应急抛锚状态下拖锚对海管的撞击损伤-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Study on the Collision Damage of Submarine Pipelines by Towing Anchor Under Emergency Anchorage

作者:: 孙倩1; 周宏2; 周沛林2; （1．集美大学轮机工程学院，福建厦门 361021；2．江苏科技大学船舶与海洋工程学院，江苏镇江 212003）

Author(s):: SUN Qian1; ZHOU Hong2; ZHOU Peilin2; (1.School of Marine Engineering ,Jimei University,Xiamen 361021,China;2.Naval Architecture and Ocean Engineering Institute,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

摘要:: 为了分析拖锚对海底管道的撞击损伤情况，运用ABAQUS软件，对应急抛锚情况下拖锚与海底管道进行建模。选取最危险的锚尖与管道正撞情况进行了数值模拟，根据碰撞后管壁的凹痕深度与管道外径的比值，对海底管道进行安全校核；同时选取了不同管壁厚度和管道长度进行了计算比较，得出了拖锚撞击损伤程度随海底管道的壁厚和管道长细比的增加而减小。最后将DNV规范计算结果与有限元数值模拟结果进行对比，发现规范计算值明显偏大。研究成果对分析海底管道受拖锚撞击损伤的变形规律、海底管道的设计及修复具有一定的实用意义。

Abstract:: In this article finite element modeling of anchor and submarine pipeline under the condition of emergency anchorage was built up by using ABAQUS software,the positive collision between anchor tip and the pipeline was then selected as the most dangerous situation for numerical simulation. Security of the pipeline was checked as per the ratio of the dent depth to pipe wall diameter,and the relationships between towing anchor collision damage and pipe wall thickness as well as pipeline slenderness ratio were determined by horizontal comparison.It suggests that the damage degree of the towing anchor decrease in thickness and slenderness of the submarine pipelines.Finally,results from DNV classification rules were compared with the numerical simulation data,which reveals the significant difference between them.The research results have some practical significance for the analysis of deformation regularity of the submarine pipelines damaged by the towing anchor,the design and repair of the pipelines.