Nonintrusive structural dynamic reduced order modeling for large deformations: Enhancements for complex structures

Ricardo Perez, X. Q. Wang, Marc Mignolet

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

This paper focuses on the development of nonlinear reduced order modeling techniques for the prediction of the response of complex structures exhibiting "large" deformations, i.e., a geometrically nonlinear behavior, which are nonintrusive, i.e., the structure is originally modeled within a commercial finite element code. The present investigation builds on a general methodology successfully validated in recent years on simpler beam and plate structures by: (i) developing a novel identification strategy of the reduced order model parameters that enables the consideration of the large number of modes (>50 say) that would be needed for complex structures, and (ii) extending a step-by-step strategy for the selection of the basis functions used to represent accurately the displacement field. The above novel developments are successfully validated on the nonlinear static response of a nine-bay panel structure modeled with 96,000 degrees of freedom within Nastran.

Original languageEnglish (US)
Article number031008
JournalJournal of Computational and Nonlinear Dynamics
Volume9
Issue number3
DOIs
StatePublished - Jul 1 2014

Keywords

  • finite elements
  • nonlinear geometric response
  • reduced order modeling

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Applied Mathematics

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