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 language | English |
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Pages (from-to) | 3171-3190 |
Number of pages | 20 |
Journal | International Journal for Numerical Methods in Engineering |
Volume | 122 |
Issue number | 13 |
DOIs | |
Publication status | Published - 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