Effects of Aeroelastic Nonlinearity on Flutter and Limit Cycle Oscillations of High-Aspect-Ratio Wings

Keivan Eskandary; Morteza Dardel; Mohammad Hadi Pashaei; Abdol Majid Kani

doi:10.4028/www.scientific.net/AMM.110-116.4297

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 110-116Effects of Aeroelastic Nonlinearity on Flutter and...

Effects of Aeroelastic Nonlinearity on Flutter and Limit Cycle Oscillations of High-Aspect-Ratio Wings

Abstract:

In this study aeroelastic characteristics of long high aspect ratio wing models with structural nonlinearities in quasi-steady aerodynamics flows are investigated. The studied wing model is a cantilever wing with double bending and torsional vibrations and with large deflection ability in according to Dowell-Hodges wing model. This wing model is valid for long, straight and thin homogeneous isotropic beams. Aerodynamics model is based on quasi-steady aerodynamic which is valid for aerodynamic flows in low velocity and without wake, viscosity and compressibility effects. The effect of different parameters such as mass ratios and stiffness ratios on flutter and divergence velocities and limit cycle oscillation amplitudes are carefully studied.

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Periodical:

Applied Mechanics and Materials (Volumes 110-116)

Pages:

4297-4306

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.110-116.4297

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Online since:

October 2011

Authors:

Keivan Eskandary, Morteza Dardel, Mohammad Hadi Pashaei, Abdol Majid Kani

Keywords:

Double Bending Vibrations, Flutter, High Aspect Ratio Wing, Limit Cycle, Quasi-Steady Aerodynamic, Torsional Vibration

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