NDLI: Eigenvalue routines in nastran: a comparison with the block lanczos method

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Eigenvalue routines in nastran: a comparison with the block lanczos method

Content Provider	NASA Technical Reports Server (NTRS)
Author	Venkayya, Vipperla B. Tischler, V. A.
Copyright Year	1993
Description	The NASA STRuctural ANalysis (NASTRAN) program is one of the most extensively used engineering applications software in the world. It contains a wealth of matrix operations and numerical solution techniques, and they were used to construct efficient eigenvalue routines. The purpose of this paper is to examine the current eigenvalue routines in NASTRAN and to make efficiency comparisons with a more recent implementation of the Block Lanczos algorithm by Boeing Computer Services (BCS). This eigenvalue routine is now available in the BCS mathematics library as well as in several commercial versions of NASTRAN. In addition, CRAY maintains a modified version of this routine on their network. Several example problems, with a varying number of degrees of freedom, were selected primarily for efficiency bench-marking. Accuracy is not an issue, because they all gave comparable results. The Block Lanczos algorithm was found to be extremely efficient, in particular, for very large size problems.
File Size	1067619
Page Count	33
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940013365
Archival Resource Key	ark:/13960/t6644nw2p
Language	English
Publisher Date	1993-09-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Dynamic Structural Analysis Finite Element Method Stiffness Matrix Subroutines Eigenvalues Vibration Mode Eigenvectors Nastran Matrix Methods Cray Computers Data Reduction 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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