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An iterative scheme of flexibility‐based component mode synthesis with higher‐order residual modal compensation
Author(s) -
Chung In Seob,
Kim JinGyun,
Chae SooWon,
Park K.C.
Publication year - 2021
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.6656
Subject(s) - lagrange multiplier , residual , modal , flexibility (engineering) , component (thermodynamics) , iterative method , mathematics , iterative and incremental development , mathematical optimization , algorithm , scheme (mathematics) , process (computing) , mode (computer interface) , reduction (mathematics) , computer science , compensation (psychology) , control theory (sociology) , mathematical analysis , artificial intelligence , chemistry , statistics , physics , software engineering , geometry , polymer chemistry , thermodynamics , operating system , psychology , control (management) , psychoanalysis
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 ( q d , α , u b )‐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.