Bifurcation in a 3-DOF Airfoil with Cubic Structural Nonlinearity |
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| Authors: | Saied IRANIHamid SARRAFZADEH Mohammad Reza AMOOZGAR |
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| Institution: | Saied IRANIHamid SARRAFZADEH,Mohammad Reza AMOOZGAR Department of Aerospace Engineering,K.N.Toosi University of Technology,Tehran 19697,Iran |
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| Abstract: | Limit cycle oscillations (LCOs) as well as nonlinear aeroelastic analysis of a 3-DOF aeroelastic airfoil motion with cubic restoring moments in the pitch degree of freedom are investigated.Aeroelastic equations of an airfoil with control surface in an incompressible potential flow are presented in the time domain.The harmonic balance (HB) method is utilized to calculate the LCO frequency and amplitude for the airfoil.Also the semi-analytical method has revealed the presence of stable and unstable limit cycl... |
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| Keywords: | flutter bifurcation cubic nonlinearity limit cycle oscillations harmonic balance method |
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