基于应变极值坐标的板状结构静载辨识研究  

Research on Static Load Monitoring Based on Extreme Strain Value Coordinates Identification

作　　者：穆昊[1] 曾捷[1] 梁大开[1] 周雅斌[1] 孙晓明[1] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,江苏南京210016

出　　处：《压电与声光》2014年第1期113-119,123,共8页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(60907038;51275239);航空科学基金资助项目(20125652055)

摘　　要：针对航空典型板状结构静载监测的需求,选取铝合金板与碳纤维复合材料板为对象,提出了一种基于约束边应变极值坐标辨识原理的静载判位方法。根据此原理,分别构建了基于光纤布喇格光栅传感网络与电阻应变片阵列的静态载荷判位监测系统,并给出了传感器沿板结构约束边线性布局的优化配置规则。研究表明,该判位方法对铝合金板与碳纤维复合材料板具有较好适用性,且静载判位结果不受板结构参数变化影响。实验结果显示,该方法在1 200mm×1 200mm铝合金板上的静载判位误差小于20mm,而在540mm×540mm碳纤维板上的静载判位误差小于11mm。数值仿真与实验结果相吻合。Targeting the demands of structure health monitoring in aviation field,the static load identification method of static load was proposed based on the location of extreme stain value at the constraint edge.Aluminum alloy plate and carbon fiber plate were selected as the aviation typical materials.Moreover,static load identification and monitoring system based on fiber Bragg grating sensor network and resistance strain gauge array was built up respectively.The result demonstrated good applicability to isotropic material and orthotropic material,and showed same results upon structure parameters change.Experimental results showed the error was less than 20 mm at the 1 200 mm × 1 200 mm aluminum alloy plate and the error was less than 11 mm at the 540 mm × 540 mm carbonfiber plate.This method was reasonable in the practical static load identification.

关 键 词：航空板状结构 静载监测 应变极值坐标 优化布局 光纤布喇格光栅 

分 类 号：TM253[一般工业技术—材料科学与工程] V19[电气工程—电工理论与新技术]