Dynamic Response of Highly Flexible Flying Wings

This paper presents a method to model and analyze the coupled nonlinear flight dynamics and aeroelasticity of highly flexible flying wings. A low-order nonlinear strain-based finite element framework is used, which is capable of capturing the fundamental impact of geometrically nonlinear effects in...

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Bibliographic Details
Published in:AIAA journal 2011-02, Vol.49 (2), p.324-339
Main Authors: Su, Weihua, Cesnik, Carlos E. S
Format: Article
Language:English
Subjects:
Aerodynamics
Applied fluid mechanics
Applied sciences
Computer science
control theory
systems
Control theory. Systems
Design
Effects
Exact sciences and technology
Finite element analysis
Flexibility
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Robotics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:This paper presents a method to model and analyze the coupled nonlinear flight dynamics and aeroelasticity of highly flexible flying wings. A low-order nonlinear strain-based finite element framework is used, which is capable of capturing the fundamental impact of geometrically nonlinear effects in a computationally effective formulation target for preliminary vehicle design and control evaluation. A simple model to capture the change in the wing torsional stiffness due to skin wrinkling arising from large bending curvatures is proposed. Finite-state unsteady subsonic aerodynamics with simplified stall models are incorporated to complete the aeroelastic representation of flying wings. In studying the flying wing dynamic response, a spatially and temporally distributed discrete gust model is introduced. With the proposed formulations, numerical studies are conducted based on a representative highly flexible flying wing subjected to finite disturbances. [PUBLICATION ABSTRACT]
ISSN:0001-1452
1533-385X
DOI:10.2514/1.J050496