A numerical algorithm for analyzing the planar nonstationary axisymmetric vibrations of piezoceramic circular plates polarized across the thickness and subject to electric excitation is developed. The dynamic characteristics of a ring plate are analyzed. The dependence of the behavior of its nonstationary vibrations on the frequency of the instantaneously applied electric potential and the ratio of outer and inner radii is established Keywords: piezoelectric ring plate, nonstationary electroelastic vibrations, electric excitation, numerical methodIntroduction. Piezoelectric plates are the most widespread electromechanical transducers operating within a wide frequency range under impulsive electric and mechanical excitation [2, 5, 8, 15, 16, etc.]. Experimental and theoretical studies of their dynamic characteristics are reported in numerous scientific publications, which are mainly focused on stationary harmonic vibrations and resonant frequencies [1, 2, 9, 13, 14, etc.]. Aspects of the nonstationary vibrations of circular disks were analyzed in [3,11] regardless of the coupling of the fields. The vibrations of piezoceramic bodies polarized across the thickness and subjected to nonstationary loads were studied in [6,7,10,12], naturally neglecting the influence of the in-plane configuration of transducers on the wave processes. For thin transducers, this omission can be remedied by considering the plane stress state and linear distribution of electric potential over the thickness [1,2,4,6,15]. We will use such a problem statement to study the dynamic axisymmetric electromechanical state of thin circular piezoceramic plates polarized across the thickness and subjected to electric excitation. Three numerical algorithms will be analyzed.
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