【作者】 王建；

【导师】 张崎； 董磊磊；

【作者基本信息】 大连理工大学 ， 船舶与海洋结构物设计制造， 2018， 硕士

【摘要】 随着油气开采逐步向深海进军,海洋管道也随之受到了更多关注。非粘合柔性软管相比于传统钢管,抵抗复杂环境载荷能力强,具有良好的顺应性、耐腐属性等,已成为深海油气开发装备中无可替代的必需品。非粘合柔性软管由多层聚合层和金属螺旋层组成,结构复杂,层间存在大量的接触与滑移现象。在软管安装和运行的过程中,会受到安装机械的挤压、深水水外压、管内流体高温高压的载荷,这些载荷对管体的径向承载能力提出了挑战,因此探究软管抵抗径向载荷的能力是有必要的。本论文着重分析三类软管的径向载荷:压溃载荷、爆破载荷和挤压载荷。首先针对目前的研究现状进行分类调研。然后,直管的抗压溃能力分析中,仅对骨架层进行分析。整理现有的弯曲刚度理论计算方法,对计算得到的不同的临界压溃值进行对比分析;同时利用ANSYS软件建模分析,并讨论初始椭圆度缺陷和摩擦系数对临界压溃值的影响。在弯管的抗压溃能力分析中,理论方面提出一种弯管的临界压溃值理论模型,同时建立了一种数值模拟方法,用来计算弯管的临界压溃值。在抗压铠装层抗爆破能力分析和骨架层抗挤压分析中,整理目前已有的理论模型,并用数值模拟结果与理论结果对比分析;另外运用数值分析方法,讨论初始椭圆度缺陷和摩擦系数对其响应的影响。更多还原

【Abstract】 With the gradual development of oil and gas towards the deep water,more attention has been paid to offshore pipelines.Compared with traditional steel pipe,flexible pipe has stronger resistance to complex environmental loads,good adaptability,corrosion resistance and so on,so it becomes a necessary item in deep sea oil and gas development equipment.The flexible pipe is made up of multi-layer polymer layer and metal spiral layer with a complex structure.There are lots of contact and slip phenomena between layers.During the installation and operation of the hose,it will bear the crushing pressure of the installation machinery,the collapse pressure of the deep water and the high temperature and burst pressure inside or outside of the pipe.These loads challenge the ability of the tube to resist the radial load.Therefore,it is necessary to explore the ability of the flexible pipe to resist the radial load.This paper focuses on three kinds of radial load of hose: collapse load,burst load and crushing load.First,we classify and investigate the current research status.In the analysis of the collapse of the straight pipe,the carcass layer is only analyzed.The existing theoretical calculation methods of bending stiffness are arranged and calculated,and the different critical pressure values are compared and analyzed.At the same time,the ANSYS software is used to model and analyze the influence of the initial ellipticity and the interlayer friction coefficient on the critical collapse value.The calculation method of the critical collapse value of the elbow is derived by theoretical analysis and a numerical simulation method,whichis established to calculate the critical collapse value of the curved pipe.In the analysis of the burst and the crushing,the existing theoretical analysis and calculation methods are arranged and the results calculated by the numerical simulation method are compared with the theoretical results.In addition,the influence of the initial ellipticity defect and the friction coefficient on the response of the theoretical results is discussed by the numerical calculation method.更多还原