高速动车组车轮多边形对车内噪声的影响

高速动车组在运行过程中车内会出现异常噪音的问题。通过对国内某型高速动车组车轮镟修前后，车内噪声和车轮粗糙度进行测试。对比分析镟修前后车内噪声频谱特性和车轮多边形特征，发现异常噪音车辆的对应的车轮均存在严重的多边形特征，镟修后车轮多边形特征明显改善，车内噪声值明显降低。研究结果表明，车轮多边形是造成车内异常噪音的主要原因，通过噪声测试能够一定程度上监测车轮多边形程度，镟修是目前解决高速动车组车内异常噪音最有效的方法。本研究对监控车轮多边形，防止严重的车轮多边形对高速动车组车辆造成更严重的影响起到重要作用。

Influence of Polygonal Wheels on Interior Noise of High-speed Trains

Abstract: Abnormal noise generates in coach when high-speed trains operate. The tests of noise in the coaches and roughness of the corresponding wheels were carried out before and after re-profiling of wheels. Through analysis the different characters of noise and roughness before and after re-profiling of wheels, it was found that the coaches which noise were abnormal, the corresponding wheels were serious polygonal. The polygonal wheels were improved and the level of interior noise was reduced after re-profiling of wheels. That polygonal wheel was the main reason to cause abnormal noise inside the coaches. The result of study indicates that the abnormal noise is caused by the serious polygonal wheels. The level of polygonal wheels can be monitored to some extent by the measurement of noise. The most effective method to solve the abnormal noise is re-profiling of wheels. The conclusion plays an important role to monitor polygonal wheel and prevent worse influence to high-speed trains due to serious polygonal wheels.