基于逐级吸能原理的地铁B型车耐撞性分析

基于逐级吸能原理,建立了地铁B型车的非线性大变形碰撞动力学有限元力学模型,应用LS-DYNA非线性大变形分析软件,对两列列车碰撞情形进行了数值模拟分析。研究结果表明:列车结构设计符合逐级吸能原理的要求,仅吸能装置和部分车体端部结构产生了塑性变形,客室结构区域纵向长度的最大变化值均小于其总长的1%,乘客的生存空间可以得到保障,且列车间不会发生爬车现象。

Analysis of B-type Subway Train Crashworthiness Based on Step-by-step Energy Absorption Principle

Based on the principle of step-by-step energy ab-sorption,a finite element model of nonlinear large deformation collision dynamics for B-type subway train is established. LS-DYNA nonlinear large deformation analysis software is used to conduct a detailed numerical simulation of the collision be-tween two trains. The results show that the design of the train is in accordance with the requirements of the step-by-step en-ergy absorption principle,plastic deformation is only observed in energy absorption device and part of the train. The maxi-mum change of the longitudinal length of the passenger com-partment structure area is less than 1% of the total length of the train energy structure,thus the living space for passengers can be guaranteed,there will be no climbing of one train on another at the same time.