一种埋入型PZT的三维等效机电阻抗模型——第二部分:应用

左春愿;冯新;周晶

振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 125-130.

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PDF(1626 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 125-130.
论文

一种埋入型PZT的三维等效机电阻抗模型——第二部分:应用

  • 左春愿,冯新,周晶
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A THREE-DIMENSIONAL MODEL OF EFFECTIVE ELECTROMECHANICAL IMPEDANCE FOR EMBEDDED PZT TRANSDUCERS——Part Ⅱ: Applications

  • Zuo Chunyuan, Feng Xin, Zhou Jing
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文章历史 +

摘要

基于建立的三维等效机电阻抗模型,文献的第一部分得到了PZT与结构耦合的电导纳方程。第二部分根据这一方程提出了应用机电阻抗(EMI)技术监测结构固有属性的改进方法。该方法通过PZT与结构耦合的电导纳方程,从实测的耦合电导纳信号中提取出结构等效机械导纳。利用获得的结构机械导纳曲线,来监测结构固有属性。基于该方法,对埋入有PZT传感器的早龄期混凝土梁的固有属性进行了监测。试验结果表明,利用结构机械导纳来监测结构固有属性是可行的,比原始电信号更加敏感有效。

Abstract

Based on the proposed three-dimensional model of the effective electromechanical impedance,the electromechanical admittance equation was derived in part Ⅰ of the companion papers. By using the theory of the effective electromechanical impedance, a novel methodology for monitoring structural inherent properties is proposed in this paper. The effective mechanical admittance of the host structure is extracted from the measurement of the coupled electromechanical admittance, and then structural mechanical admittance is used to monitor the structural inherent properties. To investigate the feasibility of the proposed approach,a lab-scale concrete beam was utilized to monitor the strength gain during the curing age with the variations in the measurements of the effective electromechanical impedance. The results demonstrate the efficiency and feasibility of the proposed method.

关键词

结构健康监测 / 埋入型PZT传感器 / 机电阻抗(EMI)技术 / 混凝土强度监测

Key words

structural health monitoring / embedded PZT transducer / electromechanical impedance (EMI) technique / concrete strength monitoring

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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——第二部分:应用[J]. 振动与冲击, 2014, 33(21): 125-130
Zuo Chunyuan;Feng Xin;Zhou Jing. A THREE-DIMENSIONAL MODEL OF EFFECTIVE ELECTROMECHANICAL IMPEDANCE FOR EMBEDDED PZT TRANSDUCERS——Part Ⅱ: Applications [J]. Journal of Vibration and Shock, 2014, 33(21): 125-130

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