海洋非粘接柔性管接头密封系统分析与设计
发布时间：2019-05-19 19:26
【摘要】：接头是非粘接柔性管的必要附件,主要功能是实现管道与终端的连接和密封。其中密封系统决定了管道的工作压力和应用水深。典型的接头密封系统都是利用接触压力效应实现的。当前我国的非粘接柔性管研究刚刚起步,接头的密封性能与国际主流水平相差较大,这严重制约了国产管道的应用。本文首先介绍了非粘接柔性管道及其接头的结构特点,以及当前接头密封系统的应用和研究现状,阐明了本文研究的意义。然后介绍了工程中常见的密封问题,重点介绍了其中的静密封原理和方法,并且总结了依靠接触压力效应实现密封的分析方法,阐述了密封准则的选取方法,并提出了一种易用的密封准则。介绍了赫兹接触理论,并基于一种弹塑性变形修正理论建立了分析圆柱与弹塑性半空间的接触计算程序。接着利用理论和数值的方法分析了接触面上的锯齿这类典型结构的密封性能,给出了不同锯齿截面以及不同材料对密封性能的影响。结论是圆截面锯齿的密封性能较优,以及高杨氏模量和高屈服极限的材料密封性能更好。接着提出了锯齿的接触压力放大倍数,该参数可简化带锯齿密封结构的分析。再利用已有的接触压力计算方法、锯齿放大倍数和密封准则设计了用于非粘接管道接头的密封环,并用数值方法进行了相关参数的敏感性分析、密封检测以及自紧性能分析。最后设计并实施了接头内密封系统的验证性实验。结合提出的通过条件,分析实验数据后得到了实验结论,即接头内密封系统通过了实验验证,达到了服役条件。本文的研究工作依托国家高技术研究发展计划(863计划)—深水油气勘探开发关键技术与装备研究项目“柔性海底管道关键技术研究”(2012AA09A212)课题开展。该工作对国内柔性管接头密封系统的分析和设计具有指导意义。
[Abstract]:The joint is not attached to the flexible pipe, and the main function is to connect and seal the pipe and the terminal. The sealing system determines the working pressure and applied water depth of the pipeline. The typical joint sealing system is realized by contact pressure effect. At present, the research of non-bonded flexible pipe in our country has just started, and the sealing performance of the joint is quite different from that of the international mainstream level, which seriously restricts the application of domestic pipeline. In this paper, the structural characteristics of non-bonded flexible pipes and their joints, as well as the application and research status of joint sealing system are introduced, and the significance of this study is expounded. Then the common sealing problems in engineering are introduced, with emphasis on the principle and method of static sealing, and the analysis method of realizing sealing by contact pressure effect is summarized, and the selection method of sealing criterion is expounded. An easy-to-use sealing criterion is proposed. The Hertz contact theory is introduced, and a contact calculation program for analyzing cylinder and elastic-plastic half space is established based on an elastic-plastic deformation correction theory. Then the sealing performance of typical structures such as sawtooth on the contact surface is analyzed by theoretical and numerical methods, and the effects of different sawtooth sections and different materials on the sealing performance are given. The conclusion is that the sealing performance of circular section sawtooth is better, and the sealing performance of materials with high Young's modulus and high yield limit is better. Then the contact pressure magnification of sawtooth is put forward, which can simplify the analysis of sawtooth seal structure. Then the sealing ring for non-bonded pipe joint is designed by using the existing contact pressure calculation methods, sawtooth magnification and sealing criteria, and the sensitivity analysis, sealing detection and self-tightening performance analysis of related parameters are carried out by numerical method. Finally, the verification experiment of the joint internal sealing system is designed and carried out. Combined with the proposed conditions, the experimental results are obtained after analyzing the experimental data, that is, the sealing system in the joint has passed the experimental verification and reached the service conditions. The research work of this paper is based on the National High Technology Research and Development Plan (2012AA09A212), the key technology and equipment research project of deep water oil and gas exploration and development, "Research on key Technologies of flexible Submarine Pipeline". This work is of guiding significance for the analysis and design of flexible pipe joint sealing system in China.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P756.2
本文编号：2481003
[Abstract]:The joint is not attached to the flexible pipe, and the main function is to connect and seal the pipe and the terminal. The sealing system determines the working pressure and applied water depth of the pipeline. The typical joint sealing system is realized by contact pressure effect. At present, the research of non-bonded flexible pipe in our country has just started, and the sealing performance of the joint is quite different from that of the international mainstream level, which seriously restricts the application of domestic pipeline. In this paper, the structural characteristics of non-bonded flexible pipes and their joints, as well as the application and research status of joint sealing system are introduced, and the significance of this study is expounded. Then the common sealing problems in engineering are introduced, with emphasis on the principle and method of static sealing, and the analysis method of realizing sealing by contact pressure effect is summarized, and the selection method of sealing criterion is expounded. An easy-to-use sealing criterion is proposed. The Hertz contact theory is introduced, and a contact calculation program for analyzing cylinder and elastic-plastic half space is established based on an elastic-plastic deformation correction theory. Then the sealing performance of typical structures such as sawtooth on the contact surface is analyzed by theoretical and numerical methods, and the effects of different sawtooth sections and different materials on the sealing performance are given. The conclusion is that the sealing performance of circular section sawtooth is better, and the sealing performance of materials with high Young's modulus and high yield limit is better. Then the contact pressure magnification of sawtooth is put forward, which can simplify the analysis of sawtooth seal structure. Then the sealing ring for non-bonded pipe joint is designed by using the existing contact pressure calculation methods, sawtooth magnification and sealing criteria, and the sensitivity analysis, sealing detection and self-tightening performance analysis of related parameters are carried out by numerical method. Finally, the verification experiment of the joint internal sealing system is designed and carried out. Combined with the proposed conditions, the experimental results are obtained after analyzing the experimental data, that is, the sealing system in the joint has passed the experimental verification and reached the service conditions. The research work of this paper is based on the National High Technology Research and Development Plan (2012AA09A212), the key technology and equipment research project of deep water oil and gas exploration and development, "Research on key Technologies of flexible Submarine Pipeline". This work is of guiding significance for the analysis and design of flexible pipe joint sealing system in China.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P756.2
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