Substructure based approach to finite element model updating |
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Authors: | Shun Weng Yong Xia You-Lin Xu Hong-Ping Zhu |
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Affiliation: | 1. Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei, PR China |
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Abstract: | A substructure-based finite element model updating technique is proposed in this paper. A few eigenmodes of the independent substructures and their associated derivative matrices are assembled into a reduced eigenequation to recover the eigensolutions and eigensensitivities of the global structure. Consequently, only the concerned substructures and the reduced eigenequation are re-analyzed in the optimization process, thus reducing the computational load of the traditional model updating methods which perform on the global structure. Applications of the proposed substructure-based model updating to a frame structure and a practical bridge demonstrate that the present method is computationally effective and efficient. |
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