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 Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/17433

 Title: Aerostructural Optimization of Non-planar Lifting Surfaces Authors: Jansen, Peter Willi Advisor: Martins, Joaquim R. R. A. Department: Aerospace Science and Engineering Keywords: Aero-structural DesginMultidisciplinary OptimizationNumerical OptimizationNon-planar Lifting Surfaces Issue Date: 14-Jul-2009 Abstract: Non-planar lifting surfaces offer potentially significant gains in aerodynamic efficiency by lowering induced drag. Non-aerodynamic considerations, such as structures can impact the overall efficiency. Here, a panel method and equivalent beam finite element model are used to explore non-planar configurations taking into account the coupling between aerodynamics and structures. A single discipline aerodynamic optimization and a multidisciplinary aerostructural optimization are investigated. Due to the complexity of the design space and the presence of multiple local minima, an augmented Lagrangian particle swarm optimizer is used. The aerodynamic optimum solution found for rectangular lifting surfaces is a box wing, while allowing for sweep and taper yields a joined wing. Adding parasitic drag in the aerodynamic model reduces the size of the non--planar elements. The aerostructural optimal solution found is a winglet configuration when the span is constrained and a wing rake when there is no such constraint. URI: http://hdl.handle.net/1807/17433 Appears in Collections: MasterInstitute for Aerospace Studies - Master theses

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