一种埋入型PZT的三维等效机电阻抗模型——第一部分：理论

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 119-124.

论文

一种埋入型PZT的三维等效机电阻抗模型——第一部分：理论

左春愿，冯新，周晶

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A THREE-DIMENSIONAL MODEL OF EFFECTIVE ELECTROMECHANICAL IMPEDANCE FOR EMBEDDED PZT TRANSDUCERS——Part Ⅰ: Theory

Zuo Chunyuan, Feng Xin, Zhou Jing

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文章历史 +

摘要

基于压电陶瓷(PZT)圆片三维耦合振动原理，建立了埋入型PZT传感器与基体结构相互作用的三维等效机电阻抗模型，扩大了机电阻抗(EMI)技术的应用范围。通过引入等效机械阻抗，利用压电材料的压电效应，得到了PZT与结构耦合的电导纳方程。这一方程明确体现了PZT机械阻抗与结构机械阻抗对耦合电导纳的贡献。由此电导纳方程，可以得到自由PZT电导纳曲线，为结构等效机械阻抗的提取提供了基础。

Abstract

A three-dimensional effective electromechanical impedance model for embedded PZT transducer is proposed by considering the coupled vibration effect between the piezoelectric ceramic (PZT) patch and the host structure. The coupled electromechanical admittance equation is derived by adopting the concept of effective mechanical impedance for the piezoelectric materials. The equation contains the contributions not only from PZT but also from the host structure. The theoretical electromechanical admittance of PZT in the free-free condition can be obtained by the equation, which is then utilized to extract the effective mechanical impedance of the structure.

导出引用

左春愿;冯新;周晶. 一种埋入型PZT的三维等效机电阻抗模型——第一部分：理论[J]. 振动与冲击, 2014, 33(21): 119-124

Zuo Chunyuan;Feng Xin;Zhou Jing. A THREE-DIMENSIONAL MODEL OF EFFECTIVE ELECTROMECHANICAL IMPEDANCE FOR EMBEDDED PZT TRANSDUCERS——Part Ⅰ: Theory [J]. Journal of Vibration and Shock, 2014, 33(21): 119-124