光纤光栅传感系统在结构损伤识别中的应用
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摘要
简述了光纤光栅传感器的传感原理,说明它具有良好的传感性能.为了表明光纤光栅传感能够用于结构的损伤识别,制作了带孔的悬臂梁结构,用盖板封住或去掉来模拟结构的完好和损伤,在结构开孔处和参考点处分别粘贴光纤光栅传感器测量结构的应变模态,通过结构应变模态在损伤前后的变化识别结构的损伤.试验结果表明,光纤光栅传感器具有很高的测量精度,能很好地识别结构的损伤.
The sensing principle of optic fiber bragg grating(FBG) sensor is briefly introduced and its satisfied sensing performance is illustrated in the paper.In order to indicate FBG sensors could be used to structural damage detection,the cantilever structure with the holes was designed.Four holes were opened in proper sequence from the bottom.The undamaged structure was simulated by covering the holes covered with plates,while,the plates were removed to mean the damaged structure.By covering different holes,the single damage and multiple damages could be demonstrated.In order to measure the structural strain modal,the FBG sensors were all installed beside the four holes and one reference point of cantilever structure,respectively.The experimental result showed that FBG sensors had high measurement precision level and the better damage diagnosis result could be achieved by using measurement information with FBG sensors.
The sensing principle of optic fiber bragg grating(FBG) sensor is briefly introduced and its satisfied sensing performance is illustrated in the paper.In order to indicate FBG sensors could be used to structural damage detection,the cantilever structure with the holes was designed.Four holes were opened in proper sequence from the bottom.The undamaged structure was simulated by covering the holes covered with plates,while,the plates were removed to mean the damaged structure.By covering different holes,the single damage and multiple damages could be demonstrated.In order to measure the structural strain modal,the FBG sensors were all installed beside the four holes and one reference point of cantilever structure,respectively.The experimental result showed that FBG sensors had high measurement precision level and the better damage diagnosis result could be achieved by using measurement information with FBG sensors.
引文
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[15]王柏生.结构损伤检测与识别技术[M].杭州:浙江大学出版社,2000:45-47Wang Baisheng.Structural damage detection and identification technique[M].Hang Zhou:Zhejiang University Press,2000:45-47
[2]Friebele E J,Askins C G,Kersey A B,et al.Optical fiber sensors for spacecraft applications[J].Smart Materials andStructures,2000,4:55-60
[3]Kersey A D,Davis MA,Patrick HJ,et al.Fiber grating sensors[J].Journal of Lightwave Technology,1997,15(8):1442-1463
[4]耿淑伟,余有龙.光纤光栅时分复用传感系统[J].哈尔滨工业大学学报,2002,34(2):204-206Geng Shuwei,Yu Youlong.Fiber bragg grating sensor system using time-division multiplexing technique[J].Journal ofHarbin Institute of Technology,2002,34(2):204-206
[5]李向舜.分布式光纤光栅传感器波长检测新技术简述[J].传感器世界,2003,11(5):1-5Li Xiangshun.Research of newtechnologies of distributed fiber bragg grating sensor[J].Senor World,2003,11(5):1-5
[6]李俊,吴瑾.钢筋锈蚀的光纤光栅监测[J].南京航空航天大学学报,2008,40(3):395-398Li Jun,Wu Jin.Optical fiber grating monitoring for reinforcement corrosion[J].Journal of Nanjing University ofAeronautics&Astronautics,2008,40(3):395-398
[7]Li HN,Li D S,Song G B.Recent application of fiber optic sensors to health monitoring in civil engineering[J].Engineering Structures,2004,26(11):1647-1657
[8]张金涛,刘士奎.FBG传感网络在结构健康监测领域的应用[J].激光与光电子学进展,2005,42(6):56-58Zhang Jintao,Liu Shikui.Fiber bragg grating sensor network and its applications in structure health monitoring[J].Laser&Optronics Progress,2005,42(6):56-58
[9]Tennyson R C,Mufti A A.Structural health monitoring of innovative bridges in Canada with fiber optic sensors[J].Smart Materials and Structures,2001,10:560-273
[10]Vofra S T.Quasi-static strain monitoring during the‘push’phase of a box-girder bridge using fiber bragg grating sensors[J].European Workshop on Optic Fiber Sensors.Pebbles Hydro,Scotland,1998,7:1-4
[11]欧进萍,周智,武湛君,等.黑龙江呼兰河大桥的光纤光栅智能监测技术[J].土木工程学报,2004,37(1):45-49Ou Jinping,Zhou Zhi,Wu Zhanjun,et al.Intelligent monitoring of Heilongjiang hulan river bridge based on FBGs[J].China Civil Engineering Journal,2004,37(1):45-49
[12]李宏男,李东升.土木工程结构安全性评估!健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90Li Hongnan,Li Dongsheng.Safety assessment,health monitoring and damage diagnosis for structures in civil engineering[J].Earthquake Engineering and Engineering Vibration,2002,22(3):82-90
[13]何涛,赵鸣,谢强,等.光纤光栅传感器用于盾构隧道施工的监测[J].地下空间与工程学报,2008,4(1):157-161He Tao,Zhao Ming,Xie Qiang,et al.Application of the fiber bragg grating sensors in the monitoring of the shield tunnelconstruction[J].Chinese Journal of Underground Space and Engineering,2008,4(1):157-161
[14]杨大智.智能材料与智能系统[M].天津:天津大学出版社,2000:76-81Yang Dazhi.Intelligent materials and system[M].Tianjin:Tianjin University Press,2000:76-81
[15]王柏生.结构损伤检测与识别技术[M].杭州:浙江大学出版社,2000:45-47Wang Baisheng.Structural damage detection and identification technique[M].Hang Zhou:Zhejiang University Press,2000:45-47
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