Abstract
For the partitioned analysis of fluid structure interactions the coupling of fluid and structural analysis codes is a basic requirement. For this purpose the MSC Nastran solver provides a programming interface OpenFSI, which is used and extended here for a flexible usage. Target is the integration of this nonlinear structural solver into the parallel programming environment FlowSimulator in which the DLR-Tau code is used for fluid analysis. The developed component based architecture and implementation is explained in detail. Two applications show the characteristics of nonlinear behaviour of aircraft structures. A beam-like behaviour shows in the nonlinear aeroelastic loading case a stiffening due to larger deflections and rotations and a correct kinematic shortening of the wing-span. A tin-walled wing structure shows skin buckling, which reduces the overall stiffness of the wing and alters the flowfield locally. Both effects can not be reproduced by the classical linear theory.
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Acknowledgements
As part of the “AeroStruct” project the partial funding of this research under contract FKZ 20A1102A of the Federal Ministry of Economics and Technology through the German Aerospace Center is greatfully acknowledged. The authors thank Markus Ritter of the DLR Göttingen and Kolja Elssel of Airbus Defense and Space for the valueable discussions.
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Haupt, M.C., Lindhorst, K., Horst, P. (2018). Interfacing MSC Nastran to the CFD-Solver DLR-Tau for Unsteady FSI Analyses with Nonlinear Aircraft Structures. In: Heinrich, R. (eds) AeroStruct: Enable and Learn How to Integrate Flexibility in Design. AeroStruct 2015. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 138. Springer, Cham. https://doi.org/10.1007/978-3-319-72020-3_10
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DOI: https://doi.org/10.1007/978-3-319-72020-3_10
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