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M. Carvalho¹, J. Milho^2,3 and J. Ambrosio²

¹UNIDEMI, Department of Mechanical and Industrial Engineering, Faculty of Science and Technology, Universidade NOVA de Lisboa, Portugal
²IDMEC, Instituto Superior Técnico, Universidade de Lisboa Lisboa, Portugal
³CIMOSM, ISEL - Instituto Superior de Engenharia de Lisboa Instituto Politécnico de Lisboa, Lisboa, Portugal

Keywords: injury biomechanics, railway crashworthiness, simulation, optimisation.

Abstract

This paper presents a multiobjective optimisation problem formulation for the identification of the seating layout design parameters for the coach interior safety during the crash of railway vehicles. The optimal problem is defined by the minimization of the relevant injury criteria for railway passengers that leads to a set of design solutions that are searched using a multiobjective genetic algorithm. The evaluation of the objective functions is based on the use of surrogate response surface functions instead of using directly the dynamic analysis. The only real costs involved in the methodology presented reside on the number of analysis with the detailed model required to identify the quadratic surface parameters, this number always being smaller than the number of iterations taken in any optimisation process. The results show that the optimal designs of the interior seating layout are obtained with relevant decreases of the injury indices and it is also observed that the difference between the injury indices evaluated using the surrogate model are in weighted average less than 5% different from those calculated with the realistic detailed model.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	International Journal of Railway Technology ISSN 2049-5358 IJRT, Volume 6, Issue 4, 2017 Multi-Objective Optimisation of Railway Vehicle Seating Design for Passive Safety Improvement M. Carvalho¹, J. Milho^2,3 and J. Ambrosio² ¹UNIDEMI, Department of Mechanical and Industrial Engineering, Faculty of Science and Technology, Universidade NOVA de Lisboa, Portugal ²IDMEC, Instituto Superior Técnico, Universidade de Lisboa Lisboa, Portugal ³CIMOSM, ISEL - Instituto Superior de Engenharia de Lisboa Instituto Politécnico de Lisboa, Lisboa, Portugal doi:10.4203/ijrt.6.4.4 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Carvalho, J. Milho, J. Ambrosio, "Multi-Objective Optimisation of Railway Vehicle Seating Design for Passive Safety Improvement", International Journal of Railway Technology, 6(4), 69-88, 2017. doi:10.4203/ijrt.6.4.4 Keywords: injury biomechanics, railway crashworthiness, simulation, optimisation. Abstract This paper presents a multiobjective optimisation problem formulation for the identification of the seating layout design parameters for the coach interior safety during the crash of railway vehicles. The optimal problem is defined by the minimization of the relevant injury criteria for railway passengers that leads to a set of design solutions that are searched using a multiobjective genetic algorithm. The evaluation of the objective functions is based on the use of surrogate response surface functions instead of using directly the dynamic analysis. The only real costs involved in the methodology presented reside on the number of analysis with the detailed model required to identify the quadratic surface parameters, this number always being smaller than the number of iterations taken in any optimisation process. The results show that the optimal designs of the interior seating layout are obtained with relevant decreases of the injury indices and it is also observed that the difference between the injury indices evaluated using the surrogate model are in weighted average less than 5% different from those calculated with the realistic detailed model. purchase the full-text of this paper (price £25) go to the previous paper return to the table of contents return to IJRT purchase this issue (price £80 +P&P)
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