Analysis of Acoustic Interaction Effect on the Resonance State of Plane Systems of Piezoceramic Radiators

The results of studies of the effect of acoustic interaction in flat systems of cylindrical piezoceramic radiators with a liquid filling, due to the multiple exchange of radiated and reflected sound waves between the elements of the systems during the formation of their acoustic fields in the surrounding space to the resonance state of these systems are presented. In the computational model of the planar system the relations between the electric, mechanical and acoustic fields of the piezoceramic radiators in the process of energy transformation and their acoustic interaction during the formation of the acoustic field of the system are taken into account. The result of such interaction of the cylindrical piezoceramic radiators with their radial-symmetric electric excitation in the system is the breaking of radial symmetry of acoustic load that depends on many characteristics of the system. It is found that due to the breaking of this symmetry in mechanical fields of radiators of the system new forms of oscillations following the main one are generated, and there is an effective redistribution of energy between them which is “pumped” into radiator at the used variant of their electrical excitation only by the main form of oscillations. It is shown that this phenomenon causes appearance of number of new resonances in the oscillation spectrum of the planar system and essential changes of amplitudes and phases of full oscillation velocities of their radiators which depend on location of radiators in the planar system, wave sizes of radiators and system, physical characteristics of fluids filling the radiators, and frequency range.