next up previous
Next: About this document ...

Drew P. Kouri
An Approach for the Adaptive Solution of Optimization Problems Governed by PDEs with Uncertain Coefficients

6100 Main St - MS 134
Houston
TX 77005-1892
dk3@rice.edu

Using derivative based numerical optimization routines to solve optimization problems governed by partial differential equations (PDE) with uncertain coefficients is computationally expensive due to the large number of PDE solves required at each iteration. I propose a framework for the adaptive solution of such optimization problems based on the retrospective trust region algorithm. I prove global convergence of the retrospective trust region algorithm under weak assumptions on gradient inexactness. If one can bound the error between actual and modeled gradients using reliable and efficient a posteriori error estimators, then the global convergence of the proposed algorithm follows. I present a stochastic collocation finite element method for the solution of the PDE constrained optimization problems. In the stochastic collocation framework, the state and adjoint equations can be solved in parallel. Initial numerical results for the adaptive solution of these optimization problems are presented.





root 2012-02-20