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Sub-domain decomposition methods and computational controls for multibody dynamical systemsThis paper presents a concurrent methodology to simulate the dynamics of flexible multibody systems with a large number of degrees of freedom. A general class of open-loop structures is treated and a redundant coordinate formulation is adopted. A range space method is used in which the constraint forces are calculated using a preconditioned conjugate gradient method. By using a preconditioner motivated by the regular ordering of the directed graph of the structures, it is shown that the method is order N in the total number of coordinates of the system. The overall formulation has the advantage that it permits fine parallelization and does not rely on system topology to induce concurrency. It can be efficiently implemented on the present generation of parallel computers with a large number of processors. Validation of the method is presented via numerical simulations of space structures incorporating large number of flexible degrees of freedom.
Document ID
19930036721
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Menon, R. G.
(NASA Langley Research Center Hampton, VA, United States)
Kurdila, A. J.
(Texas A & M Univ. College Station, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Computing Systems in Engineering
Volume: 3
Issue: 4-Jan
ISSN: 0956-0521
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
93A20718
Funding Number(s)
CONTRACT_GRANT: NAG1-1326
Distribution Limits
Public
Copyright
Other

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