EXPERIMENTAL CHARACTERIZATION OF THE VIBRATIONAL BEHAVIOR OF A FLUID-FILLED THIN SHELL FOR THE PURPOSE OF RESPONSE ESTIMATION

Abstract

Experimental techniques are proposed for developing a model to estimate structural vibrations induced by internal acoustic pressure at low frequencies. In these methods, the acoustic field and the structure are treated as a coupled system with the acoustic loading effect taken into account. The response model between the internal pressure and the surface vibration is established by a modified modal test on the coupled system. Experiments are performed to investigate the surface vibrations of a closed steel cylindrical shell excited by a loudspeaker inside. The experimental results show that developed techniques provide accurate estimation for the acoustically induced vibrations. (C) 1995 Acoustical Society of America.