深海玻纤增强柔性管截面结构设计及强度分析
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摘要
在深海石油开采中,使用传统的钢制管道作为海底管道和立管,存在耐腐蚀性差、重量大以及柔性小等不足。热塑性玻纤增强柔性管具有重量轻、强度高、柔性好以及耐腐蚀性强等优点,逐步成为海洋管道发展的趋势。针对南海500 m海深油井使用玻纤增强柔性管进行增强层截面结构设计,依据DNVGL-RP-F119规范和美国船级社相关规范,针对柔性管增强层缠绕角度及缠绕层数,依据经验建立±30°~±75°缠绕角度和20层~40层缠绕层数的组合模型。利用ABAQUS有限元软件进行30 MPa内压、60 t拉力和5 MPa外压三种载荷工况下的强度分析,得到满足上述载荷工况的最优缠绕角度为±60°;再进行90MPa爆破压力及拉伸与外压组合工况下的强度校核,最后得到能够满足技术指标要求的增强层最优缠绕角度为±60°和最少缠绕层数为36层。
Traditional steel pipes applied to as submarine pipelines and risers in the deep oil exploitation have defects of poor corrosion resistance,large weight and weak flexibility. The thermoplastic glass fiber reinforced flexible pipes with features of high corrosion resistance,light weight and high strength and good flexibility are becoming the trend of marine pipelines development. Aiming at designing cross section structure of reinforcement layer of glass fiber reinforced flexible pipes,which are utilized to oil well in 500 m deep sea,according to DNVGL-RP-F119 specification and ABS relevant regulation,combination models of ± 30° ~ ± 75° winding angle and 20 ~ 40 winding layers are set by experience,in response to the problem of winding angle and winding layers in reinforcement layer.ABAQUS finite element analysis software is employed to make strength analysis under three load cases in which the inner pressure is 30 MPa,tensile load is 60 t,external pressure is 5 MPa. Optimal winding angle ±60° is obtained which is satisfied with above three kinds of load cases. Moreover,after strength check of 90 MPa burst pressure and combined load case of tensile load and external pressure,it reveals that the reinforcement structure in which the optimal winding angle is ±60°and minimum winding layers are 36 can meet the requirement of technical indicators.
Traditional steel pipes applied to as submarine pipelines and risers in the deep oil exploitation have defects of poor corrosion resistance,large weight and weak flexibility. The thermoplastic glass fiber reinforced flexible pipes with features of high corrosion resistance,light weight and high strength and good flexibility are becoming the trend of marine pipelines development. Aiming at designing cross section structure of reinforcement layer of glass fiber reinforced flexible pipes,which are utilized to oil well in 500 m deep sea,according to DNVGL-RP-F119 specification and ABS relevant regulation,combination models of ± 30° ~ ± 75° winding angle and 20 ~ 40 winding layers are set by experience,in response to the problem of winding angle and winding layers in reinforcement layer.ABAQUS finite element analysis software is employed to make strength analysis under three load cases in which the inner pressure is 30 MPa,tensile load is 60 t,external pressure is 5 MPa. Optimal winding angle ±60° is obtained which is satisfied with above three kinds of load cases. Moreover,after strength check of 90 MPa burst pressure and combined load case of tensile load and external pressure,it reveals that the reinforcement structure in which the optimal winding angle is ±60°and minimum winding layers are 36 can meet the requirement of technical indicators.
引文
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[3]刘栋华,张世富.海底管道发展现状浅述[J].中国储运,2011(11):108-109.
[4]王野.海洋非粘结柔性管道结构设计与分析研究[D].大连:大连理工,2013.
[5]American Petroleum Institute.Recommended practice for flexible pipe:API RP 17B-2012[S].USA:API Publications,2012.
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[8]刘昊.深海复合材料立管力学特性分析与优化设计研究[D].上海:上海交通大学,2013.
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[10]陈耕.海洋非粘结柔性管线的横截面力学性能分析[D].哈尔滨:哈尔滨工程大学,2011.
[11]姜豪,杨和振,刘昊.深海非粘结柔性立管简化模型数值分析及实验研究[J].中国舰船研究,2013,8(1):64-72.
[12]M.P.Kruijier,L.L.Warnet,R.Akkerman.Analysis of the mechanical properties of a reinforced thermoplastic pipe(RTP)[J].Composites Part A Applied Science&Manufacturing,2005,36(2):291-300.
[13]张旭昀,孙磊,刘天宇,等.基于ANSYS Workbench有限元法含内腐蚀缺陷套管应力模拟研究[J].化工机械,2015(1):97-100.
[14]R Rafiee,A Amini.Modeling and experimental evaluation of functional failure pressures in glass fiber reinforced polyester pipes[J].Computational Materials Science,2015,96:579-588.
[15]American Bureau of Shipping,Guide for building and classing subsea pipeline systems and risers[S].USA:ABS Publications,2008:3.
[16]林秀锋.钢丝缠绕增强塑料复合管强度分析与优化设计[D].浙江:浙江大学,2006.