海底电缆扭转损伤的参量化评价方法  

Parametric evaluation method for torsion damage of submarine cables

作　　者：吕安强[1,2] 李婷[1] LÜAnqiang;LI Ting(Department of Electronic and Communication Engineering,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Power Internet of Things Technology,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003 [2]华北电力大学河北省电力物联网技术重点实验室,河北保定071003

出　　处：《绝缘材料》2023年第11期110-116,共7页Insulating Materials

基　　金：国家自然科学基金资助项目(52177141)。

摘　　要：海底电缆在运输、敷设过程中,不可避免地会发生扭转,若扭转角度过大,会对其造成不可恢复的损伤。本文利用有限元方法建立了海底电缆的扭转模型,通过分析应力、应变的时空分布特点,确定了能够有效反映海缆力学特性的特征参量,制定了扭转故障发生时各特征参量的阈值,建立了能够表征海底电缆扭转行为的力学参量体系。结果表明:海缆发生扭转初期,其轴向各结构应力分布较为均匀;随着扭转角度的增加,缆体轴向应力分布会出现波动,可建立包括铜导体应力、XLPE绝缘层应力、铅合金护套应力、铠装层应力和扭转角度的参量体系,对海缆扭转行为进行参量化评价。In the process of transportation and laying,the submarine cable will inevitably be twisted.If the twisting angle is too large,it will cause irreparable damage for the submarine cable.In this paper,a torsion model of submarine cable was established by finite element method,and the characteristic parameters that can effectively reflect the mechanical characteristics of submarine cable were determined by analyzing the temporal and spatial distribution characteristics of stress and strain.The threshold values of each characteristic parameter when torsion failure occured were established,and the mechanical parameter system that can represent the torsion behavior of submarine cable was established.The results show that the axial stress distribution of the submarine cable is more uniform at the initial stage of torsion.With the increase of torsion angle,the axial stress distribution of cable body will fluctuate.A parametric system including copper conductor stress,XLPE insulating layer stress,lead alloy stress,armor layer stress,and torsion angle can be established for parametric evaluation of submarine cable torsion behavior.

关 键 词：海底电缆 扭转损伤 参量体系 评价方法 有限元 

分 类 号：TM247[一般工业技术—材料科学与工程]