Nonlinear aeroelasticity of rotating and flapping wings - a review

Ganguli, Ranjan (2010) Nonlinear aeroelasticity of rotating and flapping wings - a review. In: Proceedings of the National Academy of Sciences, India - Section A, 80A (Part 2). pp. 97-108.

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Abstract

The interaction between large deflections, rotation effects and unsteady aerodynamics makes the dynamic analysis of rotating and flapping wing a nonlinear aeroelastic problem. This problem is governed by nonlinear periodic partial differential equations whose solution is needed to calculate the response and loads acting on vehicles using rotary or flapping wings for lift generation. We look at three important problems in this paper. The first problem shows the effect of nonlinear phenomenon coming from piezoelectric actuators used for helicopter vibration control. The second problem looks at the propagation on material uncertainty on the nonlinear response, vibration and aeroelastic stability of a composite helicopter rotor. The third problem considers the use of piezoelectric actuators for generating large motions in a dragonfly inspired flapping wing. These problems provide interesting insights into nonlinear aeroelasticity and show the likelihood of surprising phenomenon which needs to be considered during the design of rotary and flapping wing vehicle

Item Type:	Journal Article
Publication:	Proceedings of the National Academy of Sciences, India - Section A
Publisher:	Natl Acad Sciences India
Additional Information:	Copyright of this article belongs to Natl Acad Sciences India.
Keywords:	aeroelasticity; nonlinear; rotorcraft; flapping wing; vibration
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	11 Jan 2011 08:17
Last Modified:	11 Jan 2011 08:17
URI:	http://eprints.iisc.ac.in/id/eprint/28963

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