个性化道岔廓形打磨对动车组动力学性能影响

Research on the Influence of Personalized Turnout Rail Grinding on the Dynamic Characteristic of High-Speed Trains

选取徐兰高铁1组道岔作为研究对象,采取个性化道岔钢轨廓形打磨,分析打磨前后轮轨几何关系,并建立车辆-道岔耦合无砟轨道系统动力分析模型,研究对比打磨前后高速列车动力学特性。结果表明:通过个性化钢轨打磨道岔后,道岔钢轨左右股较为对称,轮轨等效锥度得到优化;列车通过道岔时,轮轨横向力峰值、轮轨磨耗功峰值均显著降低,列车轮轨作用力得到改善;轮重减载率峰值、脱轨系数峰值及轮轨横移量峰值均降低,列车安全性得到显著提升;车体横/纵向加速度峰值及构架横/纵向加速度峰值均降低,列车运行稳定性得到提升。

By selecting turnouts of Xuzhou-Lanzhou high-speed railway as the research object and applying the personalized turnout rail grinding,this paper analyzes the grinding wheel/rail geometry characteristics and explores the dynamic characteristics of high-speed trains before and after grinding.The results show that,with personalized turnout rail grinding,the left and right side of the turnout rail are symmetrical,and the wheel/rail equivalent conicity is improved.Moreover,when the train passes through the turnouts,the peak value of wheel-rail lateral force and the peak value of wheel-rail abrasion power are significantly reduced,and the train wheel/rail force is improved.The peak value of load reduction rate,the peak value of derailment coefficient and the peak value of wheel/rail lateral movement are all reduced,and the train safety is significantly improved.When the peak value of the vehicle body transverse/longitudinal acceleration and the peak value of the frame transverse/longitudinal acceleration are decreased,and the stability of the train operation is improved.