自升式海洋钻探平台开发设计研究

发布时间：2018-06-16 09:27

本文选题：自升式钻探平台 + 总布置　；参考：《大连海洋大学》2015年硕士论文

【摘要】：论文研究工作是基于浮体静力学、波浪理论、结构有限元分析方法,研究了自升式海洋钻探平台设计方法、设计开发了一种用于近海和沿岸工程勘探的新型、多功能、高效作业平台,为近海和沿岸能源开发、地质勘探、地基基础工程提供了专业工程装备。论文研究内容是自升式钻探平台开发设计研究,它综合考虑了360度风浪流载荷作用,探索开发了新型海洋工程装备、突破设计主要技术,为可移动的自升式钻探平台结构优化提供科学依据。论文主要研究内容如下:(1)查阅了自升式海洋平台装备开发研究进展,梳理了相关设计与建造技术的主要问题,将可移动的自升式海洋平台的主要尺度要素与总体布置设计、漂浮拖航稳性、设计工况及载荷、平台结构强度分析等方面作为主要技术进行研究,构建了适用于近海与沿岸使用的自升式海洋平台装备开发的设计软件平台系统。(2)根据设计需求和海洋平台设计规范,确定了自升式海洋钻探平台的主要尺度,对平台的整体布局和空间划分进行了规划设计,给出了桩腿及固桩区、悬臂梁、吊机基座等主要结构布局,确定平台总体布置形式及总布置图,为后续的设计开发及主要技术研究提供基础。(3)基于五阶斯托克斯波浪理论,编程计算了平台桩腿波浪载荷,使波浪载荷分析更加精确;依据设计规范进行各工况下的风和海流载荷计算;在舱容计算及空间布置基础上,计算迁航及站立工况的重量与重心,提高平台的可变载荷。各工况的载荷计算和归类整理,为后续平台稳性校核和结构强度分析提供计算输入和边界条件。(4)针对移动、自升式平台特点,考虑了自由纵倾状态的大倾角横稳性计算、破舱稳性计算和极限重心高度曲线计算,使计算模型比固定纵倾的传统计算模型更加符合实际浮态,提高了平台拖航稳性计算精度和拖航安全性。考虑360度风浪流载荷作用,计算了最危险载荷作用方向下的站立稳性,更加全面分析了平台的站立稳定性及安全性。(5)考虑到桩腿、固桩区和吊机基座结构是自升式平台的主要结构,在载荷计算的基础上,对平台结构进行整体结构有限元建模,计算网格划分,以及受力加载分析,分析了平台结构的整体强度和局部强度,在满足规范设计约束条件下,为平台结构基本设计提供计算分析依据,使得平台设计更加合理、安全。
[Abstract]:Based on floating body statics, wave theory and structural finite element analysis method, the design method of jack-up offshore drilling platform is studied in this paper. A new type and multifunction for offshore and coastal engineering exploration is designed and developed. High-efficient platform for offshore and coastal energy development, geological exploration, foundation engineering provides professional engineering equipment. The research content of this paper is the development and design of the jack-up drilling platform, which comprehensively considers the effect of 360 degrees wind, wave and current load, explores and develops new marine engineering equipment, and breaks through the main design technology. It provides scientific basis for structure optimization of movable jack-up drilling platform. The main contents of this paper are as follows: (1) reviewing the research progress of the equipment development of the jack-up offshore platform, combing the main problems of the related design and construction technology, the main scale elements and the general layout design of the movable jack-up offshore platform. Floating towing stability, design conditions and loads, platform structure strength analysis and other aspects as the main technology, The design software platform system of jack-up offshore platform equipment development suitable for offshore and coastal use is constructed. According to the design requirements and the design specifications of offshore platform, the main scale of jack-up offshore drilling platform is determined. The overall layout and space division of the platform are planned and designed, and the main structural layout of the pile leg and fixed pile area, cantilever beam, crane base and so on are given, and the general layout and layout of the platform are determined. Based on the five-order Stokes wave theory, the wave loads of the platform pile leg are programmed and calculated, which makes the wave load analysis more accurate. On the basis of the calculation of cabin capacity and space arrangement, the weight and center of gravity of the moving and standing conditions are calculated, and the variable load of the platform is improved. According to the characteristics of moving and bootstrapping platform, the calculation of large inclination angle and lateral stability is considered in view of the characteristics of moving and bootstrapping platform, which provides the calculation input and boundary condition for the subsequent platform stability check and structural strength analysis, according to the characteristics of moving and bootstrapping platform, and takes into account the calculation of large inclination angle and horizontal stability in the state of free pitching. The calculation of damage stability and the limit gravity center height curve make the calculation model more accord with the actual floating state than the traditional calculation model of fixed trim, and improve the accuracy and safety of the platform towing stability calculation. The standing stability in the direction of the most dangerous load is calculated, and the standing stability and safety of the platform are analyzed comprehensively. The fixed pile area and the base structure of the crane are the main structures of the jack-up platform. On the basis of the load calculation, the finite element model of the whole structure of the platform is built, the grid is calculated, and the load is analyzed. The overall strength and local strength of the platform structure are analyzed, and the calculation and analysis basis for the basic design of the platform structure is provided under the constraint condition of the standard design, which makes the platform design more reasonable and safe.
【学位授予单位】：大连海洋大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P756.5

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