Abstract
An overview of the use of time-domain methods to analyze the mechanical response of fluid loaded structures invacuo and in fluid is presented. The response of a single degree of freedom mechanical oscillator will first be addressed and then used to build the solution to more complex plate and shell vibration problems using well established time-dependent eigenfunction or eigenvector expansions. In contrast to the invacuo problems in which the modal coefficients are uncoupled convolution integrals, the coefficients for the fluid-loaded problems are shown to be described by a set of coupled convolution integral equations. The underlying physics that naturally leads to the coupled convolution integral equations will be discussed. Direct time-domain methods of evaluating the convolution integrals and solving the convolution integral equations will be presented and discussed. Finally, numerical results will be presented for both in-vacuo and in-fluid plate and shell problems to illustrate typical response characteristics.
Published Version
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