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Parallel-vector computation for linear structural analysis and non-linear unconstrained optimization problemsSeveral parallel-vector computational improvements to the unconstrained optimization procedure are described which speed up the structural analysis-synthesis process. A fast parallel-vector Choleski-based equation solver, pvsolve, is incorporated into the well-known SAP-4 general-purpose finite-element code. The new code, denoted PV-SAP, is tested for static structural analysis. Initial results on a four processor CRAY 2 show that using pvsolve reduces the equation solution time by a factor of 14-16 over the original SAP-4 code. In addition, parallel-vector procedures for the Golden Block Search technique and the BFGS method are developed and tested for nonlinear unconstrained optimization. A parallel version of an iterative solver and the pvsolve direct solver are incorporated into the BFGS method. Preliminary results on nonlinear unconstrained optimization test problems, using pvsolve in the analysis, show excellent parallel-vector performance indicating that these parallel-vector algorithms can be used in a new generation of finite-element based structural design/analysis-synthesis codes.
Document ID
19920029732
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nguyen, D. T.
(Old Dominion Univ. Norfolk, VA, United States)
Al-Nasra, M.
(Old Dominion Univ. Norfolk, VA, United States)
Zhang, Y.
(Old Dominion Univ. Norfolk, VA, United States)
Baddourah, M. A.
(Old Dominion Univ. Norfolk, VA, United States)
Agarwal, T. K.
(Old Dominion University Norfolk, VA, United States)
Storaasli, O. O.
(NASA Langley Research Center Hampton, VA, United States)
Carmona, E. A.
(USAF, Phillips Laboratory, Kirtland AFB NM, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Computing Systems in Engineering
Volume: 2
Issue: 3-Feb
ISSN: 0956-0521
Subject Category
Computer Programming And Software
Accession Number
92A12356
Funding Number(s)
CONTRACT_GRANT: NAG1-858
CONTRACT_GRANT: F49620-88-C-0053
CONTRACT_GRANT: NAS1-18584
Distribution Limits
Public
Copyright
Other

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