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Erschienen in:
2022 | OriginalPaper | Buchkapitel
9. Weakening of the Interface Constraints in Modal Substructuring Using Singular Value Decomposition
verfasst von : Miha Pogačar, Tomaž Bregar, Gregor Čepon, Miha Boltežar
Erschienen in: Dynamic Substructures, Volume 4
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Abstract
An experimental approach to modal substructuring often proves to be problematic. One of the issues to be addressed is to determine a suitable set of constrain equations to be applied when considering an interface with multiple connection points. An approach to solving this problem was presented in the transmission simulator method (TSM), where a truncated set of mode shapes of a flexible fixture is used to project the constraints on the fixture’s vector subspace. In this paper, the possibility of using the singular value decomposition (SVD) to obtain an appropriate subspace basis for weakening the constrain equations is explored. The most dominant response modes, acquired by performing SVD on the frequency response functions at the interface, are selected to weaken the constrain equations. The proposed approach is validated in a numerical case study.