压电纤维复合材料的管道结构健康监测应用  

Pipeline structural health monitoring application of piezoelectric fiber composite

作　　者：王露 刘盛文 谢文韬 汤林 袁晰[2] 周科朝[1] 张斗[1] WANG Lu;LIU Sheng-wen;XIE Wen-tao;TANG Lin;YUAN Xi;ZHOU Ke-chao;ZHANG Dou(State Key Laboratory of Powder Metallurgy,Institute of Powder Metallurgy,Central South University,Changsha 410083,China;School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学粉末冶金研究院,粉末冶金国家重点实验室,长沙410083 [2]中南大学化学化工学院,长沙410083

出　　处：《中国有色金属学报》2023年第4期1085-1095,共11页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2021YFB2012100);国家自然科学基金资助项目(52172134,U19A2087,52102150)。

摘　　要：管道实时结构健康监测对工程应用具有重要意义,压电纤维复合材料在与管道结构共形时保持压电阻抗特性,对管道结构进行健康监测。本文制备了压电纤维复合材料,研究了复合材料厚度对电阻抗特性的影响,厚度大于250μm时阻抗峰值下降50%。基于压电纤维复合材料进行了结构载荷监测应用验证,通过相关系数偏差值(R_(C))和均方根偏差(R_(M))方法对结构受到损伤时的压电纤维复合材料阻抗敏感特征进行量化,并基于无损状态建立了损伤阈值(U_(l))。当管道结构受到50 N载荷时,R_(C)指数达到0.51(U_(l)=0.005);螺栓结构松动50%时,R_M指数达到7.96(U_(l)=0.63)。结果表明,压电纤维复合材料可以对管道结构应力状态变化和螺栓松动进行灵敏响应,适用于管道等复杂曲面结构进行结构健康监测,应用前景广阔。Real-time structural health monitoring of pipeline is critical for engineering applications.Piezoelectric fiber composites can conform to the curved structure of pipes while maintaining the piezoelectric impedance characteristics,which attract much interest in the fields of pipeline structural health monitoring.In this work,piezoelectric fiber composites were manufactured,the effect of composites thickness on electrical impedance characteristics was studied,and the peak impedance decreased by 50%when the thickness was higher 250μm.Structure monitoring application verification was carried out based on the composites.The impedance sensitive features of piezoelectric fiber composites under structural damage condition were quantified by correlation coefficient deviation(R_(C))and root-mean-square deviation(R_(M)),creating a upper control limit(U_(l))based on intact condition.R_(C) index reached 0.51(U_(l)=0.005)and R_(M) index reached 7.96(U_(l)=0.63)while pipe structure loaded 50 N and bolt loosened 50%,respectively.The results show that piezoelectric fiber composites are suitable for structural health monitoring of complex curved structures such as pipes due to sensitive response to changes of pipe structure stress condition and bolt loosening,and have broad application prospects.

关 键 词：压电纤维复合材料 柔性 压电阻抗 结构健康监测 

分 类 号：TB321[一般工业技术—材料科学与工程]