含腐蚀及椭圆度缺陷管道的动态屈曲传播研究
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摘要
通过建立有限元模型对海底管道的真实工况进行数值模拟,计算准静态条件下的管道压溃压力以及屈曲传播压力,并与管道全尺寸试验结果以及DNV-OS-F101规范中的计算结果进行对比,验证模型的准确性;在有限元模型中利用数据传递的方法将准静态条件下管道局部压溃的受力状态传递到动态模型中,并对管道在动态条件下的变形特点进行探究;研究管道腐蚀深度、初始椭圆度以及加载的传播压力对屈曲剖面长度、屈曲传播速度和反向椭圆度等管道动态屈曲传播特征值的影响。研究结果表明:在加载压力较小时,管道屈曲剖面长度随压力增大而减小;管道屈曲传播速度随着压力和初始缺陷的增大而加快;管道反向椭圆度的出现会阻碍屈曲沿管道轴线的传播,管道反向椭圆度随压力增大而增大。
A finite element model was used to simulate the subsea pipelines in practical engineering. The results of collapse pressure and propagation pressure were compared with those of full-scale collapse test and the calculation results of DNV-OS-F101 specification, and the accuracy of the model was verified. A method called data transfer in the finite element simulation was used to transfer the quasi-static stress state of the collapsed pipeline to the dynamic model. In this way, the deformation characteristics of the pipeline under the dynamic condition was studied. Besides, the influences of corrosion depth, ovality and the external pressure on dynamic characteristic values of pipeline such as the length of buckle profile, the buckle velocity and the reverse ovality were researched. The results show that the length of buckle profile of pipeline decreases with the increase of loading pressure at low pressure. The buckle velocity of pipeline increases with the increase of pressure and the initial imperfection. The appearance of reverse ovality of pipeline will hinder the propagation of buckling along the pipeline axis, and the pipeline reverse ovality increases with the increase of pressure.
A finite element model was used to simulate the subsea pipelines in practical engineering. The results of collapse pressure and propagation pressure were compared with those of full-scale collapse test and the calculation results of DNV-OS-F101 specification, and the accuracy of the model was verified. A method called data transfer in the finite element simulation was used to transfer the quasi-static stress state of the collapsed pipeline to the dynamic model. In this way, the deformation characteristics of the pipeline under the dynamic condition was studied. Besides, the influences of corrosion depth, ovality and the external pressure on dynamic characteristic values of pipeline such as the length of buckle profile, the buckle velocity and the reverse ovality were researched. The results show that the length of buckle profile of pipeline decreases with the increase of loading pressure at low pressure. The buckle velocity of pipeline increases with the increase of pressure and the initial imperfection. The appearance of reverse ovality of pipeline will hinder the propagation of buckling along the pipeline axis, and the pipeline reverse ovality increases with the increase of pressure.
引文
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[15]YU Jianxing,SUN Zhenzhou,LIU Xiaoxie,et al.Ring-truss theory on offshore pipelines buckle propagation[J].Thin-Walled Structures,2014,85:313-323.
[16]刘源,苗春生,余建星,等.海底管道屈曲传播中管壁与扣入式止屈器非线性接触问题研究[J].天津大学学报(自然科学与工程技术版),2017,50(3):225-232.LIU Yuan,MIAO Chunsheng,YU Jianxing,et al.Nonlinear contact between subsea pipeline and slip-on arrestor during the process of buckling propagation[J].Journal of Tianjin University(Science and Technology),2017,50(3):225-232.
[17]陈飞宇,余建星,赵羿羽,等.复杂载荷条件下有缺陷海底管道非线性屈曲分析[J].中南大学学报(自然科学版),2015,46(7):2701-2706.CHEN Feiyu,YU Jianxing,ZHAO Yiyu,et al.Nonlinear buckling of subsea pipes with imperfection under complex loads[J].Journal of Central South University(Science and Technology),2015,46(7):2701-2706.
[18]GONG Shunfeng,NI Xingyue,BAO Sheng,et al.Asymmetric collapse of offshore pipelines under external pressure[J].Ships and Offshore Structures,2013,8(2):176-188.
[19]KYRIAKIDES S,BABCOCK C D.On the dynamics and the arrest of the propagating buckle in offshore pipelines[C]//Proceedings of the Annual Offshore Technology Conference.Texas,USA.1979:1-12.
[20]DNV-OS-F101,Submarine pipeline systems[S].
[2]曹永升,王沙,赵晨,等.海底集输管道的破坏与防护[J].化学工程与装备,2013(7):98-99.CAO Yongsheng,WANG Sha,ZHAO Chen,et al.Destruction and protection for the offshore gathering pipeline[J].Chemical Engineering&Equipment,2013(7):98-99.
[3]MESLOH R E,SORENSON J E,ATTERBURY T J.Buckling and offshore pipelines[J].Gas,1973(7):40-43.
[4]PALMER A C,MARTIN J H.Buckle propagation in submarine pipelines[J].Nature,1975,254:46-48.
[5]CROLL J G A.Analysis of buckle propagation in marine pipelines[J].Journal of Constructional Steel Research,1985,5(2):103-122.
[6]KYRIAKIDES S,CHANG Y C.On the effect of axial tension on the propagation pressure of long cylindrical shells[J].International Journal of Mechanical Sciences,1992,34(1):3-15.
[7]KYRIAKIDES S,NETTO T A.On the dynamics of propagating buckles in pipelines[J].International Journal of Solids&Structures,2000,37(46/47):6843-6867.
[8]CORONA E,KYRIAKIDES S.On the collapse of inelastic tubes under combined bending and pressure[J].International Journal of Solids&Structures,2015,24(5):505-535.
[9]ALBERMANI F,KHALILPASHA H,KARAMPOUR H.Propagation buckling in deep sub-sea pipelines[J].Engineering Structures,2011,33(9):2547-2553.
[10]KHALILPASHA H,ALBERMANI F.Hyperbaric chamber test of subsea pipelines[J].Thin-Walled Structures,2013,71:1-6.
[11]RAMASAMY R,TUAN YA T M Y S.Nonlinear finite element analysis of collapse and post-collapse behaviour in dented submarine pipelines[J].Applied Ocean Research,2014,46:116-123.
[12]贾旭,侯静,田英辉.静水压力作用下海底单层保温管道压溃屈曲分析[J].中国海上油气,2006,18(5):341-343.JIA Xu,HOU Jing,TIAN Yinghui.The buckling analysis on single layer insulation pipeline acting by external hydrostatic pressure[J].China Offshore Oil and Gas,2006,18(5):341-343.
[13]余建星,卞雪航,余杨,等.深水海底管道全尺寸压溃试验及数值模拟[J].天津大学学报(自然科学与工程技术版),2012,45(2):154-159.YU Jianxing,BIAN Xuehang,YU Yang,et al.Full-scale collapse test and numerical simulation of deepwater pipeline[J].Journal of Tianjin University(Science and Technology),2012,45(2):154-159.
[14]余建星,李骁,徐立新,等.深水海底管道凹陷机理[J].天津大学学报(自然科学与工程技术版),2015,48(11):1009-1013.YU Jianxing,LI Xiao,XU Lixin,et al.Denting mechanism of deepwater pipeline[J].Journal of TianJin University(Science and Technology),2015,48(11):1009-1013.
[15]YU Jianxing,SUN Zhenzhou,LIU Xiaoxie,et al.Ring-truss theory on offshore pipelines buckle propagation[J].Thin-Walled Structures,2014,85:313-323.
[16]刘源,苗春生,余建星,等.海底管道屈曲传播中管壁与扣入式止屈器非线性接触问题研究[J].天津大学学报(自然科学与工程技术版),2017,50(3):225-232.LIU Yuan,MIAO Chunsheng,YU Jianxing,et al.Nonlinear contact between subsea pipeline and slip-on arrestor during the process of buckling propagation[J].Journal of Tianjin University(Science and Technology),2017,50(3):225-232.
[17]陈飞宇,余建星,赵羿羽,等.复杂载荷条件下有缺陷海底管道非线性屈曲分析[J].中南大学学报(自然科学版),2015,46(7):2701-2706.CHEN Feiyu,YU Jianxing,ZHAO Yiyu,et al.Nonlinear buckling of subsea pipes with imperfection under complex loads[J].Journal of Central South University(Science and Technology),2015,46(7):2701-2706.
[18]GONG Shunfeng,NI Xingyue,BAO Sheng,et al.Asymmetric collapse of offshore pipelines under external pressure[J].Ships and Offshore Structures,2013,8(2):176-188.
[19]KYRIAKIDES S,BABCOCK C D.On the dynamics and the arrest of the propagating buckle in offshore pipelines[C]//Proceedings of the Annual Offshore Technology Conference.Texas,USA.1979:1-12.
[20]DNV-OS-F101,Submarine pipeline systems[S].