车辆–钢弹簧浮置板轨道相互作用动力特性研究

Study on Dynamic Characteristics of Train-Steel Spring Floating-Slab Track Interactions

摘要: 基于车辆–轨道耦合动力学理论，建立车辆–钢弹簧浮置板轨道动力相互作用空间模型，分析了车辆在通过钢弹簧浮置板轨道时系统的振动特性。结果表明：与车辆定长对应的荷载和浮置板接缝处的刚度变化，对相互作用系统存在周期性激励；车辆与浮置板没有发生共振情况；轮轨相互作用在40 H~100 H频带范围内比较明显，并随着钢弹簧垂向支承刚度的减小而增强；车体和轨道板的振动随着钢弹簧垂向支承刚度的减小而增加。

Abstract: Based on the vehicle-track coupling dynamics theory, a spatial dynamic model of train-steel-spring floating-slab track interaction is established, and the vibration characteristics of train passing through the steel-spring floating-slab track are analyzed. The results show that the interaction system is periodically stimulated by the change of stiffness at the joint of floating-slab and by the load corresponding to vehicle distance. There is no resonance between the vehicle and the floating-slab. The wheel-rail interaction is obvious in the frequency range of 40~100 H, and increases with the decrease of the vertical support stiffness of the steel spring. The vibration of the car body and the slab increases with the decrease of the vertical support stiffness of the steel spring too.