基于含金属芯压电纤维与Lamb波的一维结构损伤定位研究  

Damage Localization Based on metal-core piezoelectric ceramic fiber and Lamb wave

作　　者：刘建[1] 裘进浩[1] 常伟杰[1] 季宏丽[1] 朱孔军[1] 

机构地区：[1]南京航空航天大学智能材料与结构航空科技重点实验室,南京210016

出　　处：《振动与冲击》2011年第4期16-20,共5页Journal of Vibration and Shock

基　　金：国家"863"高技术计划(2007AA03Z104);国家自然科学基金重点项目(50830201);教育部长江学者创新团队项目(IRT0906)

摘　　要：含金属芯压电纤维(Metal-core Piezoelectric Ceramic Fiber,MPF)是一种新型压电功能器件。介绍了MPF的结构及其对圆形压电片激励Lamb波的传感响应模型。利用Gabor小波变换计算损伤反射信号到达时间延迟的原理,把MPF传感单一模式Lamb波在一维结构中进行了损伤定位研究。研究结果表明:MPF可以进行Lamb波的单一模式传感,采用Gabor小波变换计算损伤反射信号到达时间延迟效果较好,损伤定位精度较高。Metal-core piezoelectric ceramic fiber（MPF） is a new type piezoelectric ceramic device.Its configuration and response to Lamb wave fields excited by a circular crested actuator were presented here.According to calculating time delays of damage signals with Gabor wavelet transformation,MPF sensing single-mode Lamb waves to be used in one-dimensional structural damage localization was investigated.Results showed that MPF can be used as a sensor for single mode Lamb wave;its performance of calculating time delays of damage signals with Gabor wavelet transformation is good;the damage localization accuracy is also high.

关 键 词：含金属芯压电纤维 LAMB波 单一模式 GABOR小波 结构健康监测 

分 类 号：TB553[理学—物理] TN384[理学—声学]