高阶车轮多边形对无砟轨道及行车安全的动力影响

Dynamic effects of wheel polygon on ballastless tracks and driving safety

基于车辆-轨道耦合动力学理论,分析计算了15阶~22阶的车轮多边形对无砟轨道系统以及行车安全的动力影响,结果显示高阶车轮多边形对无砟轨道系统的振动以及扣件支反力的动力影响较为明显,同时对行车安全存在威胁,随着车速的提高以及多边形阶数和幅值的增加,轨道系统的动力响应随之增加。

Based on the vehicle-track coupling dynamics theory,the dynamic influence of 15 ~ 22 order wheel polygon on ballast-less track system and driving safety is calculated.The results showed that the influence of wheel polygon on the vibration of ballast-less track system and the reaction force of fastener is obvious and there is a great threat to driving safety.With the increase of trainspeed as well as the order and amplitude of wheel polygon,the dynamic response of ballastless track system increases.