Abstract
A line-driven fluid-loaded elastic plate is considered. The plate response and radiated pressure field are obtained by a numerical evaluation of the Fourier integral representations of the solution for frequencies below and above coincidence. Below coincidence the plate response is dominated by a fluid-modified flexural wave that propagates to infinity undiminished in amplitude. The pressure field in the vicinity of the plate reveals distinctive pressure nulls due to an interference between a cylindrically spreading acoustic wave emanating at the drive line and the evanescent wave associated with the flexural wave. Above coincidence, the plate response decays exponentially, while the pressure field displays a directive lobe in the coincidence direction.
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