基于Abaqus的梯形海床电缆铺设静态受力分析

Static Stress Analysis of Cable Laying on Trapezoidal Seabed Based on Abaqus

采用Abaqus数值模拟方法建立海底电缆-海床数值模型,分析地形曲率半径对海底电缆静态受力特性的影响规律。结果显示:梯形海床坡顶处电缆出现应力集中现象,在相同曲率半径下,坡顶处电缆应力远大于坡脚,即在相同曲率半径下,电缆在海岭处的应力大于海沟;当曲率半径增大时,坡顶处电缆应力显著减小,其他位置电缆受力无明显变化。研究成果可为海底电缆铺设施工提供理论支持。

Using the Abaqus numerical simulation method,the submarine cable-seabed numerical model is established,and the influence of the terrain curvature radius on the static stress characteristics of the submarine cable is analyzed.The results show that:the stress concentration of the cable occurs at the top of the trapezoidal seabed slope,and under the same curvature radius,the cable stress at the top of the trapezoidal seabed slope is much greater than that at the slope toe,which means under the same curvature radius,the cable stress at the ridge is greater than that at the trench;as the curvature radius increases,the cable stress at the top of the slope is significantly reduced,and there is no significant change in the cable stress at other locations.The research results can provide theoretical support for submarine cable laying facilities.