关键词: 声学, 高速动车组, 异常噪声, 多边形, 车轮粗糙度, 车轮镟修

Abstract:

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.