Modeling of a rod piezoelectric transducer to optimize its geometric parameters

Rod piezoceramic transducers under load on the water environment have a comparatively narrow bandwidth and low efficiency due to poor matching. One of the possible ways to improve the matching of the transducer with the environment is based on the use of pads. In this paper, a composite piezoceramic transducer with a back and radiating pad (Tonpilz type transducer) is considered. Finite element modeling was performed using COMSOL Multiphysics software to optimize the geometric parameters of the transducer. Experimental studies were carried out using a unique scientific installation «Simulation-natural hydroacoustic complex». It was established that after polymerization of the adhesive composition, the bandwidth of the transducer expanded from 1.29 to 8.7 % and shifted to the low-frequency range. When loading the radiating surface with a polyurethane layer, the bandwidth significantly expanded to 20.78 %. The research results show the critical influence of technological factorson the electroacoustic characteristics of composite transducers.

Authors: H. K. Alsaeed, P. P. Pivnev, V. I. Kalyuta

Direction: Physics

Keywords: tonpilz type transducer, rod piezoelectric transducer 1–3, finite element modeling, electro acoustic characteristics, sonar

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