Postbuckling and large-deflection nonlinear analyses on distributed-memory computers
Abstract
A computational strategy is presented for postbuckling and nonlinear static analyses of large complex structures on distributed-memory parallel computers. The strategy is designed for message-passing parallel computer systems. The key elements of the proposed strategy are: (1) a multiple-parameter reduced basis technique; (2) a nested dissection (or multilevel substructuring) ordering scheme; (3) parallel assembly of global matrices; and (4) a parallel sparse equation solver. The effectiveness of the strategy is assessed by performing thermomechanical postbuckling analyses of stiffened composite panels with cutouts, and nonlinear large-deflection analyses of High Speed Civil Transport models on three distributed-memory computers. The numerical studies presented demonstrate the advantages of nested dissection-based solvers over traditional skyline-based solvers on distributed-memory machines.
- Publication:
-
In its Center for Computational Structures Technology 1 p (SEE N95-26263 08-39
- Pub Date:
- April 1995
- Bibcode:
- 1995csta.nasaR....W
- Keywords:
-
- Buckling;
- Computation;
- Nonlinear Equations;
- Parallel Computers;
- Composite Structures;
- Openings;
- Panels;
- Thermodynamics;
- Structural Mechanics