Author(s)

G. Curti and F. Cura

Abstract

The subject of this paper is the experimental analysis of a fluid-structure coupled system. The experimental model consists of a steel box closed at one end by a rectangular flexible steel panel. The back wall of the box, opposing the flexible panel, is a hard steel piston which can be moved along the axis of the cavity in order to vary its length and therefore its resonance frequencies. The structural excitation of the coupled system is provided by an electrodynamic shaker. Three microphones, located inside the cavity near the back rigid walls, measure the acoustic pressure along three directions, while the acceleration of the flexible plate is measured by an accelerometer applied near to its centre. The force, pressure and acceleration signals are processed for the evaluation of thep/F and a/F to determine both

Keywords