海洋柔性管道接头楔形环锯齿密封性能数值模拟
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摘要
密封环上的锯齿对非粘接管道接头密封性能影响明显,而实际分析密封结构时很难建立带锯齿的精细模型。针对某海域使用的非粘接管道接头密封环,明确了适用的密封准则,建立了锯齿密封模型,根据压入深度的敏感度分析得到了最佳压入深度范围,并提取了对应的放大系数,结果表明:该模型结构有一个较优的压入深度范围,在该范围内密封性能的最大接触压力及有效密封长度比例取值均较优;采用无锯齿简化模型结合放大系数可以近似预测真实结构的密封性能。该研究方法可为精细化设计楔形密封环几何尺寸提供指导,同时也可为分析尺度跨度较大的结构提供思路。
The serrated teeth in the sealing ring have significant effect on the sealing performance of end fitting of unbounded pipeline, but it is practically difficult to establish a fine model to analyze the sealing structure with serrated teeth. In this paper, the sealing ring inside the end fitting of unbonded pipeline used in one certain sea area was taken as an example. The suitable sealing criterion was defined and the sealing model with serrated teeth was established. Then, the range of optimal penetration depth was obtained based on the sensitivity analysis of penetration depth, and the amplification factor corresponding to the range of optimal penetration depth was calculated. It is indicated that this model structurally has a better penetration depth range, in which the maximum contact pressure and effective sealing length ratio of sealing performance are both better. Besides, by means of the simplified model without serrated teeth, combined with the amplification factor, the sealing performance of an actual structure can be predicated approximately. This method provides the guidance for precisely designing the geometry of wedgy sealing ring, as well as the idea for analyzing the structures with large scale span.
The serrated teeth in the sealing ring have significant effect on the sealing performance of end fitting of unbounded pipeline, but it is practically difficult to establish a fine model to analyze the sealing structure with serrated teeth. In this paper, the sealing ring inside the end fitting of unbonded pipeline used in one certain sea area was taken as an example. The suitable sealing criterion was defined and the sealing model with serrated teeth was established. Then, the range of optimal penetration depth was obtained based on the sensitivity analysis of penetration depth, and the amplification factor corresponding to the range of optimal penetration depth was calculated. It is indicated that this model structurally has a better penetration depth range, in which the maximum contact pressure and effective sealing length ratio of sealing performance are both better. Besides, by means of the simplified model without serrated teeth, combined with the amplification factor, the sealing performance of an actual structure can be predicated approximately. This method provides the guidance for precisely designing the geometry of wedgy sealing ring, as well as the idea for analyzing the structures with large scale span.
引文
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[9]冯秀,顾伯勤,孙见君,等.金属垫片密封机制研究[J].润滑与密封,2007,32(10):97-99.FENG X,GU B Q,SUN J J,et al.Research on sealing mechanism of metallic gaskets[J].Lubrication Engineering,2007,32(10):97-99.
[10]冯秀,陆锋.基于分形理论的粗糙密封表面接触模型[J].苏州大学学报(工科版),2008,28(3):29-33.FENG X,LU F.Contact model of sealing surfaces based on fractal theory[J].Journal of Suzhou University(Engineering Science Edition),2008,28(3):29-33.
[11]吴敬凯.非均质材料力学性能与失效分析的多尺度有限元法研究[D].大连:大连理工大学,2013:1-10.WU J K.Study on multiscale finite element method for mechanical behavior and failure analyses of heterogeneous materials[D].Dalian:Dalian University of Technology,2013:1-10.
[12]郑延丰,罗尧治.基于有限质点法的多尺度精细化分析[J].工程力学,2016,33(9):21-29.ZHENG Y F,LUO Y Z.Multi-scale fi ne analysis based on the fi nite particle method[J].Engineering Mechanics,2016,33(9):21-29.
[13]BANKE L.Composite flexible pipe end fitting seals tested thermo-mechanically[J].Offshore,1999,58(8):146.
[14]陈孙艺.采用垫片安全系数的高压法兰螺栓密封设计[J].润滑与密封,2015,40(6):122-126.CHEN S Y.Design of sealing of high pressure fl ange bolts using gasket safety factor[J].Lubrication Engineering,2015,40(6):122-126.
[15]BANKE L,JENSEN T G.Test of seal system for fl exible pipe end fi tting[C].St John’s:OMAE'99,1999:2-4.
[16]安少军.深水海底管道套筒连接器密封接触特性研究[D].哈尔滨:哈尔滨工程大学,2012:98.AN S J.Research on sealing and contact characteristics of deepwater subsea pipeline collet connector[D].Harbin:Harbin Engineering University,2012:98.
[17]李智,李俊涛,张永军.基于ALE方法的金属切削过程有限元研究[J].现代制造技术与装备,2013(1):16-17,21.LI Z,LI J T,ZHANG Y J.Finite element analysis of metal cutting process based on ALE method[J].Modern Manufacturing Technology&Equipment,2013(1):16-17,21.
[18]刘健,仇性启,薄万顺,等.橡胶O形密封圈最大接触压力数值分析[J].润滑与密封,2010,35(1):41-44.LIU J,QIU X Q,BO W S,et al.Numerical analysis on the maximum contact pressure of rubber O-ring[J].Lubrication Engineering,2010,35(1):41-44.
[19]李双喜,黄克松,蔡纪宁,等.中压机械密封端面接触状态和应力研究[J].润滑与密封,2016,41(1):10-14.LI S X,HUANG K S,CAI J N,et al.Study on contact state and pressure of medium pressure mechanical seals[J].Lubrication Engineering,2016,41(1):10-14.
[20]冯秀,魏龙.金属垫片有效密封宽度有限元分析[J].流体机械,2008,36(9):45-48.FENG X,WEI L.Finite element analysis for the metallic gasket effective width[J].Fluid Machinery,2008,36(9):45-48.
[2]尚道健.海洋非粘接管道接头内的粘接问题研究[D].大连:大连理工大学,2015:3-4.SHANG D J.Investigation on adhesion of unbonded fl exible pipe end fi tting[D].Dalian:Dalian University of Technology,2015:3-4.
[3]李翔云.海洋非粘结柔性管道接头结构设计与分析研究[D].大连:大连理工大学,2014:5-6.LI X Y.Investigation of design and analysis for unbonded fl exible pipe end fi tting structure[D].Dalian:Dalian University of Technology,2014:5-6.
[4]毛庆凯.海洋柔性管接头设计关键问题研究[D].大连:大连理工大学,2013:34-46.MAO Q K.Key design issues of offshore flexible pipe end fitting[D].Dalian:Dalian University of Technology,2013:34-46.
[5]FERNANDO U S,NOTT P,GRAHAM G,et al.Experimental evaluation of the metal-to-metal seal design for high-pressure flexible pipes[C].Houston:Offshore Technology Conference,2012:23110-MS.
[6]FERNANDO U S,KARABELAS G.Analysis of end fitting barrier seal performance in high pressure unbonded flexible pipes[C].San Francisco:ASME International Conference on Ocean,2014:OMAE2014-23574.
[7]李翔云,毕祥军,王刚,等.海洋非黏结柔性管道接头密封结构分析[J].计算机辅助工程,2014,23(6):56-60.LI X Y,BI X J,WANG G,et al.Analysis on sealing structure of unbonded fl exible marine pipe end fi tting[J].Computer Aided Engineering,2014,23(6):56-60.
[8]李振涛,孙鑫晖,张玉满,等.O形密封圈密封性能非线性有限元数值模拟[J].润滑与密封,2011,36(9):86-90.LI Z T,SUN X H,ZHANG Y M,et al.Finite element numerical simulation of the sealing performance of O-ring seals[J].Lubrication Engineering,2011,36(9):86-90.
[9]冯秀,顾伯勤,孙见君,等.金属垫片密封机制研究[J].润滑与密封,2007,32(10):97-99.FENG X,GU B Q,SUN J J,et al.Research on sealing mechanism of metallic gaskets[J].Lubrication Engineering,2007,32(10):97-99.
[10]冯秀,陆锋.基于分形理论的粗糙密封表面接触模型[J].苏州大学学报(工科版),2008,28(3):29-33.FENG X,LU F.Contact model of sealing surfaces based on fractal theory[J].Journal of Suzhou University(Engineering Science Edition),2008,28(3):29-33.
[11]吴敬凯.非均质材料力学性能与失效分析的多尺度有限元法研究[D].大连:大连理工大学,2013:1-10.WU J K.Study on multiscale finite element method for mechanical behavior and failure analyses of heterogeneous materials[D].Dalian:Dalian University of Technology,2013:1-10.
[12]郑延丰,罗尧治.基于有限质点法的多尺度精细化分析[J].工程力学,2016,33(9):21-29.ZHENG Y F,LUO Y Z.Multi-scale fi ne analysis based on the fi nite particle method[J].Engineering Mechanics,2016,33(9):21-29.
[13]BANKE L.Composite flexible pipe end fitting seals tested thermo-mechanically[J].Offshore,1999,58(8):146.
[14]陈孙艺.采用垫片安全系数的高压法兰螺栓密封设计[J].润滑与密封,2015,40(6):122-126.CHEN S Y.Design of sealing of high pressure fl ange bolts using gasket safety factor[J].Lubrication Engineering,2015,40(6):122-126.
[15]BANKE L,JENSEN T G.Test of seal system for fl exible pipe end fi tting[C].St John’s:OMAE'99,1999:2-4.
[16]安少军.深水海底管道套筒连接器密封接触特性研究[D].哈尔滨:哈尔滨工程大学,2012:98.AN S J.Research on sealing and contact characteristics of deepwater subsea pipeline collet connector[D].Harbin:Harbin Engineering University,2012:98.
[17]李智,李俊涛,张永军.基于ALE方法的金属切削过程有限元研究[J].现代制造技术与装备,2013(1):16-17,21.LI Z,LI J T,ZHANG Y J.Finite element analysis of metal cutting process based on ALE method[J].Modern Manufacturing Technology&Equipment,2013(1):16-17,21.
[18]刘健,仇性启,薄万顺,等.橡胶O形密封圈最大接触压力数值分析[J].润滑与密封,2010,35(1):41-44.LIU J,QIU X Q,BO W S,et al.Numerical analysis on the maximum contact pressure of rubber O-ring[J].Lubrication Engineering,2010,35(1):41-44.
[19]李双喜,黄克松,蔡纪宁,等.中压机械密封端面接触状态和应力研究[J].润滑与密封,2016,41(1):10-14.LI S X,HUANG K S,CAI J N,et al.Study on contact state and pressure of medium pressure mechanical seals[J].Lubrication Engineering,2016,41(1):10-14.
[20]冯秀,魏龙.金属垫片有效密封宽度有限元分析[J].流体机械,2008,36(9):45-48.FENG X,WEI L.Finite element analysis for the metallic gasket effective width[J].Fluid Machinery,2008,36(9):45-48.