Sound radiation induced force vibration of submerged and fluid filled multilayered spherical shell

Abstract

Nowadays sound radiation from spherical shells is attracted for aviation industry. In this paper, the general approach is presented for predicting a coupled fluid solid interaction problem. Therefore, a fully elasticity solution is applied in conjunction with laminated shell model for considering of the sound field over the shell. For each plies the elasticity coefficients are assumed to be constant. The main objectives of this work are investigating the influence of internal and external acoustic mediums and also radially inhomogeneity on acoustic performance of the spherical shell. Numerical results are presented for a three layered spherical shell. For each excitation frequency, sound pressure over zenith angle in polar coordinate is plotted. Also pressure levels against excitation frequency for resonance spectroscopy are investigated.