关键词: 异步电机, 模态修正, 声振耦合, 多目标优化, 电磁力谐波

Abstract: For a specific model of asynchronous traction motor, a two-dimensional transient electromagnetic field model and a multi-physical field vibration response model utilizing the magnetic-solid coupling effect were established to realize the dynamic characteristic matching of electromagnetic-mechanical coupling system. The model parameters were calibrated by integrating modal testing with the modal assurance criterion (MAC) , and the electromagnetic vibration response is solved by using Maxwell stress tensor method and modal superposition method. Based on the acoustic boundary element method, the acoustic-vibration coupling model is constructed. The comparison between simulation and experiment shows that the error of acoustic power level is less than 1. 0 dB ( A) . The response surface method is used to optimize the electromagnetic force harmonics. The key parameters are selected by the central composite experimental design and variance analysis. Compared to the original design, the optimized solution reduced the maximum surface vibration acceleration by 0. 34 m / s2, the effective measure to reduce electromagnetic vibration was given, which provides theoretical support for the electromagnetic-mechanical collaborative design.

Key words: traction motor, modal correction, acoustic vibration coupling, multi-objective optimization, electromagnetic force harmonic