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Design Procedure for Optimum Fiber Composite Airframe Structures Within an Automated Multidisciplinary Design and Optimization Process

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AeroStruct: Enable and Learn How to Integrate Flexibility in Design (AeroStruct 2015)

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 138))

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Abstract

This paper presents a concept and setup of a design procedure for optimum fiber composite airframe structures within an automated multidisciplinary design and optimization process. The optimization procedure is based on the Three-Columns-Concept, using a state-of the-art Finite-Element-Method (FEM) software for structural analysis purposes embedded into a multidisciplinary optimization software. The optimization model is formulated for traditional civil aircraft designs, providing maximum design flexibility in order to tailor-made the characteristics of fiber composite materials, including aeroelastic tailoring. Therefore, the design domain includes both, geometry and laminae related design variables. In doing so, a strict separation of the design model from the analysis model is implemented. The evaluation model includes all important structural design objectives, like mass, deformations (e.g. wing bending and twisting), local and global buckling behavior (classical eigenvalue analysis), strength as well as damage tolerance. Aggregation methods are applied to reduce the tremendous number of constraints and to improve the robustness of the optimization process. Finally, optimization results of a forward swept wing configuration, optimized with respect to structural design objectives, are presented.

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Acknowledgements

The work was financially supported by the LuFo IV research and technology project AeroStruct (LuFo-IV-249-028), granted by the Federal Ministry of Economics and Technology (BMWi), without which the present study could not have been accomplished.

Thanks and appreciation to Hugo Velásquez Leiva and Horaţiu-George Goanţă for their exceptional dedication and commitment to the project AeroStruct. Their contributions enabled the successful achievement of the research objectives.

In developing the ideas presented, the contributions of the colleagues from DLR-FA (German Aerospace Center, Institute of Composite Structures and Adaptive Systems) is gratefully acknowledged.

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  1. University of Applied Sciences, Hamburg, Germany

    Michael Seibel

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  1. Michael Seibel
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Correspondence to Michael Seibel .

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Editors and Affiliations

  1. DLR, Institute of Aerodynamics and Flow Technology, Braunschweig, Germany

    Ralf Heinrich

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Seibel, M. (2018). Design Procedure for Optimum Fiber Composite Airframe Structures Within an Automated Multidisciplinary Design and Optimization Process. 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_3

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  • DOI: https://doi.org/10.1007/978-3-319-72020-3_3

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-72019-7

  • Online ISBN: 978-3-319-72020-3

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