Wheel polygonal wear has long been a problem that confused the safety of railway operation which has important theoretical value and research significance. In this paper, the conditions of polygonal wear of high-speed wheel are analyzed based on the wear model and verified by the field measured data. Considering the wheel track interaction caused by rotation, a finite element model of wheelset rotor dynamics is established. The effects of rotor speed, mass eccentricity, wheelset, and track flexibility on the vibration characteristics of wheelset rotor system and wheel polygonal wear characteristics are analyzed by beam element and solid element, respectively. The results show that the wheel longitudinal vibration is the main reason of wheel polygonal wear, and the wheel polygonal wear follows the law of “constant frequency and divisible.” Its “constant frequency” comes from the wheel track contact vibration, which stimulates the third-order vertical bending vibration of wheelset and the eighth-order coupled bending vibration of track, and the order is equal to the ratio of “constant frequency” to the wheelset rotation frequency.

中文翻译：

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高速车轮多边形磨损的产生与演化条件

车轮多边形磨损长期以来一直是困扰铁路运营安全的问题，具有重要的理论价值和研究意义。本文基于磨损模型对高速车轮多边形磨损情况进行分析,并通过现场实测数据进行验证。考虑旋转引起的轮距相互作用，建立了轮对转子动力学有限元模型。分别采用梁单元和实体单元分析了转子速度、偏心距、轮对和轨道柔度对轮对转子系统振动特性和轮多边形磨损特性的影响。结果表明，车轮纵向振动是车轮多边形磨损的主要原因，车轮多边形磨损遵循“定频可整除”规律。