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Study on the Structural System Condensation Using Multi-level Sub-structuring Scheme in Large-scale Problems  

Baek, Sung-Min (서울대학교 기계항공공학부)
Cho, Maeng-Hyo (서울대학교 기계항공공학부)
Kim, Hyun-Gi (한국항공우주연구원)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.21, no.3, 2008 , pp. 281-285 More about this Journal
Abstract
Eigenvalue reduction schemes approximate the lower eigenmodes that represent the global behavior of the structures. In the previous study, we proposed a two-level condensation scheme (TLCS) for the construction of a reduced system. And we have improved previous TLCS with combination of the iterated improved reduced system method (IIRS) to increase accuracy of the higher modes intermediate range. In this study, we apply previous improved TLCS to multi-level sub-structuring scheme. In the first step, the global system is recursively partitioned into a hierarchy of sub-domain. In second step, each uncoupled sub-domain is condensed by the improved TLCS. After assembly process of each reduced sub-eigenvalue problem, eigen-solution is calculated by Lanczos method (ARPACK). Finally, Numerical examples demonstrate performance of proposed method.
Keywords
eigenvalue problem; system condensation; multilevel-substructuring; two-level condensation scheme(TLCS);
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Times Cited By KSCI : 2  (Citation Analysis)
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