压电阻抗技术在结构健康监测中的应用研究.PDFVIP

第30卷第6期 结　 构　 工　 程　 师 Vol.30,No.6 2014年12月 Structural Engineers Dec. 2014 压电阻抗技术在结构健康监测中的应用研究 1 1,∗ 1,2 宋琛琛 　 谢丽宇 　 薛松涛 (1. 同济大学结构工程与防灾研究所,上海200092;2. 日本东北工业大学工学部建筑学科,仙台) 摘　 要　 压电阻抗原理在土木工程结构健康监测中的应用得到越来越多的关注。 系统阐述了压电材 料、压电阻抗原理、压电材料与被监测结构的相互作用模型,以及基于阻抗信息的监测技术,归纳了压电 阻抗技术应用中压电材料尺寸选择、扫描频率选择、感应范围、粘结剂影响、数据采集设备的发展、数据 处理方法等方面的研究成果,并对目前存在的问题进行了总结和分析。 关键词　 阻抗分析,压电材料,结构健康监测,损伤识别 Review of Piezoelectric Impedance-based Structural Health Monitoring 1 1,∗ 1,2 SONG Chenchen 　 XIE Liyu 　 XUE Songtao (1. Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai200092,China; 2. Department of Architecture,Tohoku Institute of Technology,Sendai,Japan) Abstract　 The application of piezoelectric impedance-based structural health monitoring technology has re- ceived more and more attention. This paper summarizes theoretical and experimental problems of impedance- based structural health monitoring based on piezoelectric materials. The characteristicsof piezoelectric materi- als,the principle of piezoelectric impedance,the interaction model between the piezoelectric transducer and thehost structureandtheconcept of impedance-basedmonitoring areillustrated. Thecurrent achievement and difficult issuesof impedance-basedmonitoringtechnology arereviewed,includingsizeselectionofpiezoelectric patches,scanningfrequency,sensingrange,adhesiveeffect,dataacquisitionequipmentandsignalprocessing methods,etc. Keywords　 impedance analysis,piezoelectric materials,structural health monitoring,damage identification 何结构都可以看作是由刚度、质量、阻尼矩阵组成 1　 引　 言 的力学系统,结构一旦出现损伤,结构参数也随之