风力发电机定子振动测试及响应分析

为了解决大型风力发电机组的振动和噪声问题，以某直驱型风力发电机为研究对象，使用加速度传感器对发电机定子在运行状态下的轴向加速度进行了测试。随后利用有限元软件建立等效模型，进行模态分析和响应分析，得到发电机定子的固有频率、振型和共振频率值，并将有限元仿真结果与测试结果进行分析。实测结果表明，在运行过程中，发电机定子在6点钟方向的轴向加速度远大于9点钟方向的轴向加速度，并且轴向加速度在发电机转速为9.5 r/min时达到峰值，模拟结果表明，发电机定子的响应频率为23 Hz，该频率为电机轴向加速度最大值相对应基频的3倍，并且在该频率下，发电机定子6点钟和9点钟方向的位移比值与实测加速度比值接近。该研究可为风力发电机的实际运行、振动测试和仿真模拟提供参考。

The Vibration Test and Response Analysis of Wind Power Generation Stator

In order to solve the vibration and noise problems of large-scale wind power generator, this paper takes a certain type of direct-drive wind power generator as the research subject. The axial acceleration of the wind power generator stator is tested by acceleration sensor when the generator is running, effective model of the wind power generator stator is established using finite element software. The natural frequency, mode shape and resonance frequency of the wind power generator stator can be obtained by modal analysis and response analysis, and the finite element simulation results and test results are analyzed. The measured results show that the axial acceleration of the wind power generator stator at 6 o'clock position is much greater than the axial acceleration at 9 o'clock position, and the axial acceleration reaches its maximum when the wind power generator rotates at 9.5 r/min. The simulation results show that the resonant frequency of the wind power generator stator is 23 Hz, which is three times the rotational frequency corresponding to the maximum axial acceleration. Under this frequency, the displacement ratio of the wind power generator stator at 6 o'clock position and 9 o'clock position is close to the measured acceleration ratio. The research can provide references for the actual operation, vibration test and simulation of wind turbines.