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1 Journal of Technical Physics

1 1999

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Regular and chaotic vibrations of an airfoil in supersonic flow

Dżygadło Z., Nowotarski I., Olejnik A.

Journal of Technical Physics

1999

Vol. 40, no 1

117-143

An airfoil in supersonic flow, having deformable nonlinear supports, is an aeroelastic system for which various types of bifurcation and regular or chaotic motions can appear. The airfoil has two degrees of freedom - that is, plunge dispalcement and angle of pitch displacement. The stiffness force and moment for those motions are assumed to be nonlinear ones. The airfoil is subjected to the pressure difference produced by its motion in supersonic flow. Types of bifurcation 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 nonlinear vibrations has been studied.