Abstract
The paper deals with the dynamic forces and oscillations of vertical-lift rectangular gates submerged in freesurface flow. In the range of low reduced velocities investigated here (VT < 5) the oscillations were found to be excited by the vortices due to the dynamic interaction between the elastic gate and the unstable shear layer underneath the gate. Spectral analysis of the excitation-force and gate-response signals permitted identification of the main characteristics of the interaction process. The main similitude parameters governing this hydroelastic phenomenon are shown to be the reduced velocity and the mass-damping coefficient. The study permits a number of general conclusions to be drawn regarding model tests on vibrating structures.
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