On Turbulence-Induced Vibrations of a Thin Ribbon With Velocity-Dependent Damping

Abstract

Results of an experimental study of the turbulence-induced random vibrations of a thin metal ribbon show that an interaction between the vibrating surface and the turbulence exists which results in an increase in the turbulent energy within the boundary layer. In addition, the system damping is shown to vary with the free-stream velocity and to be proportional to the amplitude response of the ribbon. The experimental data and an accompanying theoretical analysis give support to the belief that the damping is primarily a velocity-squared type which is characteristic of a flat plate vibrating normally in a fluid.