三芯光纤复合海底电缆超负荷运行有限元建模

Finite Element Modeling of the Three-Core Fiber Composite Cable Overload Operation

为了获取三芯光纤复合海底电缆超负荷运行时的温度变化情况,分别建立了三芯海缆陆地段与海底段的有限元模型。通过ANSYSY软件稳态仿真验证了所建模型进行超负荷运行的可行性。将120%、140%、160%、180%和200%的载流量分别施加到陆地段和海底段海缆模型上,陆地段比海底段先达到海缆最高工作温度90℃,并给出了不同负荷运行情况下的应急时间。超负荷值较低时,海底段海缆应急时间大于陆地段应急时间,且应急时间随超负荷值的增大逐渐逼近。该结论为利用光纤传感监测海缆过负荷运行提供了参考。

In order to obtain the temperature change of the three-core fiber composite submarine cable overload operation condi- tion, the finite element of three-core cable section and the section of the land sea model are established respectively. The feasi-- bility of the model is verified by ANSYSY simulation. 120%, 140%, 160%, 180% and 200% of the carrying capacity are ap- plied to the land and submarine cable model. It shows that the land cable model first reaches the highest ratio of submarine cable temperature 90℃. We also provide the emergency time in different load conditions. When the three-core cable overload in the lower case, the emergency time period in the submarine is longer than that in the landing area. The emergency time differ- ence becomes smaller with the increase of load value. Our investigation provides a reference value for overload operation by the optical fiber sensing monitoring cable.