含凹陷厚壁深海管道压溃失效模式和压溃压力预测方法  

Collapse Failure Modes and Method to Predict Collapse Pressure of Thick-walled Deepsea Pipelines with Dent Defects

作　　者：侯富恒 陈严飞[1] 贾鲁生 张琦[1] 吴祖明 刘宇[1] 王春莎 HOU Fu-heng;CHEN Yan-fei;JIA Lu-sheng;ZHANG Qi;WU Zu-ming;LIU Yu;WANG Chun-sha(National Engineering Laboratory for Pipeline Safety,China University of Petroleum,Beijing 102249,China;Research Institute of China National Offshore Oil Corporation,Beijing 100028,China)

机构地区：[1]中国石油大学(北京)油气管道输送安全国家工程实验室,北京102249 [2]中海油研究总院,北京100028

出　　处：《船海工程》2025年第1期140-145,共6页Ship & Ocean Engineering

基　　金：国家自然科学基金(52171285)。

摘　　要：明确含凹陷深海管道的压溃失效规律,准确预测其压溃压力显得尤为重要。文中采用非线性有限元方法,考虑球形压头和楔形压头引发的凹陷形状的影响,对凹陷管道压溃失效进行参数敏感性分析,提出将凹陷最深处的椭圆度作为描述凹陷缺陷严重程度的控制参数,得到径厚比和椭圆度等参数对压溃失效模式和压溃压力的影响规律。通过回归分析得到凹陷厚壁深海管道压溃压力的计算公式,可以为含凹陷深海管道的完整性评价提供参考。It is of practice importance to comprehend the collapse failure mechanism of dented pipe and accurately predict the collapse pressure of dented pipeline.The finite element model for deep-sea pipeline with dent was established considering the spherical and wedged indenter respectively.Through comparing the parameters such as dent depth and ovality,it was proven that the collapse pressures of pipelines with dent are identical for those with the same ovality.In other words,the ovality can be used as a control parameter to describe severity of dent defect.The effect of diameter-thickness ratio and ovality on the collapse failure mode and collapse pressure of dented pipeline was investigated.The regression equation for predicting collapse failure of pipeline with dent defects was proposed,providing a reference for the integrity evaluation of deep-sea pipelines with dents.

关 键 词：深海管道 凹陷 椭圆度 压溃失效 完整性评价 

分 类 号：U661.4[交通运输工程—船舶及航道工程] TE973[交通运输工程—船舶与海洋工程]