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Type: Artigo de evento
Title: Resonance Frequencies Of The Multilayered Piezotransducers
Author: Arnold F.J.
Abstract: Piezoelectric transducers used in high power ultrasonic applications are composed of piezoelectric ceramics, metallic blocks and a central bolt that pre-stresses the assembly. The characterization of these transducers has been done by using numerical methods but, in many cases, simplified one-dimensional models are enough to a good physical interpretation of the problem. In this work it was used Masonś equivalent electric circuit for onedimensional modeling of composed transducers. It was employed Théveninś equivalent circuit to simplify the problem and evaluate the effects of the central bolt on the resonances. Some transducers were mounted and their resonance frequencies were measured. The results show a good fitting between the experimental and the calculated data. By using the presented model, with bolt included, it was verified that other new longitudinal vibration modes occur. This fact enhances the possibility of analysis of the behavior of transducers through the frequency spectrum.
Rights: fechado
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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