An iterative scheme of flexibility-based component mode synthesis with higher-order residual modal compensation

In Seob Chung, Jin Gyun Kim, Soo Won Chae, K. C. Park

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    An Iterative Flexibility-based Component Mode Synthesis (IF-CMS) is presented for the model reduction of partitioned structural dynamic systems via localized Lagrange multipliers. A distinct IF-CMS feature is the inclusion of hierarchical residual flexibility at each iteration, resulting in considerably improved accuracy compared with the classical Craig–Bampton (CB) CMS method. The present IF-CMS method does not increase the number of substructural modes during the hierarchical iteration process. In particular, to alleviate ill-conditioning during the iteration steps, the proposed IF-CMS method adopts the so-called (qd, (Formula presented.), ub)-formulation by condensing Lagrange multipliers from the original F-CMS method. The performance of the proposed method is evaluated through numerical examples, which illustrates improved accuracy over existing CMS methods.

    Original languageEnglish
    Pages (from-to)3171-3190
    Number of pages20
    JournalInternational Journal for Numerical Methods in Engineering
    Volume122
    Issue number13
    DOIs
    Publication statusPublished - 2021 Jul 15

    Bibliographical note

    Publisher Copyright:
    © 2021 John Wiley & Sons Ltd.

    Keywords

    • component mode synthesis
    • iterative method
    • localized Lagrange multipliers
    • partitioned formulation
    • residual flexibility

    ASJC Scopus subject areas

    • Numerical Analysis
    • General Engineering
    • Applied Mathematics

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