Sound radiation by cylindrical piezoceramic hydroacoustic transducer with dynamically controlled parameters
DOI:
https://doi.org/10.34169/2414-0651.2021.1(29).64-70Keywords:
piezoceramic transducer of complex design, dynamic electrical excitationAbstract
The existing approaches to control of parameters of hydroacoustic antennas and transducers that are a part of hydroacoustic stations are analyzed. It is shown that the use of the electrical side of the transducers is the basis of operational methods of dynamic control of the parameters of hydroacoustic transducers. The scheme of construction of the cylindrical piezoceramic hydroacoustic transducer which parameters can be dynamically controlled in the course of operation by means of operative change of amplitudes and phases of electric excitation of external and internal asymmetrically placed piezoceramic covers of the transducer is offered. In such a transducer, each of the shells performs two functions – energy conversion and the formation of acoustic energy in the environment. A feature of the first function for piezoceramic shells is the interconnection of electric, mechanical and acoustic fields.
The peculiarity of the second function is the interaction of the acoustic fields of the first and second shells in the intershell space, associated with the repeated exchange between them of radiated and reflected sound waves. The presence of an acoustic field in both of these features connects the processes of energy conversion and its formation in each of the piezoceramic shells, as well as the transducers as a whole. The method of connected fields in multiconnected domains solves the end-to-end problem of sound radiation by such a transducer and analytical relations are obtained to quantify the parameters of its acoustic, mechanical and electrical dynamic fields. The calculated expressions for the further quantitative estimation of parameters of acoustic, mechanical and electric fields at operative change of amplitudes and phases of the electric voltages exciting piezoceramic covers of hydroacoustic transducers are received.
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