钢悬链线立管触地区管土作用研究

发布时间：2018-05-31 06:46

  本文选题：钢悬链线立管 + 管土作用　； 参考：《浙江海洋学院》2015年硕士论文

【摘要】：随着全球经济的高速发展,对石油天然等化石能源的需求每年成几何倍数增长,陆地和近海油气的开采已经不能满足日益增长的生产和生活需求。近年来,海洋油气开采技术迅速革新,海洋油气开采逐步走向深水(水深500m-1500m)、超深水(水深大于1500m)领域。钢悬链线立管(SCR)作为深水油气开发的一种立管选择,有着良好的环境适应性且成本较低。典型的SCR大致由悬垂段、触地段、流线段组成。由于上部结构物的运动和海洋环境载荷的影响,立管触地点不断发生运动,与海床反复作用,容易造成立管触地区的疲劳破坏。触地区管土作用机理与该区域疲劳分析一直是工程界的一个热点问题。本文首先总结介绍了近年来国内外SCR管土作用数值分析和试验研究的进展和所取得的成果以及存在的不足之处。分析了立管所处海况环境,介绍了波浪、流等海洋载荷对立管以及上部浮体的作用情况,详细阐述了不同荷载的计算方法;使用ABAQUS与OrcaFlex通过模拟安装过程的方法得到立管初始静态安装形态,并与通过传统悬链线理论计算得到的形态进行对比,分析各种方法的准确性;通过海工专用软件对立管进行简单的动态分析,得出立管的易疲劳区域;然后介绍了管土作用的数值模型,对各个参数进行介绍,以此为基础,对立管进行整体动态分析,分析不同参数,如海床土强度、立管上部浮体所处海况波高等因素对立管贯入海床的深度、贯入最深节点的位移时程、立管沿长度方向的弯矩、应力等的影响;最后,设计两套简单易行的管土作用试验装置,进行小尺寸模型试验,更加直观的观察管土作用。第一套设备对立管进行整体动态研究,通过OrcaFlex软件对试验结果进行验证,证明试验设备的准确性。第二套设备对立管触地区进行局部分析,分析不同运动形态,运动周期等对立管触地区应力的影响。
[Abstract]:With the rapid development of the global economy, the demand for fossil fuels such as oil and gas is increasing every year. The exploitation of land and offshore oil and gas can not meet the growing demand for production and life. In recent years, marine oil and gas mining technology has been rapidly innovating, and marine oil and gas mining has gradually moved into deep water (500m-1500m), and ultra deep water (deep water). Water depth is more than 1500m). Steel catenary riser (SCR), as a riser selection for deepwater oil and gas development, has good environmental adaptability and low cost. Typical SCR consists of draping section, touchdown section, and flow line section. The position of the riser is constantly moving and with the sea because of the movement of the superstructure and the load of the marine environment. The repeated action of the bed can easily cause the fatigue damage of the riser contact area. The action mechanism of the pipe and soil in contact with the region and the fatigue analysis of the region have been a hot issue in the engineering field. This paper first summarizes the progress of the numerical analysis and Experimental Research on the SCR tube and soil action at home and abroad in recent years and the achievements and shortcomings. This paper analyzes the sea condition environment in the riser, introduces the action of wave, flow and other marine load opposing tube and upper floating body, and expounds the calculation method of different loads in detail. Using ABAQUS and OrcaFlex through the simulation of installation process, the initial static installation of the riser is obtained, and the form obtained by the traditional catenary theory is calculated. Comparison and analysis of the accuracy of various methods; through the simple dynamic analysis of the antithesis pipe of the special software of the sea workers, the easy fatigue area of the riser is obtained. Then the numerical model of the pipe soil is introduced, and the various parameters are introduced. On this basis, the dynamic analysis of the whole body is carried out and the different parameters, such as the strength of the sea bed soil, are analyzed. The upper floating body is in the depth of the sea condition wave, which penetrates the depth of the sea bed, penetrates the displacement time of the deepest node, the bending moment of the vertical pipe along the length direction, and the stress, etc. Finally, the two sets of simple and easy tube soil test equipment are designed, and the small size model test is carried out to observe the effect of the pipe and soil more intuitively. The first set of equipment is antagonistic. The whole dynamic study of the tube was carried out. The test results were verified by OrcaFlex software, and the accuracy of the test equipment was proved. The local analysis of the second sets of antagonistic tube contact area was carried out to analyze the influence of the different movement forms and the movement cycle on the stress of the area.
【学位授予单位】：浙江海洋学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95;P756.2
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本文编号：1958699