BK21Plus Team, Department of Ocean Engineering, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Korea.
Smart Infrastructure Technology Institute, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Korea.
Sensors (Basel). 2019 Mar 19;19(6):1377. doi: 10.3390/s19061377.
For impedance-based damage detection practices, the sensing range of piezoelectric devices is an important parameter that should be determined before real implementations. This study presents numerical and experimental analyses for characterizing the sensing region of a smart PZT (lead⁻zirconate⁻titanate) interface for damage monitoring in plate-like structures. First, a finite element (FE) model of the PZT interface mounted on a plate structure is established. The impedance responses of the PZT interface are numerically simulated under different damage locations inflicted in the plate domain. The impedance features are extracted from the impedance signatures to analyze the sensing distance and the damage detectability of the PZT interface. Next, the splice plate of a bolted connection is selected as a practical plate-like structure for the experimental examination of the PZT interface's sensing region on a limited plate domain. The damage sensitivity behavior of the PZT interface is analyzed with respect to the damage location on the splice plate. An FE analysis of the corresponding PZT interface-splice plate system is also conducted to support the experimental results.
对于基于阻抗的损伤检测实践，压电设备的传感范围是在实际实施之前应确定的重要参数。本研究针对用于板状结构损伤监测的智能 PZT（铅-锆-钛酸盐）界面的传感区域进行了数值和实验分析。首先，建立了安装在板结构上的 PZT 界面的有限元（FE）模型。在板域中施加不同的损伤位置下，对 PZT 界面的阻抗响应进行了数值模拟。从阻抗特征中提取阻抗特征，以分析 PZT 界面的传感距离和损伤可检测性。接下来，选择螺栓连接的拼接板作为实际的板状结构，用于在有限的板域上对 PZT 界面的传感区域进行实验检查。根据拼接板上的损伤位置分析了 PZT 界面的损伤灵敏度行为。还对相应的 PZT 界面-拼接板系统进行了有限元分析，以支持实验结果。
