海底光电复合缆的落锚撞击试验与仿真研究
Field Test and Numerical Modeling of Submarine Photoelectric Composite Cable under Anchor Impact
刘晓霞 1高强 2脱浩虎 3任晖邦 3徐健 3张涛4
作者信息
- 1. 中海油研究总院
- 2. 复旦大学
- 3. 中国石油大学(北京)海洋工程研究院
- 4. 青岛汉缆股份有限公司
- 折叠
摘要
为了解决船锚损害海底电缆的问题,选取海底光电复合缆和不同质量的船锚,设计了一套落锚撞击海缆的试验装置.首先在潮间带的海滩砂土上进行现场撞击试验,得到不同冲击能量下海军锚撞击海缆的破坏规律;然后采用ABAQUS建立船锚-海缆-海床的冲击动力学有限元计算模型,得到了撞击过程中铠装层和光单元截面变形量的时程曲线,截面最终变形量与现场试验结果吻合.研究结果表明:船锚撞击复合缆时会产生撞击点局部凹陷和海底电缆的整体弯曲变形;局部凹陷对海底电缆造成了主要损伤,可根据铠装层的变形率来评估内部缆芯的损伤情况.研究方法和结果对研究海底光电复合缆的抗机械冲击性具有一定的指导意义和工程价值.
Abstract
To address the damage of submarine power cables by anchor,a submarine photoelectric composite cable and anchors different mass were chosen to design a set of submarine photoelectric composite cable impact test system.Firstly,the field impact test was carried out on the sandy beach of a tidal zone to attain the damage law of the submarine power cable under different impact energy of navy archor.Then the ABAQUS was used to establish the finite element model of the impact dynamics of the ship anchor-submarine power cable-seabed.The time history curve of the cross section deformation of the armor layer and the optical unit was obtained.The final deformation of the cross section deformation was in agreement with the field test result.The results of field test and finite element simulation show that the composite cable will produce compound deformation of local indentation and overall bending deflection by the impact of anchor.The local indentation is the critical reason of cable fault.The structural damage of internal power and optical units can be evaluated intuitively by the armor layer indentation.The study results could provide valuable theoretical and engineering value for studying the mechanical impact resistance of submarine optical composite cable.
关键词
海底光电复合缆/船锚/撞击试验/结构损伤/有限元分析Key words
submarine photoelectric composite cable/anchor/impact test/structural damage/finite element analysis引用本文复制引用
出版年
2017
NETL
NSTL
维普
万方数据