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Unified Formulation of the Aeroelasticity of Swept Lifting SurfacesAn unified approach for dealing with stability and aeroelastic response to time-dependent pressure pulses of swept wings in an incompressible flow is developed. To this end the indicial function concept in time and frequency domains, enabling one to derive the proper unsteady aerodynamic loads is used. Results regarding stability in the frequency and time domains, and subcritical aeroelastic response to arbitrary time-dependent external excitation obtained via the direct use of the unsteady aerodynamic derivatives for 3-D wings are supplied. Closed form expressions for unsteady aerodynamic derivatives using this unified approach have been derived and used to illustrate their application to flutter and aeroelastic response to blast and sonic-boom signatures. In this context, an original representation of the aeroelastic response in the phase space was presented and pertinent conclusions on the implications of some basic parameters have been outlined.
Document ID
20010032416
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Silva, Walter (NASA Langley Research Center Hampton, VA United States)
Marzocca, Piergiovanni (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Librescu, Liviu (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Aerodynamics
Funding Number(s)
CONTRACT_GRANT: NAG1-2281
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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