Deformable body model reduction with mean-axes

Yi Shih Lin, Parviz E. Nikravesh

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Dynamic analysis of multibody systems containing deformable bodies is computationally time-consuming because of the large number of deformation degrees-of-freedom. Transforming the equations of motion to modal space and then truncating a significant number of higher frequency modes can greatly reduce the problem size and hence improve the computation time. There is a misconception that mean-axes cannot be used for constrained systems when model reduction is desired. This paper attempts to clarify this issue and shows that it is perfectly fine to use the standard static and normal modes in conjunction with the mean-axis conditions.

Original languageEnglish (US)
Pages (from-to)469-488
Number of pages20
JournalMechanics Based Design of Structures and Machines
Issue number4
StatePublished - Dec 1 2006


  • Floating frames
  • Mean-axes frame
  • Mode condensation
  • Model reduction
  • Multibody dynamics
  • Nodal-fixed frame

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Mathematics
  • Automotive Engineering
  • Aerospace Engineering
  • Condensed Matter Physics
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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