三芯光纤复合海缆拉伸的有限元建模与仿真

摘要

Three-core optical fiber composite submarine power cable is often stretched in the process of transportation,installa-tion and operation.The stress and strain data can be obtained by the simulation of stretching modeling,which is difficult to be obtained in the entity experiment.In this paper,the finite element model of the submarine cable is established,which is used to simulate the stretching process.We first simplify the structure of the submarine power cable according to the mechanical characteristics of stretching.The constraint,speed loads and hourglass control are then imposed to simulate the axial stretching process.Finally,the stress and strain data of the finite element model is extracted and processed to obtain the stress and strain of the submarine cable.The results provide reference for the study of mechanical properties and operating condition j udgement of the submarine power cable.%三芯光纤复合海底电缆(简称为“海缆”)在运输、敷设和运行的过程中经常会产生拉伸的机械行为，对其进行拉伸建模仿真，可获得实体试验难以得到的应力、应变等数据。文章通过建立海缆拉伸有限元模型，模拟了海缆的拉伸过程。首先根据海缆拉伸的力学特点对结构进行简化，得到三芯海缆的几何模型；然后对其施加约束及速度载荷，控制沙漏能，仿真轴向拉伸过程；最后对数据进行有效提取和处理，获得海缆的应力与应变，为研究海缆的力学性能、判断海缆工作状态提供了参考。