基于列车碰撞平台的不同编组长度碰撞分析

COLLISION ANALYSIS OF DIFFERENT TRAIN SETTING BASED ON TRAIN COLLISION PLATFORM

为了研究不同编组长度列车的碰撞响应结果,本文基于翟方法,建立了列车一维纵向碰撞仿真平台,将相同编组列车有限元仿真得出的速度和能量等碰撞响应与一维纵向碰撞平台的结果进行对比,验证了一维纵向碰撞仿真平台的准确性.在此基础上,基于该平台,以车辆的速度、加速度以及吸收的能量作为分析指标,研究主动列车与被动列车在相同编组与不同编组工况下的碰撞响应.研究结果表明,当主动车编组长度相同时,碰撞结束的速度会随着编组长度的增加而降低,吸能量占比随着编组长度的增加而增加.当主动车编组长度大于被动车时,此时碰撞所吸收的能量较少,剩余动能较大,碰撞会更危险.

In order to study collision response of trains with different train lengths,a one-dimension longitudinal collision simulation platform is established based on the Zhai method.The one-dimensional longitudinal collision simulation platform is validated by comparing impact responses of the same train grouping,such as speed and energy,with results of the one-dimension longitudinal collision simulation platform.On the basis of this platform,the collision responses of active and passive trains under the same and different train setting conditions are studied by taking the speed,acceleration and absorbed energy of the vehicle as the indexes.The results demonstrate that when the train setting length of the active vehicle is the same,the velocity at the end of the collision will decrease with increased train setting length,and the energy absorption ratio will increase with increased train setting length.When the length of the active vehicle is longer than that of the passive vehicle,the energy absorbed by the collision is less and the remaining kinetic energy is larger,thus meaning that the collision will be more dangerous.