Abstract
The construction of the piezoelectric generator (PEG) for the energy storage device has a significant effect on the electromechanical conversion characteristics, and the optimal choice of its geometric parameters is an important prerequisite for ensuring efficiency of the electromechanical conversion. This article discusses a PEG model based on circular three-layer plate in the ANSYS package. Two piezoactive layers, piezoelectric and piezomagnetic, are glued to a steel substrate. The program built in the MATLAB package allows to control ANSYS scripts to find the dependence of the electromechanical coupling coefficient on the geometric parameters of the object. The genetic algorithm is used to determine the maximum value of the electromechanical coupling coefficient when changing the radius and thickness of the layers within certain limits. Thus, a set of geometric dimensions is determined to achieve the best PEG energy conversion efficiency. After applying the optimization algorithm, the electromechanical coupling coefficient increases by 34% in comparison with the results of previous studies.
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