深海FPSO关键管路应力分析

发布时间：2018-01-06 18:11

本文关键词：深海FPSO关键管路应力分析　出处：《江苏科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：海上浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)以其机动性和移动性好、具有适应深海采油的能力、在深海区域中有较大的抗风浪能力、以及大产量的油气水生产处理能力和大的原油存储能力等优点,成为海洋工程装备中面向深海油气田开发的主流手段。管路系统的正常运行对船舶、人员和设备的安全有着至关重要的作用,恶劣的海上作业环境和油气生产的高危险性也对FPSO管道系统的安全提出了更高的要求。因此,对深海FPSO管道系统进行应力分析显得非常的必要。本文以一工作于南海海域的30万吨的FPSO关键管路系统为研究对象,探讨了风载、波浪载荷以及船体变形等各种载荷对管道应力的影响,对FPSO压载水系统、主机排烟管系统、甲板货油管系统进行了静力分析,开展了一次应力和二次应力的校核;并在静力分析的基础上,研究了水锤载荷和设备振动对管道应力的影响。本文的具体研究内容如下:1、以FPSO某发电机排烟系统为例讨论了组合工况法和独立载荷法两种方法设计的工况的对管道应力、约束载荷以及位移大小的影响,进而分析两种方法各自的优点以及应用范围。2、根据确定的分析工况,对FPSO主机排烟系统、甲板货油管系统进行一次应力和二次应力的校核和分析。对FPSO主机排烟系统进行静力分析时,主要考虑温度载荷对管道应力的影响;对FPSO甲板货油管系统进行静力分析时,考虑风载以及船体变形对管道应力的影响,并分析船体变形荷载交变作用对管道的疲劳破坏。3、以FPSO压载水系统为研究对象,利用CAESARII软件的动态分析模块,分析了压载水系统遭受水锤载荷作用时管道应力的变化,并对应力超过规范要求的管道进行相关约束的调整,保证压载系统的安全运行。4、管道系统在单泵振动和多泵组合振动情况下,选取振动良好和振动危险两种等级下的振动烈度为激励载荷,研究管道最大应力随转速的变化情况,并对计算结果进行对比分析。
[Abstract]:Floating Production Storage and Offloading. Because of its good mobility and mobility, FPSO has the ability to adapt to the deep-sea oil recovery, and has a great ability to resist wind and waves in the deep-sea area. As well as the advantages of large oil, gas and water production processing capacity and large crude oil storage capacity, it has become the mainstream means for deep-sea oil and gas field development in marine engineering equipment. The normal operation of pipeline system is of great importance to the ship. The safety of personnel and equipment plays an important role. The harsh offshore working environment and the high risk of oil and gas production also put forward higher requirements for the safety of FPSO pipeline system. It is very necessary to analyze the stress of deep-sea FPSO pipeline system. In this paper, a 300,000 ton FPSO pipeline system working in the South China Sea is taken as the research object, and the wind load is discussed. The influence of wave load and hull deformation on the stress of pipeline is analyzed. The static analysis of FPSO ballast water system, main engine exhaust pipe system and deck cargo tubing system is carried out. The check of primary stress and secondary stress is carried out. On the basis of static analysis, the influence of water hammer load and equipment vibration on pipeline stress is studied. The specific contents of this paper are as follows: 1. Taking the exhaust system of a generator in FPSO as an example, the effects of combined working condition and independent load on the stress, constraint load and displacement of pipeline are discussed. Then the advantages of the two methods and the scope of application. 2. According to the determined analysis conditions, the FPSO main engine smoke exhaust system. The primary stress and secondary stress are checked and analyzed in the deck cargo tubing system. The influence of temperature load on pipeline stress is mainly considered in the static analysis of FPSO exhaust system. In the static analysis of FPSO deck cargo tubing system, the influence of wind load and hull deformation on pipeline stress is considered, and the fatigue failure of pipeline caused by ship hull deformation load alternation is analyzed. Taking the FPSO ballast water system as the research object, using the dynamic analysis module of the CAESARII software, the variation of the pipeline stress when the ballast water system is subjected to the water hammer load is analyzed. And the stress in excess of the requirements of the requirements of the relevant constraints of the pipe adjustment to ensure the safe operation of ballast system. 4, the pipeline system in the case of single pump vibration and multi-pump combination vibration. The vibration intensity of good vibration and vibration danger is selected as excitation load to study the variation of maximum stress with rotational speed and to compare and analyze the calculated results.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE952

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