Theoretical analysis of dynamic property for piezoelectric cantilever triple-layer benders with large piezoelectric and electromechanical coupling coefficients
作者： Li Jiao Gong , Cheng Liang Pan , Qiao Sheng Pan , Zhi Hua Feng
DOI: 10.1142/S2010135X1650017X
关键词: Piezoelectric accelerometer 、 Piezoelectric coefficient 、 Piezoelectric motor 、 Bending 、 Acoustics 、 Piezoelectric sensor 、 PMUT 、 Piezoelectricity 、 Materials science 、 Electromechanical coupling coefficient
摘要: Ferroelectric single crystals, such as PZN-PT, provide novel prospects in piezoelectric bending devices actuators, sensors or energy harvesters because of their extraordinarily large coefficients. However, errors may occur some analyses on electromechanical behaviors using the conventional models. We find rigidity composited bender is affected not only by thickness, width and modulus elasticity different layers but also coupling coefficients (EMCCs) material larger EMCCs mean more marked effect. This paper focuses derivation applied input excitation output response characteristics circular frequency domain for cantilever triple-layer benders (PCTBs), taking into account secondary Analytic dynamic descriptions actuators transducers are obtained. Based presented models features PCTB composed PZN-8%PT calculated, numerical results coincide with simulations finite element method (FEM).
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