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Title: Progressive construction of a parametric reduced‐order model for PDE‐constrained optimization

Journal Article · · International Journal for Numerical Methods in Engineering
DOI:https://doi.org/10.1002/nme.4770· OSTI ID:1400895
 [1];  [2]
  1. Institute for Computational and Mathematical Engineering Stanford University Mail Code 4035 Stanford CA 94305 USA
  2. Institute for Computational and Mathematical Engineering Stanford University Mail Code 4035 Stanford CA 94305 USA, Department of Aeronautics and Astronautics Stanford University Mail Code 4035 Stanford CA 94305 USA, Department of Mechanical Engineering Stanford University Mail Code 4035 Stanford CA 94305 USA

Summary An adaptive approach to using reduced‐order models (ROMs) as surrogates in partial differential equations (PDE)‐constrained optimization is introduced that breaks the traditional offline‐online framework of model order reduction. A sequence of optimization problems constrained by a given ROM is defined with the goal of converging to the solution of a given PDE‐constrained optimization problem. For each reduced optimization problem, the constraining ROM is trained from sampling the high‐dimensional model (HDM) at the solution of some of the previous problems in the sequence. The reduced optimization problems are equipped with a nonlinear trust‐region based on a residual error indicator to keep the optimization trajectory in a region of the parameter space where the ROM is accurate. A technique for incorporating sensitivities into a reduced‐order basis is also presented, along with a methodology for computing sensitivities of the ROM that minimizes the distance to the corresponding HDM sensitivity, in a suitable norm. The proposed reduced optimization framework is applied to subsonic aerodynamic shape optimization and shown to reduce the number of queries to the HDM by a factor of 4‐5, compared with the optimization problem solved using only the HDM, with errors in the optimal solution far less than 0.1%. Copyright © 2014 John Wiley & Sons, Ltd.

Sponsoring Organization:
USDOE
OSTI ID:
1400895
Journal Information:
International Journal for Numerical Methods in Engineering, Journal Name: International Journal for Numerical Methods in Engineering Vol. 102 Journal Issue: 5; ISSN 0029-5981
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 79 works
Citation information provided by
Web of Science

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