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Erschienen in:
2018 | OriginalPaper | Buchkapitel
10. Interfacing MSC Nastran to the CFD-Solver DLR-Tau for Unsteady FSI Analyses with Nonlinear Aircraft Structures
verfasst von : Matthias C. Haupt, Klemens Lindhorst, Peter Horst
Erschienen in: AeroStruct: Enable and Learn How to Integrate Flexibility in Design
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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.