兆瓦级风力发电机组变桨机构桨叶盘的模态分析

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The modal analysis of a MW-tevel aerogenerator blade bearing system was done by finite element method, and its vibration models and first five natural frequencies under the rated speed were obtained. The frequency region in which resonance is apt to occur was found. It can offer theoretical proofs for improvement of accuracy and stability of pitch.利用有限元分析软件ANSYS对某型号兆瓦级风力发电机桨叶轴承系统进行了模态分析，通过计算得到额定转速下桨叶盘的振型和前5阶固有频率，找到工作中容易发生共振的频率区域，为进一步提高变桨精度和变桨平稳性提供了理论依据。