJ Transactions on Industry Applications 118, no. 7-8 (1998): 836–42. http://dx.doi.org/10.1541/ieejias.118.836.

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KLEMENCIC, ADOLF. "CALCULATIONS AND DESIGN OF SLEEVE BEARINGS." Journal of the American Society for Naval Engineers 64, no. 1 (March 18, 2009): 104–20. http://dx.doi.org/10.1111/j.1559-3584.1952.tb03917.x.

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Martelli, F., and V. Michelassi. "Using Viscous Calculations in Pump Design." Journal of Fluids Engineering 112, no. 3 (September 1, 1990): 272–80. http://dx.doi.org/10.1115/1.2909400.

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A viscous computer code for designing the meridional channels of high-performance pumps is presented. An averaging technique is used to reduce the three-dimensional flow to a two-dimensional model. The code, based upon an implicit finite difference method for steady two-dimensional incompressible flows, was validated in complex flow geometries prior to application in the design analysis of an actual pump. Viscous effects are taken into account by two different turbulence models. The Navier-Stokes solver is used in conjunction with a standard blade-to-blade calculation by means of an automatic graphic procedure that exchanges geometric and flowfield data. Various meridional shape solutions are presented and discussed in relation to physical evidence.

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ZHU, Z. Q., J. C. SU, and B. Y. CHEN. "ANALYSIS/DESIGN CALCULATIONS OF TRANSONIC FLOWS." International Journal of Computational Fluid Dynamics 3, no. 1 (January 1994): 53–69. http://dx.doi.org/10.1080/10618569408904499.

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Gu, Zhong Lei. "Design calculations for suspended vertical equipment." International Journal of Pressure Vessels and Piping 42, no. 2 (January 1990): 157–68. http://dx.doi.org/10.1016/0308-0161(90)90016-b.

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Wood, Kristin L., Kevin N. Otto, and Erik K. Antonsson. "Engineering design calculations with fuzzy parameters." Fuzzy Sets and Systems 52, no. 1 (November 1992): 1–20. http://dx.doi.org/10.1016/0165-0114(92)90031-x.

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Ki-Oook, Kim. "Improved calculations of modal design sensitivities." Computers & Structures 37, no. 5 (January 1990): 777–80. http://dx.doi.org/10.1016/0045-7949(90)90107-d.

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Misyulya, D. I., V. V. Kuzmin, and V. A. Markov. "Research, design, calculations, and operating experience." Chemical and Petroleum Engineering 46, no. 3-4 (July 2010): 121–24. http://dx.doi.org/10.1007/s10556-010-9303-z.

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Li, Nan, and Bao Wei Song. "Research of the Calculation Method Structure System Fuzzy Reliability Based on the Fault Tree." Advanced Materials Research 201-203 (February 2011): 968–73. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.968.

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With the gradual development of the study of mechanical structure design to system-level, When the system is too complex, the traditional method of calculating the structure of fuzzy reliability has been unable to calculate the fuzzy reliability of structural systems. This paper present a system based on fuzzy fault tree reliability calculation method to solve this problem, it expanse the application of fuzzy theory in the mechanical design. The method has been test in the calculations fuzzy reliability of torpedo shell structure.

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Dobysheva, Tatiana, and Ekaterina Gladkova. "Improvement of methods for determining the cost of design documentation in construction." MATEC Web of Conferences 212 (2018): 09005. http://dx.doi.org/10.1051/matecconf/201821209005.

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The problems of definition of the cost of design in construction are considered in the article. The existing regulatory documentation for determining the value of construction products on the territory of the Russian Federation is analyzed. A comparative analysis of the currently used methods for calculating the cost of designing is executed. The advantages and disadvantages of each method are considered, and the necessity of transformations in the sphere of determining the cost of design works is substantiated. The ways of increasing accuracy of calculation of the cost of design in construction are suggested, including the use of the territorial coefficient in calculations when utilizing the method of dependence on the natural indicators of the design objects. It is revealed that the use of this coefficient significantly increases the accuracy of calculations. For the method of calculating the cost of design as a percentage of the total cost of construction, it is proposed to clarify the methodology for calculating the cost of construction of multi-apartment buildings according to the enlarged construction price standards. It is proved that today it is impossible to replace the value of individual structural elements of an object in the event of differences in the design solutions with the solutions represented by similar objects in the collection of the construction price standards. The ways of solving these issues by the use of collections of standards for the price of construction solutions are outlined. The authors are convinced that the improvement of methods for calculating the cost of design products will improve the efficiency of investments in the construction industry.

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Agapov, V. P., and K. R. Aydemirov. "INVESTIGATION OF THE CARRYING CAPACITY OF REINFORCED CONCRETE SLABS WITH CRACKS AFTER THEIR REINFORCEMENT WITH COMPOSITE FABRICS BY THE FINITE ELEMENT METHOD USING THE PRINS COMPUTER COMPLEX." Herald of Dagestan State Technical University. Technical Sciences 45, no. 4 (June 27, 2019): 142–52. http://dx.doi.org/10.21822/2073-6185-2018-45-4-142-152.

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Objectives. The finite element method for cracked reinforced concrete slabs analysis after they were reinforced with composite fabrics in order to determine the residual safety factor is considered. Method. The method is based on the use of algorithms for calculating of structures with the account of the geometrical and physical nonlinearities, implemented in the PRINS program. These algorithms assume the use of the same calculation scheme in the process of the problem solving. However, the specifics of the assigned problem is that the design sсheme of the structure before the appearance of defects in it and after its amplification with the help of composite materials should change. Result. Taking into account this circumstance, the algorithms of nonlinear calculation of structures under the PRINS program were supplemented with an option that allows changing the parameters of the design scheme in the process of through calculation. To study the bearing capacity of reinforced concrete slabs, multilayer finite elements are used, for each of which a specific package of materials is specified. Modernization of the design scheme in this case comes down to replacing one package of materials with another. An example of calculation of a slab with a crack reinforced with composite fabric is given. Conclusion. It is shown that the use of a tunable design scheme can significantly improve the accuracy of calculations. In this case, the final result depends on what stage of the formation of defects in the slab its strengthening is realized. The special multilayered finite elements of a quadrangular shape are used in calculations. The elements consist of four simple triangles, for which most of the matrix characteristics are calculated in a closed form. This is especially important when carrying out nonlinear calculations that require repeated computations of these characteristics.

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Shabanov, Vitalii, Albina Rakhimberdina, and Ilya Yanikiev. "ON THE ISSUE OF DETERMINING THE ELECTRICAL LOADS OF TRANSFORMER SUBSTATIONS." Electrical and data processing facilities and systems 18, no. 1 (2022): 114–22. http://dx.doi.org/10.17122/1999-5458-2022-18-1-114-122.

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Relevance The calculation of electrical loads is the basis for choosing the carrying capacity of all elements of the electrical network. An increase in rated loads compared to the necessary ones leads to cost overruns on power transmission lines and an increase in power of transformers, and a decrease in rated loads leads to increased power dissipation in networks, increased heating of conductors and transformers and increased thermal deterioration of their insulation. The reliability of the calculation of electrical loads depends both on the reliability of the calculation coefficients used and on the correctness of the methods used. Therefore, the research and improvement of the calculation of electrical loads in the design of power supply systems is an actual problem. Aim of research To investigate the determination of rated loads of transformer substations, methods of accounting for power dissipation in different modes of operation of the power supply system and methods for determining rated currents of cable lines to transformer substations. To consider the correctness of the use of standard forms for determining electrical loads recommended by regulatory documents. To develop a generalized form of performing calculations of electrical loads of transformer substations, combining the calculation of loads on the side of lower and higher voltages. Research methods To solve the tasks, the definition of electrical loads according to standard forms of regulatory documents is investigated. The methods of accounting for power dissipation in transformers under different operating modes of the power supply system and the determination of rated currents along cable lines to transformer substations are considered. Results The shortcomings of the execution and design of the calculation of electrical loads according to standard forms are revealed: standard forms do not contain information at which values of the heating time constant calculations are performed to determine the rated power of the electrical power load on the side of the lower and higher voltages of transformer substations, do not contain the definition of power dissipation in transformers. Ways of improving the calculation of electrical loads of transformer substations are proposed. A generalized form of execution and design of calculations of electrical loads of transformer substations have been developed, which include the values of time constants when calculating electrical power loads, the type and passport data of the selected transformer, calculations of power dissipation in transformers in two modes and calculations of the load current of cable lines to transformer substations.

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Achour, Bachir, and Mohammed Khattaoui. "Design of Pressurized Vaulted Rectangular Conduits Using the Rough Model Method (Part 2)." Advanced Materials Research 1025-1026 (September 2014): 24–31. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.24.

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The problem of calculating the diameter of a pressurized vaulted rectangular conduit is solved explicitly through two methods which are based on an referential rough model whose geometric and hydraulic characteristics are well defined. The first method provides a highly reliable approximate relation which gives very accurate results for all practical applications. The second method consists in introducing into the calculations a rectangular rough model whose geometric and hydraulic properties were judiciously chosen. The theoretical development leads to an equation of third degree whose resolution has been made possible by the hyperbolic and trigonometric functions. Practical examples are presented to explain the procedure of calculation.

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Ermakova, Evgenia, Timur Elberdov, and Marina Rynkovskaya. "Shape Optimization of a Shell in Comsol Multiphysics." Computation 10, no. 4 (March 30, 2022): 54. http://dx.doi.org/10.3390/computation10040054.

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Optimization calculations are currently an actual and in-demand direction of computer-aided design. It allows not only the identification of the future characteristics of an object, but also the implementation of its exact model using a set of various optimization algorithms. The advent of digital modeling has significantly facilitated the approach to optimization and its methods. Many software systems are equipped with capabilities not only for calculating the design, but also for finding its optimal variant. The calculation programs can include a special optimization module that can be based on one or more mathematical methods. The purpose of the present study is to explore a process of shape optimization through the calculation of two shells: the simple one (spherical dome) and complex one (helicoid) in Comsol Multiphysics using three optimization methods: MMA, SNOPT and IPOPT. Additionally, special attention is paid to the construction of a mesh for calculations and two types of selected element sizes: finer and fine. Then, the important task is to compare the obtained results and to find the most optimal method and most effective design solution for each shell. When calculating the sphere, the most suitable solution was obtained using the IPOPT method, with the help of which it was possible to achieve an optimal reduction in the dome along the z-axis. When calculating the helicoid, all methods showed approximately the same values and equally changed the angle of inclination of the surface relative to the horizontal plane.

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Mitkeev, Artem, Anatoliy Dement'ev, and Evgeniy Podoplelov. "CHOOSING THE OPTIMAL DESIGN OF THE MIXING DEVICE." Modern Technologies and Scientific and Technological Progress 2022, no. 1 (May 16, 2022): 37–38. http://dx.doi.org/10.36629/2686-9896-2022-1-37-38.

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The paper discusses the features of the choice of a mixing device for boiler-type apparatuses. In particular, the hydrodynamic calculation of the mixing device of the apparatus for the preparation of commercial oils was carried out and, based on the results of calculations, the most optimal design of the mixing device was selected

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Cheng, Xian Chun, Xiao Wei Jiang, and Shao Jun Liu. "Design and Research on New Type Fitness Washing Machine." Advanced Materials Research 295-297 (July 2011): 2589–93. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2589.

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Since the fitness washing machine can combine the fitness movement with the housework, this paper analyzes the design purpose and meaning of fitness washing machine. In view of the design problem of the existing fitness washing machine, this paper designs a new type fitness washing machine and states the specific design scheme, related calculation and structure, application method and innovation points, among them the part of design methods mainly expounds the technical key points, technical index and transmission line, and the part of related calculation and structure mainly expounds the human calculations, design main parameter selection and washing machine connection part structure. Furthermore, the application method is introduced. At last, the innovation points have been pointed out.

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Feri, Mulya, and Chairul Gagarin Irianto. "Lighting System Design Based on SNI 6197-2011 and Software-Based Design DIALux Evo 9.2 (Case Study: Pekanbaru High School of Technology)." ELKHA 14, no. 2 (October 20, 2022): 73. http://dx.doi.org/10.26418/elkha.v14i2.50278.

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Lighting is one of the important factors in a room design. The intensity of lighting that does not meet the standards can affect eye health and work activities. In this study, measurements of the lighting intensity were carried out at Pekanbaru College of Technology (STTP) i.e., in classroom 01A and library. Lumen method is one of the calculation methods to determine the number of luminaires required to improve the lighting quality in the room. For the lighting in classroom 01A, the mathematical calculations result in 363.23 lux while the DIALux evo 9.2 software obtained 375 lux. There is 3.1% difference in these results This might occur because the condition of the room, supporting equipment, and color has an influence on the results of calculations and the spread of light, while the effect of color is not considered. However, in calculations using DIALux evo 9.2 software, surface color has an influence on the results obtained.by changing the specifications of the lamp using the type of LED lamp. The lighting standard to improve the lighting system refers to SNI 6197:2011.

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Panov, A. A., S. Yu Zhuravlev, and Yu Yu Zhuravlev. "Independent risk assessment and initial data for calculation of fire risk in public buildings, constructions and fire divisions of different classes of functional fire hazard." Pozharovzryvobezopasnost/Fire and Explosion Safety 28, no. 5 (November 19, 2019): 9–18. http://dx.doi.org/10.18322/pvb.2019.28.05.9-18.

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Introduction. Technical regulation is the main tool for ensuring safety at all stages of the life cycle of an object (building, structure). Currently, the provisions of regulatory documents governing fire risk calculations need to be updated and clarified. Independent risk assessment and baseline data for calculating risk. The planning of inspections by the supervisory authorities of the Emercom of Russia is carried out depending on the frequency category assigned to the object of protection with the frequency appropriate for this category. The calculation of the fire risk assessment is subject to verification by an official of the state fire supervision authority exclusively within the framework of a scheduled (unscheduled) inspection in accordance with paragraph 63 of the Administrative Regulation, namely, verification of the source data used in calculating the risk. Departmental norms and recommendations provide a standard basis (report structure) based on risk assessment, which takes into account various requirements for modern design and reflects the requirements of the law on discrimination on the basis of disability in relation to the principles of inclusive design. At the same time, it should be emphasized that the above departmental norms and recommendations, despite their practical significance, do not reflect the issue of source data for practical purposes and cannot serve the tasks posed by modernity. Conclusion. The peculiarity of the calculations consists primarily in the need to submit those to a specific capital construction object, using the source data, which will allow the calculation to be carried out correctly and allow the Ministry of Emergency Situations inspector to verify the calculation. The issue of specifying the initial data in fire risk calculations, which are used more than once at various protection facilities, seems appropriate to be reflected in the relevant regulatory documents, which will greatly contribute to improving the actual safety of people and the correct calculation.

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Aryassov, G., D. Gornostajev, and I. Penkov. "Calculation Method for Plates with Discrete Variable Thickness Under Uniform Loading or Hydrostatic Pressure." International Journal of Applied Mechanics and Engineering 23, no. 4 (November 1, 2018): 835–53. http://dx.doi.org/10.2478/ijame-2018-0046.

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Abstract The article proposes a new analytical method for the calculation of plates with constant and variable rigidity parameters. This method renders it possible to decrease the weight of the plates working under hydrostatic pressure by using variable thicknesses. Firs, a short overview of existing calculation methods and their results are compared. It is shown that all existing methods depend on boundary conditions. Then is given the theory of the proposed calculation method is described and calculations for plates with constant and variable thickness worked under uniformly loaded forces and hydrostatic pressure are made. The results are compared to the FEM calculations and experimental results obtained by a tensile test machine and special equipment. Calculation results obtained by the proposed analytical method and FEM results are very close. Deviations are not more than 11%. Deviations between theoretical calculations and experimental results depend on loading type and design of the test specimens but maximum values are not more than 17%. The proposed calculation method does not depend on the boundary conditions and can be used for plate calculations. Especially for plates with difficult design and complex loading.

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Darmawan, Steven Mangihut, Steven Darmawan, and Suroso Suroso. "EVALUASI DESAIN TERMAL KONDENSOR PLTN TIPE PWR MENGGUNAKAN PROGRAM SHELL AND TUBE HEAT EXCHANGER DESIGN." POROS 12, no. 1 (August 1, 2017): 10. http://dx.doi.org/10.24912/poros.v12i1.678.

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Abstract: The study was executed to get a quick calculation method for the design of equipment heat exchanger type shell and tube with a program shell and tube heat exchanger design. The purpose of this study was to obtain the results of the validation program shell and tube heat exchanger design of a condenser with power 4368.75 kW and the results of the evaluation program shell and tube heat exchanger design on the thermal design condensers nuclear power plant AP1000 PWR type. Input data into the program is done by inserting the parameters temperature, flow rate, physical properties and geometrical dimensions of the available designs of heat exchanger equipment specifications. Parameter for comparison of data can be obtained from the results of other calculations or experimental data. The results of comparison of the validation program shell and tube heat exchanger with condenser design calculations showed the highest difference found on Utube parameter equal to 1.3% lower than the design condition. This occurs because of differences in calculation between the program designed. The result evaluation of program shell and tube heat exchanger design toward the thermal design condensers nuclear power plant PWR type AP1000 obtained unknown parameters from the technical specifications.

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Ignatova, Elena. "Automated calculation of reduced resistance to a heat transfer of the window based on BIM technologies." MATEC Web of Conferences 193 (2018): 03018. http://dx.doi.org/10.1051/matecconf/201819303018.

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The aim of this work is the development of automated methods of calculation of thermophysical characteristics of the window based on BIM technology. The structure and materials of window frames and glazing are taken into account while calculating reduced resistance to a heat transfer of the window. Software Autodesk Revit was used for creating the information model of the window. As a result of current research a parametric families of windows were created. Each family contains an automatically calculated parameter of reduced resistance to a heat transfer of the window. Windows with one, two and three sashes were considered in the paper. Calculations have been made for wooden and plastic frames. Russian design standards were taken into consideration. The results of the calculations of reduced resistance to a heat transfer of the window are presented in the table at the end of the paper. The introduced method is universal for any window structure. Accurate calculation of heat loss of window units will allow to choose the design decisions and to predict energy costs for building maintenance.

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Journal articles on the topic 'Design calculations'

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