地铁工程车碰撞仿真中钩缓及防爬器模拟方法

Simulation Method for Coupler Buffer and Anti-creeper in Collision Calculations of Subway Engineering Vehicle

在进行某型号地铁工程车碰撞分析时,提出了一种基于LS-DYNA非弹性压缩弹簧模拟钩缓特性以及防爬器吸能特性的仿真方法。就两相同列车以相对速度25km/h相撞为例,对碰撞过程进行模拟,并计算钩缓装置以及防爬器对列车碰撞工况能量吸收的贡献程度。结果表明:该方法能够模拟碰撞时列车钩缓装置和防爬器的力学特性,并且能得到列车碰撞的输出特性、能量吸收等指标;两列车对撞后,两工程车前端的车钩缓冲器吸收能量0.51 MJ,防爬器吸收能量0.47 MJ,分别占总能量的34%和31%。

In this paper,a simulation method based on non-elastic compression spring in Ls-dyna for studying characteristics of coupler buffer and anti-creeper is proposed in the analysis of collision calculations of subway engineering vehicles.The collision process was simulated between two identical subway trains under a scenario with a relative speed of 25 km/h,and the contribution of coupler buffer and anti-creeper in the total energy absorption of the train collision was analyzed.The results show that this method can simulate the mechanical characteristics of coupler buffer and anti-creeper in the collision,and the output characteristics and energy absorption of the collision can be obtained;after the collision of the two trains,the coupler buffer in front of the two subway engineering vehicles absorbed 0.51 MJ and the anti-creeper absorbed 0.47 MJ,which accounted for 34% and 31% of the total energy respectively.