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M. Carvalho¹ and J. Milho^2,3

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

Keywords: railway, crashworthiness, passive safety, simulation, injury, biomechanics.

Abstract

The study presented here concerns a parametric study for the analysis of the influence of backrest table design during crashes of railway vehicles, focusing on the protection of occupants of railway coach interiors. A railway accident is described by the primary collision, in which the vehicle is subjected to an abrupt deceleration causing the unrestrained occupants to continue the original motion. Then the occupants are projected through the vehicle until the secondary collision occurs with their contact with some part of the interior of the vehicle or with other occupants. The strategy presented here combines and explores the already developed railway structures for crashworthiness with injury biomechanics. The methodology attends the railway accidents specificities such as the inexistence of restraints and the larger distance between contact features, which decreases the predictability on the kinematics of the occupants. Due to the importance of the vehicle interior features for the potential injury of the occupants during the secondary collision, in particular the seating layout with backrest table for which the experimental sled tests were not performed due to its cost, a parametric study was conducted with a numerical model of a reference simulation scenario characterized by the seating pitch of the first class coach. Simulation results suggest design modifications that are discussed in the scope of the reduction of the biomechanical injury indices for the occupants.

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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 1, 2017 Injury Biomechanics in Railway Backrest Table Design M. Carvalho¹ and J. Milho^2,3 ¹UNIDEMI, Department of Mechanical and Industrial Engineering Faculty of Science and Technology, Universidade NOVA de Lisboa, Portugal ²IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal ³ CIMOSM, ISEL, Instituto Superior de Engenharia, Instituto Politécnico de Lisboa, Lisbon, Portugal doi:10.4203/ijrt.6.1.1 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Carvalho, J. Milho, "Injury Biomechanics in Railway Backrest Table Design", International Journal of Railway Technology, 6(1), 1-21, 2017. doi:10.4203/ijrt.6.1.1 Keywords: railway, crashworthiness, passive safety, simulation, injury, biomechanics. Abstract The study presented here concerns a parametric study for the analysis of the influence of backrest table design during crashes of railway vehicles, focusing on the protection of occupants of railway coach interiors. A railway accident is described by the primary collision, in which the vehicle is subjected to an abrupt deceleration causing the unrestrained occupants to continue the original motion. Then the occupants are projected through the vehicle until the secondary collision occurs with their contact with some part of the interior of the vehicle or with other occupants. The strategy presented here combines and explores the already developed railway structures for crashworthiness with injury biomechanics. The methodology attends the railway accidents specificities such as the inexistence of restraints and the larger distance between contact features, which decreases the predictability on the kinematics of the occupants. Due to the importance of the vehicle interior features for the potential injury of the occupants during the secondary collision, in particular the seating layout with backrest table for which the experimental sled tests were not performed due to its cost, a parametric study was conducted with a numerical model of a reference simulation scenario characterized by the seating pitch of the first class coach. Simulation results suggest design modifications that are discussed in the scope of the reduction of the biomechanical injury indices for the occupants. purchase the full-text of this paper (price £25) go to the previous paper go to the next paper return to the table of contents return to IJRT purchase this issue (price £80 +P&P)
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