Volume 26 Issue 5
May  2000
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LI Shu, ANG Xiao-gu. Exact Solution of Eigenvalue and Eigenvector Derivatives and Its Application in Structural Dynamics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(5): 577-580. (in Chinese)
Citation: LI Shu, ANG Xiao-gu. Exact Solution of Eigenvalue and Eigenvector Derivatives and Its Application in Structural Dynamics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(5): 577-580. (in Chinese)

Exact Solution of Eigenvalue and Eigenvector Derivatives and Its Application in Structural Dynamics

  • Received Date: 12 May 1999
  • Publish Date: 31 May 2000
  • To compute eigenvector derivatives with repeated eigenvalues, several extended Nelson's methods have been developed. Some of these methods have been pointed out that they may fail in some cases. To deal with those difficulties under repeated eigenvalues circumstances, we develop formulas to calculate sensitivities and discuss the case where repeated eigenvalues are present in this paper. The exact solution of derivatives of eigenvalue and eigenvector is presented by utilizing the mathematical theorem and new definitions of sensitivities. This algorithm is rigorous mathematically and suits for both distinct and multiple eigenvalues cases. The new technique is powerful, easy to implement and simple in its conception. For practical application, the probability is discussed to determining approximate solution by using lower order eigendata. Example will be presented that demonstrates the algorithm.

     

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