声学风洞中的高速列车模型气动噪声试验研究

研究借助气动-声学风洞试验平台，首先针对某高速列车的1：8缩尺比例的三车编组模型建立了气动噪声试验方法和突显不同的噪声源的模型处理方法，并结合流场外自由场传声器和传声器阵列的测量结果，分析了模型上的主要噪声源特性及对整个模型的贡献量大小。研究表明：转向架和受电弓噪声是模型的最主要噪声源，其次是车连接部位间隙，再次是鼻尖和排障器，最后是尾车，同时，并给出了这些噪声源的特性，这对于认识高速列车气动噪声和改善设计有重要的参考价值。研究也说明所提出的试验研究方法是一种研究高速列车气动噪声较为有效地方法。

Testing study of aerodynamic noise for high speed train model in aero-acoustic wind tunnel

A testing method of aerodynamic noise for 1：8 scale high-speed train model in an aero-acoustic wind tunnel and the treatment way to highlight the different noise sources of the model were established in this study. The characte- ristics of the major noise sources and its contribution to the model were analyzed according to the measurement results from the microphones and microphone array out of the flow field. The results showed that the bogie and pantograph are the major noise sources, followed by the gap between the two carriages, then the tip and cowcatcher, and finally the tail car. Meanwhile, the characteristics of the noise sources were put forward, which is important to understand the aerodynamic noise and improve the design of high speed train. The results also demonstrated that the proposed testing method was effective for studying the aerodynamic noise of high speed train.