Dynamic analysis method of an anisotropic and asymmetric rotor-bearing system based on 3D FEM

被引：0

作者：

Ma, Wei-Meng ^{[1
]}

Wang, Jian-Jun ^{[1
]}

机构：

[1] School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2014年 / 33卷 / 23期

关键词：

3D finite element; Asymmetric; Rotor-bearing system; Stability; Time-varying system;

D O I：

10.13465/j.cnki.jvs.2014.23.002

中图分类号：

学科分类号：

摘要：

Dynamic analysis method of an anisotropic and asymmetric rotor-bearing system based on 3D finite element method was presented. The system mass, stiffness and Coriolis force matrices expressed with respect to a rotating coordinate system were generated with ANSYS. Time-varying bearing stiffness matrix with respect to the rotating coordinates was then obtained with a coordinate transformation. The differential equations of motion of the system were generated by applying constraints and time-varying bearing stiffness to the system matrices using the corresponding relationships between node number and row index of the matrices. Floquet theory and Hill infinite determinant method were adopted to solve the differential equations, frequency characteristics and stability of the system were obtained. The proposed method was validated based on a model in literature, and the proposed method was applied to analyze the dynamic behavior of an industrial rotor considering anisotropic and asymmetric characters. ©, 2014, Chinese Vibration Engineering Society. All right reserved.

引用

页码：9 / 14and36

页数：1427

共 23 条

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