基于气动噪声的列车车顶天线外形优化

Optimization of Contour of Antenna on Roof of the Train Based upon Aerodynamic Noise

基于Lighthill声类比理论建立了列车气动噪声模型,分别对采用原模型和优化模型车顶天线的列车气动噪声进行了数值计算,得到了列车的气动噪声源及远场气动噪声特性。

The aerodynamic noise model of the train is established on the basis of the Lighthill acoustic analogy theory,the digital calculation is made respectively for the aerodynamic noise of trains with roof antennae of the original model and the optimized model,and the aerodynamic noise source and the aerodynamic noise features in distant field of the train are obtained.