动车组车轮多边形磨耗发展历程模拟及车轮粗糙度的影响

Research on Development Process Simulation and Influencing Factors of Polygonal Wear of High-speed Train Wheels

将车辆/轨道耦合动力学模型与Archard磨耗模型相结合,建立长期磨损迭代模型,用以模拟动车组运行时车轮多边形的整个发展历程。模拟动车组以速度为250、300 km/h运行时车轮多边形的发展历程,结果与实际情况吻合,验证了模型的正确性。使用频率计算公式得出车轮多边形激励频率约为580 Hz,说明在轮对与钢轨之间存在一个固定的振动频率,这个振动频率促进了车轮多边形的产生和发展。对比分析车轮粗糙度对车轮多边形的影响,结果表明,提高镟修质量可以减缓多边形的增长速度。

This paper combined the vehicle-track coupling dynamics model with the Archard wear model to establish a long-term wear iteration model to simulate the entire development process of the wheel polygon during the operation of the EMU.The development process of the wheel polygon of the EMU running at 250 km/h and 300 km/h was simulated.The results are consistent with the actual situation,verifying the correctness of the model.Using the frequency calculation equation,the excitation frequency of the wheel polygon obtained is about 580 Hz,which indicates a fixed vibration frequency existing between the wheelset and the rail,and this vibration frequency promotes the development of the wheel polygon.The influence of wheel roughness on the wheel polygon was comparatively analyzed.The results show that improving the re-profiling quality can slow down the growth of polygons.