A comparison of eigensolvers for large-scale 3D modal analysis using AMG-preconditioned iterative methods.
Journal Article
·
· Proposed for publication in International Journal for Numerical Methods in Engineering.
- Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
- Sandia National Laboratories, Livermore, CA
The goal of our paper is to compare a number of algorithms for computing a large number of eigenvectors of the generalized symmetric eigenvalue problem arising from a modal analysis of elastic structures. The shift-invert Lanczos algorithm has emerged as the workhorse for the solution of this generalized eigenvalue problem; however, a sparse direct factorization is required for the resulting set of linear equations. Instead, our paper considers the use of preconditioned iterative methods. We present a brief review of available preconditioned eigensolvers followed by a numerical comparison on three problems using a scalable algebraic multigrid (AMG) preconditioner.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 990992
- Report Number(s):
- SAND2005-0282J; ISSN 1097-0207; TRN: US201020%%660
- Journal Information:
- Proposed for publication in International Journal for Numerical Methods in Engineering., Vol. 64, Issue 2; ISSN 0029-5981
- Country of Publication:
- United States
- Language:
- English
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