FBG式隔水管应变传感器的力学响应特性分析  

Analyzing Mechanic Response of FBG Strain Sensor for Under-water Riser

作　　者：徐健[1,2] 杨德兴[1,2] 姜亚军[1,2] 秦川[1,2] 王骏[1,2] 杨楠[1,2] 张建安 

机构地区：[1]西北工业大学理学院陕西省光信息技术重点实验室,西安710072 [2]空间应用物理与化学教育部重点实验室,西安710072 [3]解放军边防学院,西安710108

出　　处：《机械科学与技术》2013年第11期1693-1698,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家科技重大专项课题(2011ZX05026-001-06);西北工业大学创新基金项目(2012KJ01005)资助

摘　　要：针对深海隔水管应力监测所设计的光纤布拉格光栅(FBG)应变传感器系统,采用基于有限元方法的软件对传感器在不同载荷模式下的力学响应特性进行了分析,得到了该传感器的应变传递系数。并以仿真结果为依据,对隔水管所受最大应力和弯矩的公式进行了修正。为了获得合适的传感器应变传递系数,通过改变相应参数建立计算了不同的仿真模型,由此分析了弹性元件和固定钢管的弹性模量、长度和外径对它的影响。结果表明:弹性元件长度为调节传感器应变传递系数的最佳参数。According to the FBG（fiber Bragg grating）strain sensor designed to monitor the stress of an underwater riser, the sensor＇s strain transfer coefficient is obtained after the mechanical response of the sensor under various loads is analyzed with the FEM-based software. Calculation formulas of maximum stress and bending moment are a- mended on the basis of simulation results. In order to obtain the suitable strain transfer coefficient of the sensor, different simulation models are established and calculated by changing ulus, external diameter and the length of elastic element of the sensor efficient are analyzed. It is shown that the length of elastic elemen sensor＇s strain transfer coefficient. its parameters. The influence of elastic rood- and the fixed steel pipe on strain transfer co- t is the optimal parameter for adjusting the

关 键 词：应变传感器 应变传递系数 有限元方法 光纤布拉格光栅 隔水管 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]