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1 Journal of Technical Physics

1 2000

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Nonlinear, regular and chaotic vibrations of an airfoil with a trailing and edge flap in supersonic flow

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Dżygadło Z. , Nowotarski I. , Olejnik A.

Journal of Technical Physics

2000

tom Vol. 41, no 3

219-229

An airfoil in supersonic flow, having deformable nonlinear supports, is an aeroelastic system for which various types of instability, bifurcations and regular or chaotic motions can appear. The airfoil has three degrees of freedom - that is, plunge displacement, angle of pitch and angle of flap deflection. The stiffness force and moments for all those motions are assumed to be nonlinear ones. The airfoil is subjected to the pressure difference produced by its motion in supersonic flow. Stability and bifurcations occurring in the system, limit cycles of self-excited vibrations and regions of regular or chaotic motions have been investigated. The effect of some parameters of the system on the course of linear and nonlinear vibrations has been studied.