长输管道凹陷提压回圆评价方法
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摘要
为了解决长输管道深凹陷所导致的清管器及内检测器难以通过的工程问题,基于局部提高管道内压可使凹陷回圆、深度减小以达到清管器或检测器可通过深度门槛值的思想,建立了内压作用下管道凹陷回圆过程非线性有限元模型;提出了管道凹陷回圆系数的定义;通过应力应变响应分析对凹陷回圆过程的安全性进行论证;对回圆系数的影响因素进行分析,探讨径厚比、管材、凹陷尺寸、初始内压、回圆压力等参数对回圆系数的影响;基于有限元计算算例,采用非线性回归的方法拟合了凹陷回圆系数工程计算公式。研究结果表明:在极限回圆压力工况下,凹陷回圆过程中管道未发生二次塑性损伤;误差分析显示拟合所得公式预测精度较好,可用于长输管道凹陷的回圆评价。
In order to solve the engineering problem about the difficult passage of pigging device and internal detector caused by the deep dent of long-distance pipeline,based on the idea that locally increasing the internal pressure of pipeline can make the dent rerounding and reduce the dent depth to a threshold value that the pigging device or detector can pass through,a nonlinear finite element model for the process of pipeline's dent rerounding under the internal pressure was established.The definition of pipeline's dent rerounding coefficient was put forward,and the safety of the dent rerounding process was demonstrated by the stress-strain response analysis. The factors affecting the rerounding coefficient were analyzed,and the influence of parameters such as diameter-thickness ratio,pipe material,dent size,initial internal pressure and rerounding pressure on the rerounding coefficient were discussed. Based on the finite element calculation example,the engineering calculation formula of the dent rerounding coefficient was fitted by the nonlinear regression method. The results showed that no secondary plastic damage occurred in the pipeline during the dent rerounding process. The error analysis showed that the fitted formula had good prediction accuracy,and it can be used for the rerounding evaluation of dent on the long-distance pipeline.
In order to solve the engineering problem about the difficult passage of pigging device and internal detector caused by the deep dent of long-distance pipeline,based on the idea that locally increasing the internal pressure of pipeline can make the dent rerounding and reduce the dent depth to a threshold value that the pigging device or detector can pass through,a nonlinear finite element model for the process of pipeline's dent rerounding under the internal pressure was established.The definition of pipeline's dent rerounding coefficient was put forward,and the safety of the dent rerounding process was demonstrated by the stress-strain response analysis. The factors affecting the rerounding coefficient were analyzed,and the influence of parameters such as diameter-thickness ratio,pipe material,dent size,initial internal pressure and rerounding pressure on the rerounding coefficient were discussed. Based on the finite element calculation example,the engineering calculation formula of the dent rerounding coefficient was fitted by the nonlinear regression method. The results showed that no secondary plastic damage occurred in the pipeline during the dent rerounding process. The error analysis showed that the fitted formula had good prediction accuracy,and it can be used for the rerounding evaluation of dent on the long-distance pipeline.
引文
[1] The American Society of Mechanical Engineers. Gas transmission and distribution piping systems:ASME B31. 8[S]. New York:ASME,2007.
[2]杨筱衡,严大凡.逐步实施我国油气管道的完整性管理[J].天然气工业,2004,24(11):32-39.YANG Xiaoheng,YAN Dafan. Phasing in oil and gas pipeline integrity management in our country[J]. Natural Gas Industry,2004,24(11):32-39.
[3]帅义,帅健,苏丹丹.企业级管道完整性管理体系构建模式[J].中国安全科学学报,2016,26(7):147-151.SHUAI Yi,SHUAI Jian,SU Dandan. Mode of constructing pipeline integrity management system for enterprises[J]. China Safety Science Journal,2016,26(7):147-151.
[4]沙胜义,燕冰川,贾光明,等. X65钢制输油管道凹坑全尺寸回弹试验[J].油气储运,2016,35(5):475-477.SHA Shengyi,YAN Bingchuan,JIA Gguangming,et al. Full-scale dent rebound test of X65 steel oil pipeline[J]. Oil&Gas Storage and Transportation,2016,35(5):475-477.
[5] MACDONALD K A,COSHAM A,ALEXANDER C R,et al. Assessing mechanical damage in offshore pipelines-Two case studies[J]. International Journal of Engineering Failures Analysis,2007,14(8):1667-1679.
[6] ADAMS K,ZHOU J. In-service dent management from an operator’s perspective[C]//Proceedings of 5th International Pipeline Conference,Calgary,Alberta,Canada,2004:1239-1245.
[7] DAVID J WARMAN P E,JOHNSTON D,JOHN D MACKENZIE P E. Management of pipeline dents and mechanical damage in gas pipelines[C]//Proceedings of 6th International Pipeline Conference,Calgary,Alberta,Canada,2006.
[8] ALASHTI R A,JAFARI S,HOSSEINIPOUR S J. Experimental and numerical investigation of ductile damage effect on load bearing capacity of a dented API XB pipe subjected to internal pressure[J].Engineering Failure Analysis,2015,47:208-228.
[9]帅义,帅健,狄彦.含凹陷管道全尺寸爆破试验[J].油气储运,2017,36(1):44-48.SHUAI Yi,SHUAI Jian,DI Yan. Full-scale burst experiment on dented pipeline[J]. Oil&Gas Storage and Transportation,2017,36(1):44-48.
[10] ALLOUTI M,SCHMITT C,PLUVINAGE G. Assessment of a gouge and dent defect in a pipeline by a combined criterion[J].Engineering Failure Analysis,2014,36(1):1-13.
[11] YAN S T,SHEN X L,JIN Z J,et al. On elastic-plastic collapse of subsea pipelines under external hydrostatic pressure and denting force[J]. Applied Ocean Research,2016,7(58):305-321.
[12] WU Y,TANG N,ZHANG P. The comparison of dented pipeline displacement calculation methods[J]. Engineering Failure Analysis,2015,23(57):562-573.
[13] WU Y,XIAO J,ZHANG P. The analysis of damage degree of oil and gas pipeline with type II plain dent[J]. Engineering Failure Analysis,2016,30(66):8-19.
[14] BAEK J H,KIM Y P,KIM W S,et al. Load bearing capacity of API X65 pipe with dent defect under internal pressure and in-plane bending[J]. Materials Science&Engineering A(Structural Materials:Properties,Microstructure and Processing),2012,540(16):70-82.
[15] ROSENFELD M J,KIEFNER AND ASSOCIATES. Investigations of dent rerounding behavior[C]//International Pipeline Conference,Calgary,Alberta,Canada,1998:299-307.
[16] ALEXANDER C R,FOWLER J R,KIEFNER J. Repair of dents combined with gouges considering cyclic pressure loading[C]//Proceedings of 8th Annual International Energy Week Conference and Exhibition,Houston,America,1997:11-20.
[2]杨筱衡,严大凡.逐步实施我国油气管道的完整性管理[J].天然气工业,2004,24(11):32-39.YANG Xiaoheng,YAN Dafan. Phasing in oil and gas pipeline integrity management in our country[J]. Natural Gas Industry,2004,24(11):32-39.
[3]帅义,帅健,苏丹丹.企业级管道完整性管理体系构建模式[J].中国安全科学学报,2016,26(7):147-151.SHUAI Yi,SHUAI Jian,SU Dandan. Mode of constructing pipeline integrity management system for enterprises[J]. China Safety Science Journal,2016,26(7):147-151.
[4]沙胜义,燕冰川,贾光明,等. X65钢制输油管道凹坑全尺寸回弹试验[J].油气储运,2016,35(5):475-477.SHA Shengyi,YAN Bingchuan,JIA Gguangming,et al. Full-scale dent rebound test of X65 steel oil pipeline[J]. Oil&Gas Storage and Transportation,2016,35(5):475-477.
[5] MACDONALD K A,COSHAM A,ALEXANDER C R,et al. Assessing mechanical damage in offshore pipelines-Two case studies[J]. International Journal of Engineering Failures Analysis,2007,14(8):1667-1679.
[6] ADAMS K,ZHOU J. In-service dent management from an operator’s perspective[C]//Proceedings of 5th International Pipeline Conference,Calgary,Alberta,Canada,2004:1239-1245.
[7] DAVID J WARMAN P E,JOHNSTON D,JOHN D MACKENZIE P E. Management of pipeline dents and mechanical damage in gas pipelines[C]//Proceedings of 6th International Pipeline Conference,Calgary,Alberta,Canada,2006.
[8] ALASHTI R A,JAFARI S,HOSSEINIPOUR S J. Experimental and numerical investigation of ductile damage effect on load bearing capacity of a dented API XB pipe subjected to internal pressure[J].Engineering Failure Analysis,2015,47:208-228.
[9]帅义,帅健,狄彦.含凹陷管道全尺寸爆破试验[J].油气储运,2017,36(1):44-48.SHUAI Yi,SHUAI Jian,DI Yan. Full-scale burst experiment on dented pipeline[J]. Oil&Gas Storage and Transportation,2017,36(1):44-48.
[10] ALLOUTI M,SCHMITT C,PLUVINAGE G. Assessment of a gouge and dent defect in a pipeline by a combined criterion[J].Engineering Failure Analysis,2014,36(1):1-13.
[11] YAN S T,SHEN X L,JIN Z J,et al. On elastic-plastic collapse of subsea pipelines under external hydrostatic pressure and denting force[J]. Applied Ocean Research,2016,7(58):305-321.
[12] WU Y,TANG N,ZHANG P. The comparison of dented pipeline displacement calculation methods[J]. Engineering Failure Analysis,2015,23(57):562-573.
[13] WU Y,XIAO J,ZHANG P. The analysis of damage degree of oil and gas pipeline with type II plain dent[J]. Engineering Failure Analysis,2016,30(66):8-19.
[14] BAEK J H,KIM Y P,KIM W S,et al. Load bearing capacity of API X65 pipe with dent defect under internal pressure and in-plane bending[J]. Materials Science&Engineering A(Structural Materials:Properties,Microstructure and Processing),2012,540(16):70-82.
[15] ROSENFELD M J,KIEFNER AND ASSOCIATES. Investigations of dent rerounding behavior[C]//International Pipeline Conference,Calgary,Alberta,Canada,1998:299-307.
[16] ALEXANDER C R,FOWLER J R,KIEFNER J. Repair of dents combined with gouges considering cyclic pressure loading[C]//Proceedings of 8th Annual International Energy Week Conference and Exhibition,Houston,America,1997:11-20.