光纤复合海底电缆应变测量的数学建模与仿真  

Mathematical modeling for and simulation of optical fiber composite submarine cable strain measurement

作　　者：吕安强[1] 陈永[1] 尹成群[1] 李永倩[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《光通信研究》2014年第5期33-36,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(51407074;61377088);中央高校基本科研业务费专项资金资助项目(13MS62);河北省自然科学基金资助项目(E2012502045)

摘　　要：为了获得光纤复合海底电缆的应变与光单元应变的关系,以便用分布式光纤传感技术准确测量海底电缆本体的应变分布。在分析海缆结构的基础上,进行了海缆与光单元应变关系的数学建模和仿真。通过合理简化海缆结构,建立了海缆的有限元模型,进行了直线拉伸数值计算,对比了数值计算结果和数学模型。结果表明,数值计算结果与数学模型一致,光单元应变与海缆应变满足线性关系,且小于海缆应变值,可以利用光单元应变推算海缆的应变,这为基于分布式光纤应变测量的海缆状态监测提供了理论依据。In order to identify the relationship between fiber unit strain and fiber composite submarine cable strain so as to accurately measure the submarine cable strain distribution by using the distributed optical fiber sensing technology, this paper con- ducts mathematical modeling for and simulation of the said relationship. It first establishes the mathematical model on the basis of analyzing the submarine cable structure and the finite element model by rationally simplifying the submarine cable structure. Then it conducts the linear stretching numerical calculation and compares the calculation results and mathematical model. The results show that the they are in agreement, in other work, the fiber unit strain is linear with the submarine cable strain and smaller than the latter, which means we can use fiber unit strain to calculate the submarine cable strain and provide a theoretical basis for monitoring the state of submarine cables on the basis of distributed optical fiber strain measurements.

关 键 词：光纤复合海底电缆 数学建模 绞合结构 有限元仿真 

分 类 号：TN818[电子电信—信息与通信工程]