目的 研究高速列车车轮多边形磨耗的形成机理以及轮轨系统结构参数对车轮多边形磨耗的影响。 方法 基于轮轨间蠕滑力饱和引起轮轨系统摩擦自激振动从而导致车轮多边形磨耗的理论，建立了包含车轮、钢轨、轨枕和道床的实体模型，然后导入到有限元软件 ABAQUS 中，钢轨和轨枕之间采用点对点的无质量弹簧阻尼单元组进行模拟，轨枕和道床之间采用绑定约束连接，道床底部支撑采用点对地的无质量弹簧阻尼单元组。采用复特征值方法研究高速线路上发生制动滑动时轮轨系统的运动稳定性。结果 在饱和蠕滑力的作用下，高速线路轮轨系统产生的不稳定振动频率为 f=495.01 Hz，列车轮对容易产生 18 阶多边形磨耗。在一定范围内，扣件的垂向刚度对抑制车轮多边形磨耗影响较小，适当提高扣件的垂向阻尼，可以有效抑制轮轨系统的摩擦自激振动，从而达到抑制车轮多边形磨耗的目的。不同偏心形式对轮轨系统不稳定振动几乎没有影响。结论 在高速线路上，列车制动滑动容易引起车轮多边形磨耗，适当提高钢轨扣件的垂向阻尼，可有效抑制车轮多边形磨耗。

The work aims to study the formation mechanism of the polygonal wear of high-speed train wheels and the effect of wheel-rail system structural parameters on the wheel polygonalization. Based on the theory that wheel-rail system frictional self-excited vibration caused by the saturated wheel-rail creep force could lead to wheel polygonal wear, a solid model including wheel, rail, sleepers and track beds was established. The solid model was imported into the finite element software ABAQUS. The rail and sleepers were simulated by point-to-point massless spring damping unit and the sleeper and the track bed were connected by binding constraint. Then the point-to-ground massless spring damping unit was used as the bottom support of the track bed. The stability of the wheel-rail system when the brake slip occurred on the high-speed railway lines was studied by the complex eigenvalue method. Under the effect of saturated creep force, the unstable vibration frequency of the wheel-rail system was f=495.01 Hz, the wheel was prone to generate 18-degree polygonalization. Within a certain range, the vertical stiffness of the fastener did not play a significant role in suppressing the wheel polygonalization. In order to suppress the wheel polygonalization, properly increasing the vertical damping of the fastener can suppress the frictional self-excited vibration of the wheel-rail systemeffectively. Different eccentric forms hardly had effects on the unstable vibration of the wheel-rail system. On a high-speed line, the braking slippage of the train can easily cause the wheel polygonalization. The wheel polygonalization can be effectively restrained by raising the vertical damping of the fastener.