含体积型缺陷X80钢长距离输气管道安全评价  

Safety evaluation of X80 steel long-distance gas transmission pipeline with volumetric defects

作　　者：刘涛 吕加华 Liu Tao;Lv Jiahua(SINOPEC Petroleum Engineering&Construction Corporation,Beijing 100020;SINOPEC Petroleum Engineering Corporation,Dongying,Shandong 257000)

机构地区：[1]中石化石油工程建设有限公司,北京市100020 [2]中石化石油工程设计有限公司,山东省东营市257000

出　　处：《炼油技术与工程》2022年第6期23-26,共4页Petroleum Refinery Engineering

摘　　要：针对含体积型缺陷的X80钢长距离输气管道,利用有限元方法对含球形、椭球形和矩形槽缺陷的管道进行力学行为研究。基于含体积型缺陷X80管道的受力情况,利用WORKBENCH有限元软件进行了管内壁和外壁缺陷敏感性分析,结果表明,内压作用下内壁缺陷比外壁缺陷表现更为敏感。对比了不同形状体积型缺陷下的应力分布规律,结果表明,管道的应力集中主要在管道缺陷轴向部位,并且随着缺陷深度和轴向长度的增大应力明显增高。在此基础上分析了在塑性失效准则下含体积缺陷X80管道的极限承载,并将计算结果与PCORRC计算方法进行对比验证有限元结果的正确性。Aiming at X80 steel long-distance gas transmission pipeline with volume defects, the mechanical behavior of pipeline with spherical, ellipsoidal and rectangular groove defects is studied by finite element method. Based on the stress condition of the pipeline, the sensitivity analysis of inner and outer wall defects is carried out by using workbench finite element software. The results show that the inner wall defects are more sensitive than the outer wall defects under internal pressure. The stress distribution under different shape volume defects is compared, and the results show that the stress concentration of the pipeline is mainly in the axial part of the pipeline defect, and the stress increases significantly with the increase of the defect depth and axial length. On this basis, the ultimate bearing capacity of X80 pipeline with volume defects under plastic failure criterion is analyzed, and the calculation results are compared with PCORRC calculation method to verify the correctness of the finite element results.

关 键 词：X80 体积型缺陷 气体长输管道 安全评价 有限元模型 应力分布 非线性有限元 

分 类 号：TE973[石油与天然气工程—石油机械设备]