Test and Simulation Study on Impact Response of Submarine Optoelectronic Composite Cables
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摘要: 为探讨海底光电复合电缆（submarine optical-electrical composite cable，SOCC）在不同工况下的抗冲击力学性能，对SOCC开展落锤冲击试验，揭示不同变量下其外铠装的结构变形特征，记录冲击演化过程和最大凹陷变形程度；然后，对SOCC开展有限元模拟，并与试验结果进行对比分析；最后，探讨了SOCC在不同参数影响下的变形特征。结果表明：内外铠装均发生了凹陷变形，铜铠装、铜导体和光缆铠装主要表现为弯曲变形，同时耦合局部凹陷变形；随着冲击能量的增大，金属构件达到最大变形所需时间缩短、回弹加快；冲击角度对内外铠装凹陷变形的影响不明显，对内部其他构件产生了显著破坏，其中上方构件的变形破坏最为严重。研究结果有利于对SOCC的动力学性能评估，并为工程中SOCC保护措施设计提供参考。Abstract: This thesis aims to explore the impact resistance mechanical properties of submarine optical-electrical composite cable (SOCC) under different working conditions. Firstly, a hammer impact test was carried out on SOCC to reveal the structural deformation characteristics of the outer armour under different variables, and to record the impact evolution process and the maximum degree of concave deformation; secondly, a finite element simulation analysis was carried out on SOCC, and a comparison analysis was made with the test results; lastly, the deformation characteristics of SOCC under the influence of different parameters were explored. The results show that both the inner and outer armour undergoes depression deformation, while the copper armour, copper conductor and optical cable armour mainly show bending deformation, coupled with local depression deformation. With the increase of impact energy, the time required for metal components to reach the maximum deformation decreases, and the faster the rebound is; the impact angle does not have a significant effect on the depression deformation of the inner and outer armour, and produces significant damage to other internal components, of which the upper component has the most serious deformation damage. This paper is conducive to the evaluation of the dynamic performance of SOCC and provides a reference for the design of SOCC protection measures in engineering.
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图 12 A组条件下最大冲击力和装甲压痕的试验与数值模拟对比
Figure 12. Comparison of the maximum impact force and armor indentation of tests and FEM under group A
图 15 冲击力与外铠装的变形关系
Figure 15. Relationships between impact force and deformation of outer armor
图 16 不同冲击高度下铠装凹陷变形历程曲线
Figure 16. Deformation curves of the armor indentation at different heights
图 17 不同高度下内部构件弯曲曲线
Figure 17. Bending curves of internal components at different heights
图 18 不同高度下铠装截面的变形比率
Figure 18. Armor cross-section deformation ratio at different heights
图 21 冲击力与外铠装变形的关系
Figure 21. Relationships between impact force and outer armor deformation
图 22 不同冲击角度下铠装凹陷变形历程曲线
Figure 22. Curves of armor indentation time history at different impact angles
图 23 不同冲击角度下内部构件弯曲曲线
Figure 23. Bending deformation curves of internal components at different impact angles
图 26 不同冲击角度下铠装截面变形比率
Figure 26. Armor cross-section deformation ratio at different impact angles
表 1 SOCC尺寸参数
Table 1. Dimension parameters of SOCC
Position Component type Raw materials Quantity hn/mm douter/mm θ/(°) Optical cable Optical fiber Inner sheath Polyethylene 1.0 5.8 Armor Steel 2.0 9.8 10 External sheath Polyethylene 2.5 14.8 Power cable Copper conductors Copper 3 11.4 Water-blocking tape Semiconductor water-blocking tape 0.3 11.4 Conductor shielding Semiconductor compounds 0.8 13.0 XLPE insulation layer Crosslinked polyethylene 10.5 34.0 Insulated shielding Semiconductor compounds 1.0 36.0 Water-blocking tape Semiconductor water-blocking tape 0.3 36.9 Copper armor Copper 52 1.1 39.2 10 Copper belt Copper 0.1 39.5 Water-blocking tape Semiconductor water-blocking tape 0.3 40.4 Cableouter sheath Polyethylene 2.5 45.4 Inner layer Filler Polyethylene 97.9 Inner cover tape Nylon tape 0.3 98.8 Inner sheath Polyethylene 3.0 104.8 Double-layer armor Armor Steel 77/84 4.0 112.8/121.7 10 Adhesive tape Nylon tape 0.3 113.7/122.6 External sheath Polyethylene 5.0 132.6 
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表 2 重物尺寸
Table 2. Dimensions of weight
No. Photo Shape Mass/kg Dimension/(mm×mm) Material Hardness/MPa 1 
Cylinder 6.7 $ \mathrm{\varnothing } $100×150 Cr12MoV 4.71 2 
Semi-sphere 6.0 $ \mathrm{\varnothing } $100×150 Cr12MoV 4.71
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表 3 试验分组情况
Table 3. Test grouping situation
Group Weight shape Impact angle/(°) Mass/kg h/m A Semi-sphere 0 300 0.5 1.0 1.5 B Semi-sphere 45 300 0.5 1.0 1.5 C Cylinder 0 300 0.5 1.0 1.5 D Semi-sphere 0 50 3.0 100 3.0 150 3.0
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表 4 试验结果
Table 4. Test results
Group Weight shape Impact angle/(°) Mass/kg h/m Maximum deformation of
the outer armor/mmPeak force of
impact/kNA Semi-sphere 0 300 0.5 21.42 89.2 1.0 31.79 126.1 1.5 41.63 140.4 B Semi-sphere 45 300 0.5 20.03 92.7 1.0 28.67 128.3 1.5 37.21 159.8 C Cylinder 0 300 0.5 13.87 123.6 1.0 22.02 161.1 1.5 30.09 191.7 D Semi-sphere 0 50 3.0 19.21 92.8 100 3.0 29.99 124.5 150 3.0 38.33 145.8
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Material Density/(kg·m−3) Elastic modulus/GPa Poisson’s ratio Yield strength/MPa XLPE 930 0.3 0.30 20 PE 958 0.883 0.46 20 Cu 8960 108 0.33 305 Steel 7960 210 0.30 340
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表 6 冲击能量参数
Table 6. Impact energy parameters
Falling height/m Mass/kg Velocity/(m·s–1) Impact energy/kJ 0.25 300 2.213 0.735 0.50 300 3.130 1.470 0.75 300 3.830 2.205 1.00 300 4.427 2.940 1.25 300 4.949 3.675 1.50 300 5.422 4.410 1.75 300 5.856 5.145
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