Interval combination method of time domain finite element analysis for gyroscopic systems

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (14) : 75-79.

SUI Yongfeng1,2,3,4，PAN Huibin1,3,4，SUI Yi3,4，ZHONG Wanxie2

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Abstract

Based on the variational principle, time domain finite element method of gyroscopic systems is presented and applied to gyroscopic rotor dynamics. The corresponding trial function matrix, element stiffness matrix and inhomogeneous force are given. The interval combination method of time domain FEM is subsequently proposed which has higher efficiency. This method inherits the property of symplectic conservation and enhances computational accuracy. The examples comparing the numerical results obtained from different methods: time domain FEM and Newmark method demonstrate the advantages of time domain FEM.

Key words

Time domain FEM / Symplectic / Gyroscopic system / Rotor dynamics

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SUI Yongfeng1,2,3,4，PAN Huibin1,3,4，SUI Yi3,4，ZHONG Wanxie2. Interval combination method of time domain finite element analysis for gyroscopic systems[J]. Journal of Vibration and Shock, 2020, 39(14): 75-79

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