TRANSIENT RADIATION BY A SYSTEM OF TWO CYLINDRICAL SHELLS

We consider the acoustic field radiated by a system of two submerged co-axial cylindrical shells with fluid filling the inter-shell space. We propose a semi-analytical solution to the problem, and then use it to simulate the interaction of the system with an external acoustic pulse. We demonstrate that the acoustic field radiated by the two-shell system is to a large degree dominated by the multiple reflections of the waves propagating in the inter-shell volume off the surfaces of the shells, and that the effect of the inner shell is strongly manifested in the structure of the acoustic pattern observed in the outer fluid domain