On the Design and Aeroelastic Stability Analysis of Twin Wing-Tail Boom Configuration Unmanned Air Vehicle

2011-04-07
Özöztürk, Sedat
Kayran, Altan
Alemdaroğlu, Hüseyin Nafiz
Seber, Güçlü
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The article presents the design and aeroelastic stability analysis of a composite, twin wing-tail boom configuration unmanned air vehicle. In the first part of the article emphasis is placed on the description of the structural layout and the materials used in the sandwich construction of the sub-structures to generate a reliable MSC/Nastran finite element model which is used in the detailed aeroelastic stability analysis. In the second part of the article detailed aeroelastic stability analyses are conducted by adding one sub-structure at a time to the aeroelastic model. Specifically, aeroelastic models which are used are the wing only, wing-tail plane combination, complete air vehicle with and without wing control surfaces. With such a study it is intended to address the effect each sub-structure added to the aeroelastic model on the critical aeroelastic stability modes and speeds, and to see how sensitive the aeroelastic stability modes and speeds are to model fidelity. During the course of aeroelastic analyses different splining methods, aerodynamic modeling alternatives, the choice of spline points, structural and aerodynamic grid refinement effects and the effect of uncertainties in the material properties are also evaluated. Results suggest that flutter speeds obtained with a reasonably coarse structural/aerodynamic grid tend to be conservative and the use of infinite plate spline method gives consistently lower critical speeds compared to the finite plate spline method. Results also show that addition of the tail plane into the aeroelastic model introduces new flutter modes in the speed regime of interest whereas addition of the fuselage structure into the aeroelastic model does not affect the flutter modes appreciably.
https://hdl.handle.net/11511/79764
52th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Department of Aerospace Engineering, Conference / Seminar

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Citation Formats
S. Özöztürk, A. Kayran, H. N. Alemdaroğlu, and G. Seber, “On the Design and Aeroelastic Stability Analysis of Twin Wing-Tail Boom Configuration Unmanned Air Vehicle,” presented at the 52th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2011, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/79764.
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