Crashworthiness Simulation of Urban Rail Vehicles Based on ASME Standard

Abstract

Based on ASME standard and technical conditions of vehicle bidding document, the crashworthiness of an urban rail vehicle is simulated by software HyperMesh and LS-DYNA. The collision simulation model applies braking force through beam elements to simulate the emergency braking status of the vehicle during the collision. The longitudinal stiffness gradient design evaluation of the carbody structure is realized by simulation analysis of the overall longitudinal impact. The crashworthiness of the train is evaluated from the aspects of energy absorption, longitudinal acceleration of the vehicle, climbing and derailment, longitudinal stiffness of the carbody structure, etc. The simulation results show that the crashworthiness of the urban rail vehicle meets the corresponding technical requirements. At the same time, a simulation method of vehicle braking behavior and the verification procedure of longitudinal stiffness gradient design of carbody structure are proposed.