Generic impedance-based model for structure-piezoceramic interacting system
Generic impedance-based model for structure-piezoceramic interacting system
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DOI：
10.1061/(asce)0893-1321(2005)18:2(93
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发表时间：
2005-04-01
影响因子：
2.4
通讯作者：
Soh, CK
中科院分区：
文献类型：
--
作者：
Yang, YW;Xu, JF;Soh, CK
本文描述了一个通用的阻抗为基础的模型预测机电（EM）阻抗的一维（1D）和二维（2D）结构压电陶瓷（PZT）相互作用系统。首先分析了压电片的振动特性。主结构的影响，然后表示其力阻抗，这是通过一个半解析方法获得。最后，进行了实验梁和板，分别模拟一维和二维问题。结果表明，结构-PZT相互作用系统的电磁阻抗预测值与实验测量值吻合得很好。结果表明，预测的峰值匹配的主机结构的固有频率。由主结构和PZT贴片之间的相互作用引起的固有频率的非常小的偏移的峰值表明，小尺寸的PZT贴片可以永久地粘结到结构上用于在线健康监测，而不会改变结构的机械性能太多。研究结果表明，所提出的基于阻抗的一般结构-压电陶瓷相互作用系统模型可用于结构健康监测。
This paper describes a generic impedance-based model for predicting the electromechanical (EM) impedance of one-dimensional (1D) and two-dimensional (2D) structure-piezoceramic (PZT) interacting systems. The vibration of a PZT patch is first analyzed. The effect of the host structure is then represented by its force impedance, which is obtained by a semianalytical method. Finally, experiments are carried out on beams and plates to simulate 1D and 2D problems, respectively. It is found that the predicted EM impedance of the structure-PZT interacting system coincides very well with the experimentally measured data. The results show that the predicted peaks match the natural frequencies of the host structure. The very small shift of the peaks from the natural frequencies caused by the interaction between the host structure and the PZT patch indicates that the small size PZT patch can be permanently bonded to the structure for on-line health monitoring without changing the mechanical properties of the structure too much. It is concluded that the proposed impedance-based model for general structure-PZT interacting systems can be potentially used in structural health monitoring.