基于准分布式FBG阵列的大型机械结构应变监测研究

发布时间：2018-07-02 07:07

本文选题：光纤布拉格光栅 + 准分布式　；参考：《工具技术》2017年06期

【摘要】：针对机械加工制造中大型机械结构部位、尤其是壁板类零件在工况中受强过载容易造成结构强度失效等问题,采用准分布式光纤布拉格光栅(FBG)阵列对常见板状结构局部应变进行准分布式监测研究。在对应变传感器理论分析的基础上,结合波分复用技术,在一根光纤上接入9支FBG构成传感阵列,使其分布在板状结构表面。通过有限元理论分析与局部加载试验验证,证明了准分布式FBG传感阵列对大型机械结构进行应变监测的可行性。研究结果为结构健康监测提供了一种可靠的应变监测方法,为进一步研究准分布式FBG阵列的位置布局提供了有利的试验依据。
[Abstract]:In order to solve the problem of structural strength failure caused by overloading of large mechanical structure parts, especially the wall plate parts in the working conditions, such as mechanical machining and manufacturing, it is easy to cause structural strength failure, and so on. The quasi-distributed fiber Bragg grating (FBG) array is used to study the local strain monitoring of common plate structures. Based on the theoretical analysis of strain sensors and combining with wavelength division multiplexing (WDM) technology, nine FBG sensors are connected to a single fiber to form a sensor array, which is distributed on the surface of a plate-like structure. The feasibility of the quasi-distributed FBG sensor array for strain monitoring of large mechanical structures is proved by finite element theory analysis and local loading test. The results provide a reliable strain monitoring method for structural health monitoring and a favorable experimental basis for further study on the location of quasi-distributed FBG arrays.
【作者单位】：北京信息科技大学光电信息与仪器北京市工程研究中心;光电测试技术北京市重点实验室;生物医学检测技术及仪器北京实验室;
【基金】：国家自然科学基金(51675053) 教育部“长江学者和创新团队”发展计划(IRT1212) 北京市重大科技计划项目(Z151100003615010)
【分类号】：TH17;TP212

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