NDLI: Elimination sequence optimization for spar

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Elimination sequence optimization for spar

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hogan, Harry A.
Copyright Year	1986
Description	SPAR is a large-scale computer program for finite element structural analysis. The program allows user specification of the order in which the joints of a structure are to be eliminated since this order can have significant influence over solution performance, in terms of both storage requirements and computer time. An efficient elimination sequence can improve performance by over 50% for some problems. Obtaining such sequences, however, requires the expertise of an experienced user and can take hours of tedious effort to affect. Thus, an automatic elimination sequence optimizer would enhance productivity by reducing the analysts' problem definition time and by lowering computer costs. Two possible methods for automating the elimination sequence specifications were examined. Several algorithms based on the graph theory representations of sparse matrices were studied with mixed results. Significant improvement in the program performance was achieved, but sequencing by an experienced user still yields substantially better results. The initial results provide encouraging evidence that the potential benefits of such an automatic sequencer would be well worth the effort.
File Size	832974
Page Count	23
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870007332
Archival Resource Key	ark:/13960/t8sb8zq6h
Language	English
Publisher Date	1986-11-01
Access Restriction	Open
Subject Keyword	Computer Programming And Software Joints Junctions Algorithms Data Storage Applications Programs Computers Graph Theory Run Time Computers Matrices Mathematics Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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