耦合物理场下的电机振动噪声分析
Analysis of Motor Vibration and Noise in Coupled Physical Fields

本文通过有限元仿真技术在物理耦合场中进行电机振动，噪声的仿真分析。首先通过Maxwell进行电机在转速1500 r/min得工况下，仿真得出电磁力密度，经过转换得到频域下得电磁激振力。接着用ANSYS进行模态分析，确定得电机定子的一阶固有频率为1632.5 Hz，并求出前六阶固有频率以及模态振型。然后将电磁激振力作为远程载荷结合模态分析，进行了谐响应分析，得出一阶固有频率的振幅。最后通过噪声分析，确定了在频率为2000 Hz时的噪声为30.723 dBA。本文的仿真工作为电机减振降噪的设计优化提供了完整的分析流程。
This article uses finite element simulation technology to simulate and analyze motor vibration and noise in a physically coupled field. Firstly, Maxwell was used to simulate the electromagnetic force density of the motor at a speed of 1500 r/min, and the electromagnetic excitation force in the fre-quency domain was obtained through conversion. Next, modal analysis was conducted using ANSYS to determine the first-order natural frequency of the motor stator as 1632.5 Hz, and the first six natural frequencies and modal shapes were calculated. Then, the electromagnetic excitation force was used as a remote load combined with modal analysis to perform harmonic response analysis and obtain the amplitude of the first natural frequency. Finally, through noise analysis, it was de-termined that the noise at a frequency of 2000 Hz was 30.723 dBA. The simulation work in this ar-ticle provides a complete analysis process for the design optimization of motor vibration and noise reduction.