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Colloquium - Young

Newton's Method for Aerodynamic and Aero-elastic Analysis Design
David Young
The Boeing Company
2/29/1996
3:45pm-5:00pm

We show that many optimization methods for multi-disciplinary problems can be applied in the analysis case and are equivalent to well known methods. We will contrast two methods of coupling an inviscid flow solver with a boundary layer solver and discuss the implications for coupling disciplines in black box mode. Also discussed are the role of optimization software, the role of inexactness, and the importance of application dependent global damping and regularization processes including solution adaptive grid refinement and nonlinear continuation algorithms in optimization processes. We also deal with the question of ill-posedness of inverse problems and its relation to the likely success or lack thereof of various paradigms of constrained optimization.

These issues are of particular importance in application areas such as aerodynamic optimization where it is desirable to use large numbers of design and state variables. In actual engineering design situations where rapid response is crucial, these considerations of computational turnaround, reliability of convergence, and computing cost assume great importance.

Refreshments will be served immediately before the talk at 3:30pm.
Hosted by Xiao-Chuan Cai.

Department of Computer Science
University of Colorado Boulder
Boulder, CO 80309-0430 USA
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www.cs.colorado.edu
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