[1]李 鹏,王博士,郭 健,等.基于有限元仿真的三芯光纤复合海缆扭转研究[J].郑州大学学报(工学版),2022,43(04):67-73.
 Torsional Research of Three-core Fiber Composite Submarine Cable Based on Finite Element Simulation[J].Journal of Zhengzhou University (Engineering Science),2022,43(04):67-73.
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基于有限元仿真的三芯光纤复合海缆扭转研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年04期
页码:
67-73
栏目:
出版日期:
2022-07-03

文章信息/Info

Title:
Torsional Research of Three-core Fiber Composite Submarine Cable Based on Finite Element Simulation
作者:
李 鹏1 王博士2 郭 健1 苏 凯2
文献标志码:
A
摘要:
为探究三芯光纤复合海底电缆扭转过程中主要结构的力学特性,以 220 kV 三芯光纤复合海底电缆为研究对象,基于有限元软件 ABAQUS,建立了海缆局部段的精细数值分析模型。 在保证力学结构真实性的前提下对海缆计算模型进行简化,并在结构接触部位设置面-面接触控制,模拟海缆最外层结 构受外力驱动发生扭转时各层接触部位发生的相对运动。 通过开展相关数值仿真实验,重点研究海缆扭转过程中各材料发生屈服的先后顺序以及扭转角度对海缆铠装钢丝层、铜导体、光单元的受力影响。结果表明,在海缆扭转过程中,应力的轴向扩散导致同一断面处铠装钢丝层、铜导体、光单元的应力呈现 出先增大后减小的趋势;相对材料自身屈服强度而言,轴向上两端部应力较低,远离固定端约 0. 2 ~ 0. 5 倍约束距离处应力较大;沿轴向方向各结构扭转角度具有较好的同步性,并呈现出线性变化趋势;随着 扭转角度的增大,铠装钢丝层和光单元在靠近端部约 0. 1 倍约束距离处出现应力集中,铜导体应力沿轴向方向保持较高的水平;扭转过程中,在同一断面位置的铜导体、铠装钢丝层、光单元先后发生屈服,结构安全度表现出典型的非同步性特征。
Abstract:
In order to explore the mechanical properties of the main structures of the three-core fiber composite submarine cable during torsion, 220 kV three-core fiber composite submarine cable was taken as the sample. Based on the finite element software ABAQUS, a 3D numerical simulation model of 220 kV three-core fiber composite submarine cable was established. On the premise of guaranteeing the authenticity of mechanical structure, the calculation model was simplified and the surface-surface contact control was set up to simulate the relative motion of each layer when the outermost structure was torsionally driven by external force. The yield sequence and effect of torsion angle on stress of the steel armor, copper conductor and optical fiber were mainly studied by numerical simulation experiments. The results showed that the stress of the steel armor, cop- per conductor and optical fiber at the same section increased initially and then decreased due to the axial stress diffusion, while the stress at both ends was lower, and greater compared to the yield stress of the material itself at 0. 2 -0. 5 times model length away from the fixed end during the torsion of the cable. The torsion angle along the axial direction had a good synchronicity and a linear downtrend. With the increase of torsion angle, the stress concentration appeared at 0. 1 times model length away from the both ends of the steel armor and the op- tical fiber, and the copper conductor kept a higher level along the axial direction. During the torsion process, copper conductor, the steel armor and optical fiber yielded successively, and the safety margin had obvious non-synchronicity.
更新日期/Last Update: 2022-07-03