Print Email Facebook Twitter Preliminary aeroelastic design of composite wings subjected to critical gust loads Title Preliminary aeroelastic design of composite wings subjected to critical gust loads Author Rajpal, D. (TU Delft Aerospace Structures & Computational Mechanics) Gillebaart, E. (TU Delft Aerospace Structures & Computational Mechanics) De Breuker, R. (TU Delft Aerospace Structures & Computational Mechanics) Date 2019-02-01 Abstract Including a gust analysis in an optimization framework is computationally expensive as the critical load cases are not known a priori and hence a large number of points within the flight envelope have to be analyzed. Model order reduction techniques can provide significant improvement in computational efficiency of an aeroelastic analysis. In this paper, after thorough analysis of 4 commonly used model order reduction methods, balanced proper orthogonal decomposition is selected to reduce the aerodynamic system which is based on potential flow theory. The reduced aerodynamic system is coupled to a structural solver to obtain a reduced-order aeroelastic model. It is demonstrated that the dominant modes of the aerodynamic model can be assumed to be constant for varying equivalent airspeed and Mach number, enabling the use of a single reduced model for the entire flight envelope. A dynamic aeroelastic optimization method is then formulated using the reduced-order aeroelastic model. Results show that both dynamic and static loads play a role in optimization of the wing structure. Furthermore, the worst case gust loads change during the optimization process and it is important to identify the critical loads at every iteration in the optimization. Subject AeroelasticityComposite wingGust loadsStructural optimization To reference this document use: http://resolver.tudelft.nl/uuid:8566debb-0d09-4c2f-87b4-682bff36c854 DOI https://doi.org/10.1016/j.ast.2018.11.051 Embargo date 2020-12-12 ISSN 1270-9638 Source Aerospace Science and Technology, 85, 96-112 Part of collection Institutional Repository Document type journal article Rights © 2019 D. Rajpal, E. Gillebaart, R. De Breuker Files PDF Final_Manuscript.pdf 6.28 MB Close viewer /islandora/object/uuid:8566debb-0d09-4c2f-87b4-682bff36c854/datastream/OBJ/view