The widespread faults that occur in railway wheels and can cause a massive dynamic impact are the wheel tread flat. The current work considered changes in vehicle speed or wheel radius deviation and studied the dynamic impact load. The modal technique for the impact evaluation induced by the wheel flat was proposed via the finite element analysis (FEA) software package ANSYS, integrated into a multibody dynamics model of the high-speed train CRH2A (EMU) through SIMPACK. The irregularity track line has developed and depends on the selected simulation data points. Additionally, a statistical approach is designed to analyze the dynamic impact load response and effect and consider different wheel flat lengths and vehicle speeds. The train speed influence on the flat size of the vertical wheel-rail impact response and the statistical approach are discussed based on flexible, rigid wheelsets. The results show that the rigid wheel flat has the highest vertical wheel impact load and is more significant than the flexible wheel flat force. The consequences suggest that the wheelset flexibility can significantly improve vertical acceleration comparably to the rigid wheel flats. In addition, the rendering of the statistical approach shows that the hazard rate, PDF, and CDF influence increase when the flat wheel length increases.

中文翻译：

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柔性-刚性轮对由于车轮踏面引入了动态效果

发生在铁路车轮中并可能导致巨大动态冲击的广泛故障是车轮踏面平整。目前的工作考虑了车速或车轮半径偏差的变化，并研究了动态冲击载荷。通过有限元分析（FEA）软件包ANSYS提出了车轮扁平引起的冲击评估的模态技术，并通过SIMPACK集成到高速列车CRH2A（EMU）的多体动力学模型中。不规则轨道线已经形成并取决于所选的模拟数据点。此外，还设计了一种统计方法来分析动态冲击载荷响应和影响，并考虑不同的车轮扁平长度和车速。基于柔性、刚性轮对讨论列车速度对垂直轮轨冲击响应平面尺寸的影响和统计方法。结果表明，刚性车轮扁平面具有最高的垂直车轮冲击载荷，并且比柔性车轮扁平力更显着。结果表明，与刚性轮平面相比，轮对灵活性可以显着提高垂直加速度。此外，统计方法的渲染表明，随着扁平轮长度的增加，危险率、PDF 和 CDF 的影响也会增加。结果表明，与刚性轮平面相比，轮对灵活性可以显着提高垂直加速度。此外，统计方法的渲染表明，随着扁平轮长度的增加，危险率、PDF 和 CDF 的影响也会增加。结果表明，与刚性轮平面相比，轮对灵活性可以显着提高垂直加速度。此外，统计方法的渲染表明，随着扁平轮长度的增加，危险率、PDF 和 CDF 的影响也会增加。