海底管道单、双腐蚀剩余强度影响研究

Research on influence of single and double corrosion on residual strength of submarine pipeline

为研究单、双腐蚀对于海底管道剩余强度的影响,以含有腐蚀缺陷的埋设段海底管道为例,利用Abaqus有限元软件对其进行建模分析。在Abaqus软件中,通过设置管道与腐蚀缺陷的基本参数,对5组不同的单、双腐蚀在正常作业工况和极限作业工况下分别进行有限元模拟分析,根据极限工况的结果求得海底管道的剩余强度。最后利用单腐蚀与双腐蚀的计算结果分析对海底管道剩余强度的影响,同时可以对比2种腐蚀对海底管道剩余强度的影响差异提出建议。

In order to study the influence of single and double corrosion on the residual strength of submarine pipeline,this paper will take the buried submarine pipeline with corrosion defects as an example,and use Abaqus finite element software to model and analyze it.In Abaqus software,after setting the basic parameters of pipeline and corrosion defects,the finite element simulation analysis of five groups of different single corrosion and double corrosion under normal operation condition and limit operation condition is carried out respectively,and then the residual strength of submarine pipeline is obtained according to the results of limit operation condition.Finally,the influence of single corrosion and double corrosion on the residual strength of submarine pipeline is analyzed by using the calculation results of single corrosion and double corrosion.The difference of the residual strength between the two kinds of corrosion can be compared,and some suggestions are put forward.