Modal reanalysis methods for structural large topological modifications with added degrees of freedom and non-classical damping
作者： JJ He , JS Jiang , B Xu , None
DOI: 10.1016/J.FINEL.2007.09.003
关键词: Topology 、 Mathematics 、 Finite element method 、 Convergence (routing) 、 Orthogonality 、 Inverse iteration 、 Degrees of freedom (statistics) 、 Rayleigh quotient 、 Iterative method 、 Modal analysis
摘要: This paper presents two new methods for modal reanalysis of structures considering large topological modifications with added degrees freedom. Firstly, a quite simple and efficient approximate method the improved dynamic condensation, Kirsch approximation decoupling mass orthogonality is proposed real modes; then, high-quality which comprised complex eigensubspace condensation technique Rayleigh-quotient inverse iteration modes structural modifications. The convergence iterative improvement will be achieved after only or three cycles. Four numerical examples illustrate that are effective high precision.
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