连续双层缺陷海底管道剩余强度有限元分析  

Finite Element Analysis of Residual Strength of Submarine Pipelines with Continuous Double-layer Defects

作　　者：王豪巍 WANG Hao-wei(Pipeline Investigation Operation Department of CNOOC Technology Testing Co.,LTD,Tianjin 300450,China)

机构地区：[1]中海石油技术检测有限公司管道勘察作业部,天津300450

出　　处：《管道技术与设备》2022年第4期22-25,52,共5页Pipeline Technique and Equipment

摘　　要：为研究上层缺陷尺寸变化对海底管道剩余强度的影响,利用非线性有限元方法,采用塑性失效准则,模拟计算具有连续双层缺陷的海底管道剩余强度。根据计算结果,分析剩余强度的变化规律,并且将结果与采用ASME B31G—2012和DNVGL-RP-F101评价方法的结果进行对比。研究结果表明:在连续双层缺陷海底管道剩余强度随缺陷相对尺寸的变化过程中,剩余强度的变化具有规律性。对该种类型缺陷管道,使用DNVGL-RP-F101方法的计算结果保守性低,优于使用ASME B31G—2012方法,采取合适的剩余强度评价方法,能够保障管道安全运行。In order to study the influence of the size change of upper layer defects on the residual strength of submarine pipeline, the residual strength of submarine pipeline with continuous double-layer defects was simulated and calculated by using nonlinear finite element method and plastic failure criterion. According to the calculation results, the variation rule of residual strength was analyzed, and the results were compared with evaluation method results of ASME B31 G—2012 and DNVGL-RP-F101. The results show that the variation of residual strength is regular in the changing process of continuous double-layer defect submarine pipeline residual strength with relative defect size. For this type of defective pipeline, the results calculated by DNVGL-RP-F101 method are less conservative than those obtained by ASME B31 G—2012 method. Using appropriate strength evaluation method can ensure the safe operation of pipeline.

关 键 词：海底管道 连续双层缺陷 剩余强度 非线性有限元法 

分 类 号：TE88[石油与天然气工程—油气储运工程]