地铁车辆新型液气缓冲器冲击特性研究

Study on Impact Properties of New Hydro-Pneumatic Buffer for Metro Vehicle

为了保证地铁车辆安全提速,根据地铁缓冲器要求,设计了一种具有三段阻尼结构的新型液气缓冲器,建立了动力学计算模型。利用数值仿真方法,计算了静态特性曲线,结果表明可以满足列车稳态运行需要;在冲击动能一定的情况下,对不同冲击速度的动态特性曲线进行比较,并且通过参数调整使不同速度下的特性曲线接近矩形曲线,说明了参数调整依据及规律,可以使缓冲器受到较大速度的物体撞击时,具有较小的阻抗力。该缓冲器吸收率大于90%,能够适应地铁提速要求。

In order to ensure the safety of metro vehicles, according to the subway buffer requirements, a new type of hydro- pneumatic buffer with three sections of damping structure and established a dynamic model is designed. The static characteristic curve is calculated by numerical simulation method, result shows that the needs of steady state operation of trains can be met. In the case of constant impact energy, the dynamic characteristic curves of different impact velocity are compared and the characteristic curve which close to the rectangular by adjusting the parameters is obtained, the basis and law af parameter adjustment are explained. The buffer will possess a small resistance when the object hit it by larger speed. The absorption rate of buffer is more than 90%, so the requirements of subway speed can be adapted to.