Acoustic Radiation of a Water-Filled Piezoelectric Cylinder near a Rigid Plane

The combined finite-element-boundary-element method is used to solve the problem on the radiation of a water-filled piezoceramic cylinder positioned near an infinite plane. For the case of a perfectly rigid plane, the frequency characteristics of the transmitting response of the piezoelectric cylinder are obtained along with the frequency characteristics of the acoustic power, the directional characteristics, and the velocity and pressure distributions over the radiating cylindrical surfaces. It is found that, when the distance between the plane and the piezoelectric cylinder is small relative to the wavelength, the frequency characteristics of the cylinder and the velocity and pressure distributions noticeably differ from those obtained for a piezoelectric cylinder in an infinite space. The effect of the antisymmetric mode, which appears at small wave distances between the cylinder and the plane, on the characteristics of a water-filled piezoelectric cylinder is considered.