高速列车不同转向架区噪声特性及主要噪声源分离

以某型高速列车为研究对象,基于线路运行类比测试,对车辆运行时主要噪声源之一的转向架区噪声开展研究。通过对不同转向架区噪声进行类比测试和对比分析,确定了350km·h-1及以下速度等级中间车拖车转向架区的主要噪声源为轮轨噪声,头、尾拖车转向架区主要噪声源为气动噪声,中间车动车转向架区主要噪声源为牵引系统噪声。基于以上的分析结论和一定的假设,对车头、车尾和中间动车转向架区主要噪声源进行了分离特性研究,获取了主要噪声源的频谱和贡献特性。研究结果可为高速列车减振降噪设计提供依据和指导。

Noise Characteristic and Main Noise Source Separation in Different Bogie Areas for High-speed Train

Based on some type of high-speed train, the different bogie area noise was tested and studied , which was one of the main noise sources of high-speed train in operation. Through the analogically test and analyze the noise characteristics in different bogies, it can be concluded that the main noise source in bogie areas of the intermediate trail car is wheel-rail noise at the speed level of 350km·h^-1 or below, the main noise source in bogie areas of the head and rear car is pneumatic noise, and the main noise source in bogie areas of the intermediate motor car is traction system noise. Furthermore, based on above results and some assumptions, the spectrum and contribution characteristics of major noise sources were studied and obtained for bogie areas of the head, rear and motor car. The research results can provide a basis and guidance for vibration and noise reduction of high-speed trains.