Abstract
A cylindrical piezoelectric transformer with an imperfect interface operating with thickness-shear modes is used within the three-dimensional equations of piezoelectricity. The shear–slip interface model is used to simulate the effect of viscoelastic imperfect interface. The influence of interface parameters on the transforming ratio, input admittance, power density, efficiency, and the displacement and stress distributions along the radius direction is discussed. Numerical results show that the weak interface lowers the performance of the transformer overall, which may provide theoretical guidance for the design of piezoelectric transformers.
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