Numerical model of unsteady subsonic aeroelastic behavior

The present paper describes a numerical simulation of unsteady subsonic aeroelastic responses. The technique accounts for aerodynamic nonlinearities associated with angles of attack, vortex-dominated flow, static deformations, and unsteady behavior. The fluid and the wing together are treated as a s...

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Bibliographic Details
Published in:AIAA journal 1990-05, Vol.28 (5), p.903-909
Main Authors: Strganac, Thomas W, Mook, Dean T
Format: Article
Language:English
Subjects:
aeroelasticity
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
Structural Mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
vortices
wings
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Summary:The present paper describes a numerical simulation of unsteady subsonic aeroelastic responses. The technique accounts for aerodynamic nonlinearities associated with angles of attack, vortex-dominated flow, static deformations, and unsteady behavior. The fluid and the wing together are treated as a single dynamic system, and the equations of motion for the structure and flowfield are integrated simultaneously and interactively in the time domain. The method employs an interative scheme based on a predictor-corrector technique. The aerodynamic loads are computed by the general unsteady vortex-lattice method and are determined simultaneously with the motion of the wing. Two models are used to demonstrate the technique: a rigid wing on an elastic support experiencing plunge and pitch about the elastic axis and an elastic wing rigidly supported at the root chord experiencing spanwise bending and twisting.
ISSN:0001-1452
1533-385X
DOI:10.2514/3.25137