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

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (21) : 125-130.

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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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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.

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

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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