CAJ | 학술논문

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。
위료획득광섬복합해저전람적응변여광단원응변적관계，이편용분포식광섬전감기술준학측량해저전람본체적응변분포。재분석해람결구적기출상，진행료해람여광단원응변관계적수학건모화방진。통과합리간화해람결구，건립료해람적유한원모형，진행료직선랍신수치계산，대비료수치계산결과화수학모형。결과표명，수치계산결과여수학모형일치，광단원응변여해람응변만족선성관계，차소우해람응변치，가이이용광단원응변추산해람적응변，저위기우분포식광섬응변측량적해람상태감측제공료이론의거。
In order to identify the relationship between fiber unit strain and fiber composite submarine cable strain so as to accu-rately 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 theoreti-cal basis for monitoring the state of submarine cables on the basis of distributed optical fiber strain measurements.