嵌入SRM复合材料壳体结构涂层中的FBG传感器应变传递规律  

Strain transfer of FBG sensor embedded between composite shell and protective coating of a certain type of SRM

作　　者：常新龙[1] 刘文韬[1] 张有宏[1] 杨帆[1] 张晓军[1] 

机构地区：[1]第二炮兵工程大学,西安710025

出　　处：《固体火箭技术》2016年第3期412-416,共5页Journal of Solid Rocket Technology

摘　　要：文章针对光纤传感器粘贴嵌入复合材料壳体表面和涂层之间的特殊结构,研究了光纤传感器的应变传递规律。首先,利用多层面结构的应力平衡推导了应变传递函数;其次,利用有限元方法对传递函数进行了验证,数值解与应变函数理论解的计算误差能够控制在5%以内;最后,分析了涂层对应变传递率的影响。结果表明,涂层弹性模量和厚度越大,应变传递率越低。A kind of special structure that FBG sensor is bonded between the composite shell surface and the protective coating was investigated in this paper,and a strain transfer function was established. Firstly, based on the stress balance between the multi- level structures, the strain transfer function was presented. Then a finite element method （FEM）was conducted to the validate func- tion, and the calculation error was controlled within 5%.Finally, the influence of elastic modulus and thickness of protective coating on the measured strain was analyzed.Results show that strain transfer rate descends notably when the elastic modulus and thickness of coating increase.

关 键 词：光纤布拉格光栅传感器 涂层 有限元分析 应变传递 

分 类 号：V435.22[航空宇航科学与技术—航空宇航推进理论与工程] TP212.9[自动化与计算机技术—检测技术与自动化装置]