Design of fluid-loaded piezoelectric transducers for acoustic power considerations

Karl Grosh; Yuan Lin; Emilio C. Nelli Silva; Noboru Kikuchi

doi:10.1117/12.316313

24 July 1998 Design of fluid-loaded piezoelectric transducers for acoustic power considerations

Karl Grosh, Yuan Lin, Emilio C. Nelli Silva, Noboru Kikuchi

Proceedings Volume 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures; (1998) https://doi.org/10.1117/12.316313
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

In this paper, a design methodology for enhancing the acoustic power radiated from fluid-loaded piezoelectric transducers at a particular operating frequency is developed. For many applications the operating frequency is fixed by the absorption of the material and the desired depth of penetration (e.g., therapeutic ultrasound). For therapeutic ultrasound and other industrial applications, the acoustic power is the critical figure of merit. The acoustic power radiated from the transducer system is computed from a finite element formulation of the coupled acoustic, elastic, piezoelectric equations of motion. The sensitivities of the acoustic power to two design variables: the length of the piezoelectric element and the thickness of the matching layer, are derived. Using these sensitivities, a novel design methodology in which remeshing is avoided is developed and the effectiveness of the method is studied. Results from the application of this framework for transducer design demonstrate the dramatic increase in radiated power possible from this two member design space.

Citation Download Citation

Karl Grosh, Yuan Lin, Emilio C. Nelli Silva, and Noboru Kikuchi "Design of fluid-loaded piezoelectric transducers for acoustic power considerations", Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); https://doi.org/10.1117/12.316313

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