Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 229, Issue 12, Pages 4664-4682Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2010.03.005
Keywords
Stochastic optimization; Uncertainty quantification; Surrogate Management Framework (SMF); Derivative-free optimization; Mesh Adaptive Direct Search (MADS); Probabilistic constraints
Funding
- Burroughs Wellcome Fund
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Recent advances in coupling novel optimization methods to large-scale computing problems have opened the door to tackling a diverse set of physically realistic engineering design problems. A large computational overhead is associated with computing the cost function for most practical problems involving complex physical phenomena. Such problems are also plagued with uncertainties in a diverse set of parameters. We present a novel stochastic derivative-free optimization approach for tackling such problems. Our method extends the previously developed surrogate management framework (SMF) to allow for uncertainties in both simulation parameters and design variables. The stochastic collocation scheme is employed for stochastic variables whereas Kriging based surrogate functions are employed for the cost function. This approach is tested on four numerical optimization problems and is shown to have significant improvement in efficiency over traditional Monte-Carlo schemes. Problems with multiple probabilistic constraints are also discussed. (C) 2010 Elsevier Inc. All rights reserved.
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