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The transient interaction between a spherical acoustic wave and an elastic cylindrical shell containing an internally attached multidegree-of-freedom mechanical system is investigated within the limits of linear theory. Numerical results are obtained for the transient response of a spherical pressure-wave excited submerged shell containing a two-degree-of-freedom mechanical system. The interaction problem was solved using integral transform techniques. Both a series solution and an asymptotic solution for early time interaction were obtained, and good agreement was obtained between these two solutions. [ABSTRACT FROM AUTHOR]

The problem of the transient interaction of plane pulse waves and an elastic spherical shell is solved exactly within the scope of linear acoustic and thin shell theories and within the limit of series solution. Detailed numerical results for the transient and vibratory responses of the shell are presented, and some interesting features of the transient wave shell interaction are revealed. [ABSTRACT FROM AUTHOR]

The transient process in acoustic fields generated by the time-dependent motion of an arbitrary body submerged in an infinite, inviscid, and slightly compressible fluid is formulated by the source-density method. The governing equations of the source density are solved exactly for the acoustic field generated by the arbitrarily time-dependent motion of a rigid, circular baffled piston in a rigid infinite plane. In the general case, a numerical method of predicting the transient pressure field is developed according to the source-density formulation. Three numerical examples are presented to demonstrate the versatility of the method. The numerical method proves to be useful for small values of time. However, for large values of time, the error introduced in the numerical solution becomes unacceptably large and the method is no longer valid. [ABSTRACT FROM AUTHOR]