For repeated eigenvalues, the corresponding eigenvectors are degenerate. With substructure mode synthesis technology, the first-order sensitivity of repeated eigenvalues and corresponding derivable eigenvectors are derived.
2．针对重频结构中，重特征值对应的特征向量出现退化的问题。
参考来源 - 复杂结构的动力重分析方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A new random finite element method for solving repeated eigenvalues problems involving beams' structures with stochastic stiffness was proposed.
利用一种新的方法来研究具随机刚度梁结构的重特征值问题。
However, the perturbation methods for distinct or repeated eigenvalues can not be directly used to deal with the vibration modes with close eigenvalues.
然而，已有的孤立特征值摄动法和重特征值摄动法都难于用来解决密集模态的摄动问题。
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