并应用有限元法对变幅杆进行了模态分析，得到了共振频率和位移节点等重要参数。
Normal modes in the pole and important characteristic parameters such as resonance frequency and position of the displacement node are obtained using the finite element method.
利用有限元分析软件ANSYS对这种结构进行模态分析，得到其共振频率和一阶振动图；
Then the new structure is simulated with modal analysis by finite element analysis software ANSYS, and the resonant frequency and the first vibration map are presented.
再用有限元软件ANSYS进行模态分析，确定了共振频率。
Finally, the modal analysis is obtained and the resonance frequency is determined by using finite element software ANSYS.
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