Acoustic Dynamic Properties of a Piezoceramic Transducer in the Presence of an Active Electroelastic Acoustic Screen

In acoustic location devices, the dynamic properties can be significantly changed if their acoustic screens are made in the form of electroelastic systems. Analytical expressions for the acoustic fields of location devices are defined for devices with cylindrical piezoceramic screens using the coupled field method in multi-coupled regions. They take into account the mutual relations of physical fields during energy conversion, the acoustic interaction of fields during their formation, and the interaction of energy conversion and formation processes. As a result of the analysis of the results of the numerical experiment, changes in the acoustic dynamic properties of the location devices were established when the amplitudes and phases of the electric excitation voltages in them are changed rapidly. A number of interesting frequency regularities in the dynamic properties of acoustic fields have been established. It is shown that the dynamic properties of location devices, which include acoustic screens, can be increased if they are built in the form of electromechanical oscillating systems. When piezoceramic materials are used in them, the physical fields of these devices will be formed under the action of three types of interaction that occur during the transformation of energy and its formation in the surrounding elastic media. Formulated physical and calculation models of the location device. Taking into account the interaction of physical fields during the transformation of energy, the acoustic interaction during its formation and the interaction of the processes of transformation and formation, analytical expressions for the calculation of physical fields were obtained. Based on the results of a numerical experiment for a location device with the same frequencies of the main resonance of the radiator and the screen, the possibilities of changing the dynamic acoustic properties of the device when changing the amplitude and phases of electrical excitation of its elements are established. The frequency ranges of the greatest impact of these changes are determined.