Efficient aerodynamic shape optimization in MDO context

Authors:
Antonio Fazzolari;Nicolas R. Gauger;Joël Brezillon
Affiliations:
German Aerospace Center (DLR), Lilienthalplatz 7, 38108 Braunschweig, Germany;German Aerospace Center (DLR), Lilienthalplatz 7, 38108 Braunschweig, Germany;German Aerospace Center (DLR), Lilienthalplatz 7, 38108 Braunschweig, Germany
Venue:
Journal of Computational and Applied Mathematics
Year:
2007

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Abstract

Multidisciplinary analysis is necessary to reach physically meaningful optimum designs. For aero-structural shape optimization this means coupling two disciplines-aerodynamics and structural mechanics. In this paper, the sensitivity evaluation for aerodynamic shape optimization is considered, while taking into account the static aeroelastic effects introduced by the variations in the aerodynamic forces, which are associated with changes in the aerodynamic shape. Due to the high computational cost of a finite difference evaluation step for such a coupled problem, an extension of the adjoint approach to aeroelasticity is necessary for an efficient calculation of the sensitivities. The implementation, validation and application of such a method in the MDO context described above are presented.