期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 195, 期 17-18, 页码 2050-2069出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2004.09.013
关键词
aeroelasticity; design optimization; sensitivity analysis; three-field formulation
This paper presents a Newton-Krylov approach applied to a Schur complement formulation for the analysis and design sensitivity analysis of systems undergoing fluid-structure interaction. This solution strategy is studied for a three-field formulation of an aeroelastic problem under steady-state conditions and applied to the design optimization of three-dimensional wing structures. A Schur-Krylov solver is introduced for computing the design sensitivities. Comparing the Schur-Newton-Krylov solver with conventional Gauss-Seidel schemes shows that the proposed approach significantly improves robustness and convergence rates, in particular for problems with strong fluid-structure coupling. In addition, the numerical efficiency of the aeroelastic sensitivity analysis can be typically improved by more than a factor of 1.5, especially if high accuracy is required. (c) 2005 Elsevier B.V. All rights reserved.
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