海洋双金属复合管的冲击载荷响应

针对锚击等第三方威胁对双金属复合管产生外部冲击的问题，通过数值模拟仿真研究承受外部冲击载荷的双金属复合管的结构响应，分析不同落锚速度、冲击方向、管道运行状况、运行压力、锚质量对双金属复合管性能的影响。结果表明：管道凹陷损伤随落锚速度和锚质量的增加而增大，基衬分离程度随冲击方向呈现出不同的响应；垂直于管道轴线方向的冲击会造成最严重的损伤，但基衬分离程度最小；管道内压越大，管道的凹陷损伤越小，基衬分离程度越小；空管状况下管道受到的损伤最大，基衬分离程度最大。

Structure Response of Submarine Bimetallic Lined Pipe Under Impact

Aiming at the external impact of the bimetallic lined pipe caused by third-party threats such as anchoring, numerical simulation is used to study the structural response of the bimetallic lined pipe subjected to external impact loads. The effects of different anchoring speeds, impact directions, pipeline operating conditions, operating pressure and anchor mass on the performance of the bimetallic lined pipe are investigated. The results show that: the damage of the bimetallic lined pipe increases with the increase of anchoring speed and anchor mass; the degree of liner separation shows a different response with the impact direction; the impact perpendicular to the pipeline axis causes the most serious damage and the smallest liner separation; the greater the internal pressure of the pipeline, the smaller the indentation damage of the pipeline and the smaller the degree of liner separation; if the pipeline is empty, the damage to the pipeline is the largest, and the degree of liner separation is the largest.