Electric field forced vibration of a periodic piezocomposite plate with laminated structure and reflection and transmission of a plane wave at the fluid-composite interface

We address the problems of the vibration of a periodic piezocomposite plate (2-2 composite) under external electric fields and the reflection and transmission of a plane wave incident on the fluid-composite interface based on an analytical method developed recently, which takes into account explicitly the heterogeneous nature of the piezocomposites. It is shown that due to the finite thickness of the composite plate, a series of piezo-active modes at frequencies near and above the stop band edge mode frequency may be excited. It is also shown that, as a result of the heterogeneous structure of the composite, the reflection coefficient from the fluid-composite interface is a complex number, which should have important implication on the design of the quarter wave matching layer in composite transducers