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Identification of Parameter Matrices Using Residual Force Vector

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Abstract:

The physical parameters obtained from modal tests do not satisfy the eigenvalue function due to modeling and measurement errors, and unexpected damage. The desired dynamic response can be obtained by identifying the most appropriate changes required to obtain the desired dynamic behaviour. The purpose of this study is to present the analytical equations on the updated stiffness and mass matrices in the satisfaction of eigenfunction including residual force vector term. Minimizing the cost functions of the difference between analytical and desired physical parameter matrices, the variations in parameter matrices are straightforwardly derived without using any multipliers. The validity of the proposed methods is evaluated in an application.

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Periodical:

Applied Mechanics and Materials (Volume 394)

Pages:

157-162

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.394.157

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Online since:

September 2013

Authors:

Hee Chang Eun, Rae Jung Kim, Young Jun Ahn

Keywords:

Eigenvalue Function, Minimization, Moore-Penrose Inverse, Parameter Matrices, Residual Force Vector

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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