Active underwater acoustic control of polymer based piezoelectric composites

Acoustic stealt of the submarin has always been the most valuable research field for Security Department of the Navy over the world. In this paper, the feasibility of underwater anechoic coating with the polymer matrix piezoelectric composite material has been studied. On the basis of the Thomson-Haskell matrix method, we have derived the reflected transform matrix and calculated a semi-analytical solution to the problem by using the MATLAB. It is found that the underwater anechoic effects of this new material are related to the material proportion of each composites, the control voltage, geometric parameters, incident angle and frequency and so on. The studies have showed that: the polymer matrix piezoelectric composite material takes the advantages of both the viscoelastic material and the piezoelectric material and the use of the new material has a superior nature than the traditional materials to the suppression of underwater acoustic reflection.