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

Soo Min Kim, Jin Gyun Kim, K. C. Park, Soo Won Chae

Research output: Contribution to journalArticle

10 Citations (Scopus)


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 CMSσ 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 CMSχ method.

Original languageEnglish
Pages (from-to)578-597
Number of pages20
JournalComputer Methods in Applied Mechanics and Engineering
Publication statusPublished - 2018 Mar 1



  • Component mode synthesis
  • Mode selection method
  • Moment-matching
  • Reduced-order modeling
  • Structural dynamics

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

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