| タイトル | An unsymmetric Lanczos algorithm for damped structural dynamics systems |
| 著者（英） | Su, Tzu-Jeng; Craig, Roy R., Jr. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 1992-01-01 |
| 言語 | eng |
| 内容記述 | A one-sided, unsymmetric block Lanczos algorithm is proposed for the model reduction of structural dynamics systems with unsymmetric damping and/or stiffness matrices. The algorithm is a three-term iteration scheme, which transforms the system matrix into an almost skew-symmetric, block-tridiagonal form. The Lanczos reduced-order model is guaranteed to be stable if the full-order system is stable. For unstable systems, a shifting method is available. Also, the algorithm offers flexibility in the choice of starting vectors and thus can yield more accurate reduced-order models. A linear system example and a plane truss structure example are used to show the efficacy of the proposed method. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 92A34503
AIAA PAPER 92-2510 |
| 権利 | Copyright |
|
