Abstract An abnormal phenomenal of rail corrugation was found in the transition and circular curve interval of the mountain city metro, in which the rail corrugation on the outer rail is more serious and earlier than that on the inner rail, and the wavelengths are also different. In the present article, the frictional self-excited oscillation of the wheel–rail system and the feedback vibration of the rail corrugation are considered comprehensively to study the mechanism of rail corrugation. According to the dynamic analysis of the vehicle track system on the high-incidence section of rail corrugation, finite element models of wheelset–track systems on the smooth track and wear track are established. Then, the unstable vibration mode and dynamic response of the wheelset–track system are calculated by complex eigenvalue analysis and transient dynamic analysis. The consistency of the numerical simulation and field test indicates that the generation of rail corrugation may be affected by the frictional self-excited vibration of the wheelset–track system. Furthermore, the feedback vibration induced by the previous rail corrugation not only aggravates the original rail corrugation but also induces new rail corrugation.

中文翻译：

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山城地铁曲线区间钢轨波纹异常现象机理研究

摘要 山城地铁在过渡段和圆曲线区间发现了一种异常的钢轨波纹现象，其中外轨的钢轨波纹比内轨的更严重、更早，波长也不同。本文综合考虑轮轨系统的摩擦自激振荡和钢轨波纹的反馈振动来研究钢轨波纹的产生机理。根据钢轨波纹高发生段车辆轨道系统的动力学分析，建立了光滑轨道和磨损轨道上轮对轨道系统的有限元模型。然后，通过复特征值分析和瞬态动力学分析计算轮对-轨道系统的不稳定振动模式和动态响应。数值模拟和现场试验的一致性表明，轮对-轨道系统的摩擦自激振动可能会影响钢轨波纹的产生。此外，先前的钢轨波纹引起的反馈振动不仅加剧了原有的钢轨波纹，而且还会诱发新的钢轨波纹。