Abstract
Mechanical components of sandwiched piezoelectric transducers are modeled usingone-dimensional wave transmission and piezoelectric equations. Using the impedancemethod, resonance frequencies, stress and displacement distributions along the multilayeredpiezoelectric transducers of different dimensions and materials are obtained. Thecalculated resonance frequencies and the impedances are experimentally verified. Forultrasonic welding of plastics, the effect of the parts to be welded on the resonancefrequency of the whole system is investigated regarding both material damping andpiezoelectric losses. Using the methods developed, several piezoelectric transducers areanalysed for different designs. The obtained results can be used to better understandthe qualitative relations between the design variables of ultrasonic piezoelectrictransducers.
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