Deformable body model reduction with mean-axes

Yi Shih Lin; Parviz E. Nikravesh

doi:10.1080/15397730601044929

Deformable body model reduction with mean-axes

Yi Shih Lin, Parviz E. Nikravesh

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	469-488
Number of pages	20
Journal	Mechanics Based Design of Structures and Machines
Volume	34
Issue number	4
DOIs	https://doi.org/10.1080/15397730601044929
State	Published - Dec 1 2006

Keywords

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

ASJC Scopus subject areas

Civil and Structural Engineering
Mathematics(all)
Automotive Engineering
Aerospace Engineering
Condensed Matter Physics
Ocean Engineering
Mechanics of Materials
Mechanical Engineering

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10.1080/15397730601044929

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title = "Deformable body model reduction with mean-axes",

abstract = "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.",

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T1 - Deformable body model reduction with mean-axes

AU - Lin, Yi Shih

AU - Nikravesh, Parviz E.

PY - 2006/12/1

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N2 - 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.

AB - 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.

KW - Floating frames

KW - Mean-axes frame

KW - Mode condensation

KW - Model reduction

KW - Multibody dynamics

KW - Nodal-fixed frame

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JO - Mechanics Based Design of Structures and Machines

JF - Mechanics Based Design of Structures and Machines

IS - 4

ER -

Deformable body model reduction with mean-axes

Abstract

Keywords

ASJC Scopus subject areas

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