错边对钢悬链立管横焊接头疲劳性能的影响
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摘要
采用填丝TIG方法进行了不同错边量的立管环缝横焊试验,对其接头试样在80,120和175 MPa应力范围下进行了疲劳试验,研究错边对横焊环缝接头疲劳性能的影响.结果表明,错边方式对横焊接头疲劳裂纹起裂位置有重要影响,"上错边"接头的疲劳裂纹主要从根部焊趾上侧起裂,无错边接头的疲劳裂纹主要从根部焊趾下侧起裂,而"下错边"接头的疲劳裂纹则全部从根部焊趾下侧起裂;在相同应力范围下,试样的疲劳循环周次随错边量的增大而降低,当错边量超过0.60 mm后,疲劳循环周次会显著下降.
In order to investigate the effect of misalignment on the horizontal girth weld fatigue performance,the joints of steel catenary riser were welded by TIG welding with filler wire and the fatigue tests of the joints were carried out at the stress range of 80, 120 and 175 MPa, respectively.The results indicated that the misalignment mode has a significant influence on the fatigue cracking initiation position of horizontal welding joints. The fatigue crack of uppermisalignment-joint is almost from the upper side of the root toe, and the fatigue crack of joints without misalignment is mainly from the bottom of the root toe, besides, the fatigue crack of down-misalignment-joint is all from the bottom of the root toe. In addition, the fatigue endurance of the specimens is decreased continuously with the increase of the misalignment values at the same stress range, and which is reduced obviously when the misalignment values exceed 0.60 mm.
In order to investigate the effect of misalignment on the horizontal girth weld fatigue performance,the joints of steel catenary riser were welded by TIG welding with filler wire and the fatigue tests of the joints were carried out at the stress range of 80, 120 and 175 MPa, respectively.The results indicated that the misalignment mode has a significant influence on the fatigue cracking initiation position of horizontal welding joints. The fatigue crack of uppermisalignment-joint is almost from the upper side of the root toe, and the fatigue crack of joints without misalignment is mainly from the bottom of the root toe, besides, the fatigue crack of down-misalignment-joint is all from the bottom of the root toe. In addition, the fatigue endurance of the specimens is decreased continuously with the increase of the misalignment values at the same stress range, and which is reduced obviously when the misalignment values exceed 0.60 mm.
引文
[1]Li M J,Duan M L,Yu F F,et al.Model test investigation on a jLay system designed for deepwater pipeline installation in south china sea[J].Applied Mechanics and Materials,2011,138-139:484-491.
[2]周灿丰,焦向东,曹静,等.海洋深水立管环缝疲劳性能研究现状及建议[J].焊接,2011(4):5-10.Zhou Canfeng,Jiao Xiangdong,Cao Jing,et al.Research status and suggestions on fatigue behavior of ring joints of offshore deepwater risers[J].Welding&Joining,2011(4):5-10.
[3]Maddox S J,Speck J B,Razmjoo G R.An investigation of the fatigue performance of riser girth welds[J].Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME,2008,130(0110071).
[4]Zhang Y H,Maddox S J.Fatigue testing of full scale girth welded pipes under variable amplitude loading[J].Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME,2014,136(021401-12).
[5]Netto T,Botto A,Lourenco M.Fatigue performance of prestrained pipes with girth weld defects:local deformation mechanisms under bending[J].International Journal of Fatigue,2008,30(6):1080-1091.
[6]李云龙,庄传晶,冯耀荣,等.油气输送管道疲劳寿命分析及预测[J].油气储运,2004(12):41-43.Li Yunlong,Zhuang Chuanjing,Feng Yaorong,et al.Analysis and predication on fatigue life of oil and gas pipelines[J].OGST,2004(12):41-43.
[7]Zhuang C J,Huo C Y,Feng Y R.Full-scale fatigue test on X60spiral linepipe[C]//25th International Conference on Offshore Mechanics and Arctic Engineering(OMAE 2006),2006,17-23.
[8]胡艳华,唐德渝,方总涛,等.X65钢级海洋管道全尺寸疲劳性能试验研究[J].石油工程建设,2014(6):29-32.Hu Yanhua,Tang Deyu,Fang Zongtao,et al.Full-scale fatigue test research of X65 steel submarine pipeline[J].Petroleum Engineer Construction,2014(6):29-32.
[9]Gurney T R.焊接结构的疲劳[M].北京:机械工业出版社,1988.
[10]王东坡,周达.超声冲击法提高焊接接头疲劳强度的机理分析[J].天津大学学报,2007(5):623-628.Wang Dongpo,Zhou Da.Mechanism analysis of fatigue strength improvement of welded joints by ultrasonic peening method[J].Journal of Tianjin University,2007(5):623-628.
[11]Hobbacher A.ⅡW reco mmendations for fatigue design of welded joints and components[M].New York:WRC,2009.
[2]周灿丰,焦向东,曹静,等.海洋深水立管环缝疲劳性能研究现状及建议[J].焊接,2011(4):5-10.Zhou Canfeng,Jiao Xiangdong,Cao Jing,et al.Research status and suggestions on fatigue behavior of ring joints of offshore deepwater risers[J].Welding&Joining,2011(4):5-10.
[3]Maddox S J,Speck J B,Razmjoo G R.An investigation of the fatigue performance of riser girth welds[J].Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME,2008,130(0110071).
[4]Zhang Y H,Maddox S J.Fatigue testing of full scale girth welded pipes under variable amplitude loading[J].Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME,2014,136(021401-12).
[5]Netto T,Botto A,Lourenco M.Fatigue performance of prestrained pipes with girth weld defects:local deformation mechanisms under bending[J].International Journal of Fatigue,2008,30(6):1080-1091.
[6]李云龙,庄传晶,冯耀荣,等.油气输送管道疲劳寿命分析及预测[J].油气储运,2004(12):41-43.Li Yunlong,Zhuang Chuanjing,Feng Yaorong,et al.Analysis and predication on fatigue life of oil and gas pipelines[J].OGST,2004(12):41-43.
[7]Zhuang C J,Huo C Y,Feng Y R.Full-scale fatigue test on X60spiral linepipe[C]//25th International Conference on Offshore Mechanics and Arctic Engineering(OMAE 2006),2006,17-23.
[8]胡艳华,唐德渝,方总涛,等.X65钢级海洋管道全尺寸疲劳性能试验研究[J].石油工程建设,2014(6):29-32.Hu Yanhua,Tang Deyu,Fang Zongtao,et al.Full-scale fatigue test research of X65 steel submarine pipeline[J].Petroleum Engineer Construction,2014(6):29-32.
[9]Gurney T R.焊接结构的疲劳[M].北京:机械工业出版社,1988.
[10]王东坡,周达.超声冲击法提高焊接接头疲劳强度的机理分析[J].天津大学学报,2007(5):623-628.Wang Dongpo,Zhou Da.Mechanism analysis of fatigue strength improvement of welded joints by ultrasonic peening method[J].Journal of Tianjin University,2007(5):623-628.
[11]Hobbacher A.ⅡW reco mmendations for fatigue design of welded joints and components[M].New York:WRC,2009.