Discrete Dynamics in Nature and Society
Volume 2012 (2012), Article ID 927592, 11 pages
Research Article

A Numerical Model for Railroad Freight Car-to-Car End Impact

School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China

Received 11 September 2012; Revised 9 November 2012; Accepted 21 November 2012

Academic Editor: Wuhong Wang

Copyright © 2012 Chao Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A numerical model based on Lagrange-D'Alembert principle is proposed for car-to-car end impact in this paper. In the numerical model, the friction forces are treated by using local linearization model when solving the differential equations. A computer program has been developed for the numerical model based on Runge-Kutta fourth-order method. The results are compared with the Multibody Dynamics/Kinematics software SIMPACK results and they are close. The ladings' relative displacement to struck car and the relative displacement between two ladings get larger as impact speed increases. There is no displacement between two ladings when the contact surfaces have the same friction coefficient.