Eigenvalue and eigenvector derivatives of second-order systems using structure-preserving equivalences
Eigenvalue and eigenvector derivatives of second-order systems using structure-preserving equivalences
复制标题
使用结构保持等价的二阶系统的特征值和特征向量导数
DOI:
10.1016/j.jsv.2009.01.032
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发表时间:
2009
影响因子:
4.7
通讯作者:
Abuazoum L
中科院分区:
文献类型:
--
作者:
Abuazoum L
A “structure-preserving equivalence” in the sense intended here is a mapping between the stiffness, damping and mass matrices describing some initial second-order system and the corresponding three matrices of another second-order system having identical spectrum. Most second-order systems can be “diagonalised” through a mapping of this sort. The mapping provides a new approach to the evaluation and the understanding of eigenvalue and eigenvector derivatives. In place of pairs of eigenvalues, we think of real scalar stiffness, damping and mass quantities representing decoupled single-degree-of-freedom systems. In place of pairs of eigenvectors, we think of individual columns of the matrices involved in the mapping. This approach resolves the completely artificial phenomenon that the eigenvalue and eigenvector derivatives become “undefined” at instants when modification of, say, a damping parameter causes a pair of complex eigenvalues to turn into a pair of real eigenvalues or vice-versa. It also has the advantage of being applicable to cases where any one or more of the system matrices are singular.
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DOI:
--
发表时间:
1971
期刊:
影响因子:
--
作者:
C. S. Rudisill;K. Bhatia
通讯作者:
K. Bhatia
影响因子:
2.5
作者:
M. Friswell;S. Adhikari
通讯作者:
M. Friswell;S. Adhikari
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
S. Garvey;U. Prells;M. Friswell;Zheng Chen
通讯作者:
Zheng Chen
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
C. S. Rudisill;K. Bhatia
通讯作者:
K. Bhatia