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Subsystem Global Modal Parameterization for efficient simulation of flexible multibody systems
Author(s) -
Naets F.,
Heirman G.H.K.,
Desmet W.
Publication year - 2011
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.3284
Subject(s) - modal , reference frame , reduction (mathematics) , multibody system , mechanism (biology) , frame of reference , motion (physics) , frame (networking) , computer science , position (finance) , modal analysis , control theory (sociology) , engineering , mathematics , finite element method , artificial intelligence , structural engineering , classical mechanics , physics , geometry , telecommunications , chemistry , control (management) , polymer chemistry , economics , finance , quantum mechanics
SUMMARY This paper presents a new model order reduction strategy for flexible multibody simulation, namely the Subsystem Global Modal Parameterization . The proposed method is based on a system‐level reduction technique, named Global Modal Parameterization, but offers significant improvements for systems with many independent DOFs. The approach splits up the motion of a mechanism or part of a mechanism into a relative motion, in which the members move relatively with respect to each other, and a global motion of the system, in which the relative position of the members does not change. The relative motion is described by a local Global Modal Parameterization model expressed in a mechanism‐attached frame, and the global motion is described by the motion of the mechanism‐attached frame. In order to improve simulation efficiency, mass invariants are used, which are also introduced in this paper. Two numerical examples are presented, which show the good accuracy and the major simulation efficiency improvements this new approach offers. Copyright © 2011 John Wiley & Sons, Ltd.