Sound Radiation From Submerged Cylindrical Shells of Finite Length

A method is presented for the evaluation of the pressure field which is induced in an acoustic fluid by the harmonic axisymmetrical excitation of a submerged thin elastic circular cylindrical shell of finite length. The approach utilizes dynamic influence coefficients from the in vacuo vibrations of the shell and a potential theory source approach for the fluid. Compatibility conditions on the shell-fluid interface allow the determination of the fluid-source strength coefficient and, subsequently, the pressure and/or velocity fields in the fluid. Provision is made for the inclusion of possible viscous-damping effects. Numerical results are presented for several structural configurations.