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The acoustic reflected pressure from a periodic elastic/piezoelectric laminated plateis studied for the purpose of acoustic reflection control.A finite difference/boundary integralprocedure to determine the reflected pressure from the fluid-loaded plate is described.In thenumerical model,a Green’s function in the form of infinite sum is employed and a boundaryintegral is performed to replace the fluid pressure at fluid/solid interface by a continuum of pointsources weighted by the normal acceleration of the elastic plate.The equation system is thensolved only in the solid domain.It is demonstrated that an appropriate applied voltage potentialacross the piezoelectric layer has the effect of cancelling the fundamental propagating mode,andthere,is no reflection for frequencies up to the cut-off frequency of the next propagating mode ifthe fundamental mode has been eliminated.
The acoustic reflected pressure from a periodic elastic / piezoelectric laminated plate is studied for the purpose of acoustic reflection control. A finite difference / boundary integralprocedure to determine the reflected pressure from the fluid-loaded plate is described. Thenumerical model, a Green’s function in the form of infinite sum is employed and a boundary integral is performed to replace the fluid pressure at fluid / solid interface by a continuum of points of weighted by the normal acceleration of the elastic plate. that an appropriate applied voltage potentialacross the piezoelectric layer has the effect of canceling the fundamental propagating mode, and where, no reflection for frequencies up to the cut-off frequency of the next propagating mode if the fundamental mode has been eliminated.