地铁牵引电机气动噪声仿真关键因素研究

Research on Key Factors of Aerodynamic Noise Simulation of Metro Traction Motor

为了研究地铁牵引电机气动噪声仿真关键因素,提高气动噪声仿真精度,以1台自通风地铁牵引电机为例,基于ACTRAN软件对不同声学网格尺寸、声源区噪声向自由场中辐射的插值阶次以及当地温湿度下空气介质属性等参数进行仿真对比分析。对比仿真结果与试验结果,验证关键参数对气动噪声仿真精度和效率的影响,为更准确、高效的牵引电机噪声仿真计算提供依据。

In order to study the key factors of aerodynamic noise simulation of the metro traction motor and improve the simulation accuracy of aerodynamic noise,simulation comparison and analysis are performed with a self-ventilated metro traction motor as an example using ACTRAN software.The factors considered include the acoustic mesh size,the interpolation order of noise radiation from source region to the infinite field,and the properties of air medium under local temperature and humidity conditions.Then the simulation results are compared with the experiment results,which verifies the influence of key factors on the precision and efficiency of aerodynamic noise and provides a basis for more accurate and efficient simulation calculation of traction motor noise.