吸能列车与障碍物撞击过程的研究和分析

Analysis of Collision Between Energy-absorbing Train and Barrier

根据第二类Lagrange方程 ,导出轨道列车撞击动力学微分方程 ;对吸能列车与障碍物发生撞击事故的过程进行模拟 ;分析在撞击过程中各车辆产生塑性变形的程度、列车及各车辆的吸能情况以及参与产生塑性大变形的车辆数 ;确定出车辆间的撞击力、撞击作用时间、以及各车的速度、加速度等一系列参数 .研究结果为设计耐冲击吸能车辆及如何减少列车碰撞事故造成的损失提供科学依据 .

In the light of Lagrange's equation,the differential equations of the train collision dynamics were educed.By the simulating process of collision accident occurred between energy absorbing train and barrier,such items in collision process like the plastic deformation of vehicles,the absorbing energy by the train and the compartments,the number of vehicles produced large plastic deformation were analyzed.And a series of parameters were obtained,e·g the impact force,the velocity,the acceleration and the time of the compartments.These investigating conclusions can present a foundation for the design of crashworthy energy absorbing car body along with the way to reduce the losses resulted from train collisions.