Abstract:

In order to study the influence of temperature characteristic of axle-box tumbler rubber node on vehicles dynamics performance, a series of test and dynamics simulation are accomplished. The experimental results show that the dynamic damping and dynamic stiffness of rubber node decrease with the increase of ambient temperature. Changes in the stiffness and damping of a rubber node will result in changes in the dynamic performance of the rail vehicle system. The simulation results show that the critical speed of the snake rises first and then decreases with the change of ambient temperature. Other dynamic properties, such as stability and safety index, change relatively complicated with the temperature rising.

摘要：

为了研究轴箱转臂定位橡胶节点的温变特性以及对车辆动力学性能的影响，对我国某高速动车组轴箱转臂定位橡胶节点进行高低温试验以及动力学仿真。试验结果表明，在固定振动频率与振动幅值条件下，橡胶节点的动态刚度与动态阻尼随温度的上升而下降。橡胶节点刚度与阻尼的变化会造成轨道车辆系统动力学性能的改变，仿真结果表明，蛇行临界速度随环境温度的上升先上升后下降，随着温度的上升，其它动力学性能如平稳性与安全性等指标变化相对复杂。

关键词: 振动与波, 橡胶节点, 温变特性, 动态刚度, 临界速度, 车辆动力学性能