An analytical investigation on the resonances of surface bonded piezoelectric wafer active transducers (PWaTs)

Haiying Huang

doi:10.1117/12.2585652

22 March 2021 An analytical investigation on the resonances of surface bonded piezoelectric wafer active transducers (PWaTs)

Haiying Huang

Author Affiliations +

Proceedings Volume 11591, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2021; 115911Y (2021) https://doi.org/10.1117/12.2585652
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

Piezoelectric wafer active transducers (PWaTs) play an important role for smart structures. Typically, they are bonded on the surface of structures to excite and sense mechanical vibrations or waves. The resonant characteristics of the surface bonded PWaT is very different from those of the free-standing PWaT. Since the resonances of the PWaTs strongly influence the transducer efficiency, it is important to understand their resonant behaviors. In this paper, an analytical model of the surface bonded PWaT is implemented to study the resonant characteristics of surface bonded PWaT in details. The study reveals that the PWaT supports two modes that have very different propagation constants below and above a cut-off frequency, leading to different resonance behaviors. These resonance behaviors can be explained with respect to the propagation of these two modes in the PWaT and the mode conversion at the edges of the PWaT. These fundamental understanding will benefit the design and optimization of the PWaTs.

Conference Presentation

Citation Download Citation

Haiying Huang "An analytical investigation on the resonances of surface bonded piezoelectric wafer active transducers (PWaTs)", Proc. SPIE 11591, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2021, 115911Y (22 March 2021); https://doi.org/10.1117/12.2585652

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