为分析车轮多边形磨耗主导阶数的发展对车桥耦合振动系统响应的影响，针对多边形磨耗主导阶数的关键影响因素及发展规律进行归纳总结，采用ANSYS和SIMPACK联合仿真方法，建立列车—桥梁耦合动力学模型，分别探讨在不同运营里程、列车运营速度、扣件垂向刚度和轮径变化下车轮多边形磨耗主导阶数的演变对车桥耦合系统振动响应的影响规律。研究结果表明：车轮多边形磨耗主导阶数的演变对车桥耦合系统动力响应的影响显著。整体来讲，当车轮发生高阶多边形磨耗时，桥梁跨中横向加速度和竖向加速度显著增大，列车轮轨垂向力和脱轨系数也明显增大且列车车轮出现瞬时跳动现象，对桥上高速列车运行的品质和桥梁结构的安全运营造成影响，需要及时对车轮进行镟修工作。

In order to analyze the influence of evolution of the dominant order of wheel polygonal wear on the vibration response of the train-bridge coupling system, the key influencing factors and evolution patterns of the dominant order of polygon wear were summarized first. Meanwhile, the coupled dynamic model of the train-bridge system was established by utilizing a combined simulation approach with ANSYS and SIMPACK. Subsequently, the impact of evolution of the dominant order of wheel polygonal wear on the vibration response of the train-bridge coupled system under different operational mileages, train operating speeds, vertical stiffness of fasteners, and variations in wheel diameter, was explored. The research results indicate that the evolution of the dominant order of wheel polygonal wear significantly affects the dynamic response of the train-bridge coupled system. In general, when the wheels experience high-order polygonal wear, the lateral and vertical accelerations at the mid-span of the bridge increase significantly. Moreover, the wheel-rail force and derailment coefficient also increase significantly, with the train wheels experiencing momentary bouncing. This has an impact on both the quality of high-speed train operation on the bridge and the safe operation of the bridge structure, necessitating timely wheel re-profiling.