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A component mode selection method based on a consistent perturbation expansion of interface displacement

Authors
Kim, Soo MinKim, Jin-GyunPark, K. C.Chae, Soo-Won
Issue Date
1-3월-2018
Publisher
ELSEVIER SCIENCE SA
Keywords
Mode selection method; Moment-matching; Component mode synthesis; Reduced-order modeling; Structural dynamics
Citation
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v.330, pp.578 - 597
Indexed
SCIE
SCOPUS
Journal Title
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume
330
Start Page
578
End Page
597
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/76784
DOI
10.1016/j.cma.2017.11.010
ISSN
0045-7825
Abstract
A mode selection method is presented for the reduced-order modeling (ROM) of structural systems in conjunction with the Craig-Bampton component mode synthesis technique. The proposed method is derived by using a consistent expansion of the interface displacement in terms of a frequency-dependent small parameter as applied to a Craig-Bampton-like ROM formulation. It is found that this procedure yields a coupling mechanism of the modes of the full model to those of substructures. The present mode selection method employs this coupling mechanism as an indicator, labeled as the CMS sigma method, for the substructural modal contributions to the full model. The performance of the proposed method is demonstrated by various numerical examples and compared favorably with existing method such as the CMS chi method. (C) 2017 Elsevier B.V. All rights reserved.
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