摘要
以某型飞机机翼盒段为研究对象,建立了盒段试件的有限元模型,分析外载荷和应变分布之间关系。采用波分复用形式构建了分布式光纤Bragg光栅传感网络测量盒段试件的应变,设计了网络中光纤传感器的排布方式,在此基础上研究了传感网络的温度补偿方法。运用波长监测方法对盒段结构承受的不同载荷进行了实验研究。结果表明,传感器的波长偏移与载荷成线性关系,斜率由于加载点位置的变化而不同。传感器的最大载荷监测灵敏度达3.09 pm/N。
To analyze the relationship between the strain distribution and the load, a finite element model is built to simulate strain fields of a wing box. Distributed fiber Bragg grating （FBG） sensor network by adopting wavelength division multiplexing is used to measure the strain fields of wing box speciment. The arrangement of optical fiber sensors is designed and the temperature compensation of the sensor net-work is researched. By inspecting the wavelength, the load distribution of the wing box speciment is experimently studied. The result reveals that the wavelength shaft of FBG sensors with load is linear, but the slope changes with different load locations. The biggest load inspection sensitivity of FBG sensor is 3.09 pm/N.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2009年第2期217-221,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(60477031)资助项目
国家自然科学基金重点(60535020)资助项目
江苏省汽车工程重点实验室开放基金(QC200502)资助项目
关键词
光纤BRAGG光栅传感器
载荷监测
波分复用
波长偏移
盒段
fiber Bragg grating sensor
load measurement
wavelength division multiplexing
wave-length shaft
wing box
