Analysis of a smart linear piezoelectric transducer

Keith A. Seffen

doi:10.1117/12.388862

22 June 2000 Analysis of a smart linear piezoelectric transducer

Keith A. Seffen

Proceedings Volume 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems; (2000) https://doi.org/10.1117/12.388862
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

A preliminary investigation of a novel transducer proposed for digital loudspeaker technology is presented. The transducer comprises a piezoelectric, helicoidal structure that wraps round an inflated, elastomeric torus with a lightweight cylindrical core element mounted on the inside. As the helix is deformed by application of an electric field along its length, linear motion of the core is actuated. An axisymmetric finite-element model is presented to account for inflation of the torus against the outer helix and to demonstrate core motion. The interaction of surfaces in contact is studied in a hyperelastic framework using a double cylinder model, which produces favorable predictions of the actuating forces from finite element analysis. A finite-element model of the helix demonstrates primary aspects of deformation that are utilized in formulating a much simpler single-layer analysis by a variational strain-energy approach; a correlation to experiment is observed.

Citation Download Citation

Keith A. Seffen "Analysis of a smart linear piezoelectric transducer", Proc. SPIE 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems, (22 June 2000); https://doi.org/10.1117/12.388862

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