References
- AIAA Journal v.26 Efficient computation of Modal Sensitivities for Systmes with Repeated Frequencies I. U. Ojalvo
- AIAA Journal v.26 Calculation of Derivatives for Structures with Repeated Eigenvalues W. C. Mills-Curran
- AIAA Journal v.27 Eigenvector Derivatives with Repeated Eigenvalues R. L. Dailey
- Journal of Structural Mechanics v.14 Second-order Sensitivity Analysis of Multimodal Eigenvalues and Related Optimization Techniques W. Zhong;G. Cheng
- AIAA J. v.32 Modal Expansion Method for Eigensensitivity with Repeated Roots M. L. Bernard;A. J. Bronowicki
- Journal of Guidance, Control and Dynamics v.12 Eigenvector Derivatives of Repeated Eigenvalues Using Singular Value Decomposition K. B. Lim;J.-N. Juang;P. Ghaemmaghami
- Computers and Structures v.62 no.3 An Efficient Algebraic Method for Computation of Natural Frequency and Mode Shape Sensitivities : Part I, Distinct Natural Frequencies I. W. Lee;G. H. Jung
- Computers and Structures v.62 no.3 An Efficient Algebraic Method for Computation of Natural Frequency and Mode Shape Sensitivities : Part II, Multiple Natural Frequencies I. W. Lee;G. H. Jung
- AIAA Journal v.14 Simplified Calculations of Eigenvector Derivatives R. B. Nelson
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$4^{th}$ International Modal Analysis Conference(IMAC) Design Sensitivity Analysis of Vibration Modes by Finite Element Perturbation S. H. Chen;H. H. Pan - Finite Element Procedures in Engineering Analysis K. J. Bathe