车辆系统的多个蛇行运动

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (11) : 200-205.

论文

车辆系统的多个蛇行运动

高学军1 ，李映辉2, 关庆华3

作者信息 +

Multiple Hunting Motions in a Railway Vehicle System#br#

GAO Xue-jun1, LI Ying-hui2, GUAN Qing-hua3

Author information +

文章历史 +

摘要

采用升速法和降速法对复杂非线性轮轨接触关系下车辆系统的分岔行为进行研究，发现系统存在运动幅值相差不大的两个蛇行运动解并存的现象，这种多个蛇行运动解并存的特性与一般的由单个亚临界Hopf分岔所引起的稳定定常运动与稳定蛇行运动并存的特性有所不同，很容易使车辆在相应速度附近运行时由于扰动的不同而使摆振幅值往复变化，影响车辆的正常安全运行，因此临界速度测定时需要在多种可能的激励条件下多次测试综合分析。

Abstract

The bifurcation behaviors of a railway vehicle system under complex nonlinear wheel-rail contact relation are investigated by the method of increasing and decreasing speed. It is found that two hunting motions with different amplitudes coexist. There are some difference between the coexistence of multiple hunting motions and the coexistence of the stable stationary equilibrium solutions and the stable hunting motions due to the single sub-critical Hopf bifurcation in the railway vehicle system. The coexistence of multiple hunting motions may easily cause the jump and back of the oscillating amplitude for the different kinds of disturbances. It greatly affects the normal and safe operation of the vehicle. Therefore, the critical speed should be determined through comprehensive analysis by various kinds of possible excitations and many times of tests.

导出引用

高学军1,李映辉2, 关庆华3. 车辆系统的多个蛇行运动[J]. 振动与冲击, 2015, 34(11): 200-205

GAO Xue-jun1, LI Ying-hui2, GUAN Qing-hua3. Multiple Hunting Motions in a Railway Vehicle System#br#[J]. Journal of Vibration and Shock, 2015, 34(11): 200-205

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