基于光纤传感的系统损伤识别的实验研究

摘要

光纤光栅传感器在工程结构健康监测中具有广泛的应用.基于光纤传感的系统参数识别方法,搭建铝梁结构的光纤传感测量系统,通过测量铝梁结构系统的模态参数并对参数进行分析,来判断铝梁结构是否发生损伤;在此基础上,通过分析光纤光栅传感器测量所得的大量数据,对铝梁结构系统的损伤进行定位.实验研究结果表明该方法能够较好地监测结构损伤并对损伤进行定位,很大程度上减少结构系统的安全隐患,在现代工程应用中具有重要的意义.%Fiber Bragg grating sensors have great applications in structure health monitoring. The method was based on the system parameter identification of fiber optic sensing to build the optical fiber sensing measurement system of aluminum beam structure,by measuring the modal parameters of the structural system and analyzing parameters to determine whether the damages of the aluminum beam structure have happened;the damages of the aluminum beam structure were also located by analyzing the data measured by the FBG sensors. Experimental results show that this approach can better monitor and locate the damages of structural system,which greatly reduces the security risks of structural system,and has important significance in engineering applications.