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Modeling Method for the Force and Deformation Curve of Energy Absorbing Structures to Consider Initial Collapse Behaviour in Train Crash  

Kim, Joon-Wo (Department of Rolling Stock System, Seoul National University of Technology)
Koo, Jeong-Seo (Department of Rolling Stock System, Seoul National University of Technology)
Lim, Jong-Soon (Technical Center, ILJIN Global)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.18, no.3, 2010 , pp. 116-126 More about this Journal
Abstract
The Korean rolling stock safety regulation stipulates that the collision deceleration of a car body should be maintained under average 5g and maximum 7.5g during train collisions. One-dimensional dynamic model of a full rake train, which is made up of nonlinear springs/bars-dampers-masses, is often used to estimate the collision decelerations of car bodies in a basic design stage. By the way, the previous studies have often used some average force-deformation curve for energy absorbing structures in rolling stock. Through this study, we intended to analyse how much the collision deceleration levels are influenced by the initial peak force modeling in the one-dimensional force-deformation curve. The numerical results of the one-dimensional dynamic model for the Korean High-Speed Train show that the initial peak force modeling gives significant effect on the collision deceleration levels. Therefore the peak force modeling of the force-deformation curve should be considered in one-dimensional dynamic model of a full rake train to evaluate the article 16 of the domestic rolling stock safety regulations.
Keywords
Force and deformation curve; Collision acceleration; Rolling stock; Energy absorbing structure; Initial peak force; Average force;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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