Torsional Research of Three-core Fiber Composite Submarine Cable Based on Finite Element Simulation

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Torsional Research of Three-core Fiber Composite Submarine Cable Based on Finite Element Simulation

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[1]LI Peng,WANG Boshi,GUO Jian,et al.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.[doi:10.13705/j.issn.1671-6833.2022.04.007]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43卷 Number of periods: 2022 04 Page number: 67-73 Column: Public date: 2022-07-03

Title:: Torsional Research of Three-core Fiber Composite Submarine Cable Based on Finite Element Simulation

Author(s):: LI Peng¹; WANG Boshi²; GUO Jian¹; SU Kai²; 1.PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China;
2.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China

Keywords:: three-core fiber; torsional characteristics; finite element simulation; yield stress; safety margin

CLC:: TM247

DOI:: 10.13705/j.issn.1671-6833.2022.04.007

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,copper 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 optical 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.

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Last Update: 2022-07-03