传统车辆模型与车辆-轨道耦合模型的垂向随机振动响应分析及比较

Comparison on Vertical Random Vibration Responses of Traditional Vehicle Model with Vehicle/Track Coupling Model

基于车辆轨道耦合动力学原理，运用随机振动理论进行了轮轨系统中传统车辆模型与车辆轨道耦合模型的垂向随机振动响应比较分析。结果表明，传统车辆模型仅适用于轮轨系统的低频振动分析，在研究高频振动时将产生大的误差；而车辆轨道耦合模型则可适用于轮轨系统整个频率带的随机振动分析。

Based on the theory of vehicle/track coupling dynamics and the theory of random vibration , the vehicle vertical random responses with the traditional vehicle model and with the vehicle/track coupling model are investigated and compared. It is shown that the traditional model is only fit to study low frequency vibrations of wheel/rail systems, and very serious errors will be produced when studying high frequency vibrations. The vehicle/track coupling model can be suitable for studying the wheel/rail system random vibration within total frequency domain.