摘要半潜式海洋平台，作为浮式海洋平台的常见类型之一，有着较好的抗风浪性、优良的运动性和稳定性、巨大的甲板面积、装载容量和高效的作业率，海上装配的便捷性，全天候作业性和极强的自存性，具有其他平台无法比拟的优势，本文从半潜平台结构特点出发，对某型半潜平台的结构节点进行选型设计，在此基础上绘制结构节点图册，并基于该型半潜平台的主尺度信息和结构受载情况，建立半潜平台下浮体结构的有限元模型，模拟结构荷载并分析探求结构的受力，校核结构屈服强度并分析结构变形量，主要研究内容如下：81906

（1）参照国标《船体结构相贯切口与补板》，《船体结构型材端部形状》和《船体结构流水孔、透气孔、通焊孔》，并依据DNV船级社的OS-C101/102/103规范和IACS船级社规范，研究半潜式海洋平台的结构特点，并对某型半潜平台的结构节点进行选型设计，其结构节点形式包括各种板材、型材的对接、搭接、角接和相交的连接形式，各种型材端部面板和腹板的切斜形式，船体结构相贯切口与补板的选取形式，船体结构开流水孔、透气孔和通焊孔等形式。

（2）在对某型双下体半潜平台结构节点的选型设计基础上，根据结构节点标准图册的要求绘制出该型半潜平台的结构节点标准图册。

（3）建立该型半潜平台下浮体结构的有限元模型，根据挪威船级社DNV-OS-C101规范模拟荷载并加载分析结构的应力，校核结构屈服强度，分析下浮体结构的变形量。

毕业论文关键词：结构节点；结构节点图册；SESAM(GeniE)；半潜平台；结构有限元模型

Abstract  Generally，as a type of floating offshore platforms, semi-submersible platform has a good resistance to wind and waves beyond excellent mobility and stability。 It owns large deck area, loading ability and operation efficiency。 It’s also convenient when installed at sea with the addition of all-weather working and survival ability。 In conclusion, semi-submersible platform has incomparable advantages over other offshore platforms。 On the basis of its structural features the type selection design of a semi-submersible platform structural joints was processed。 Structural joint atlas was drawn。 According as the principal dimensions and load conditions of this platform, finite element model of a quarter pontoon was established and the load case is simulated。 The structure stress was analyzed and yield strength was checked。 The main research contents are as follows: 

    (1) According as Chinese standard such as “Slot and Collar Plate of Hull Structure”, “End Connection of Hull Structure Members” and “Scallop, Air Hole and Drain Hole of Members”。 In this article DNV-OS-C101/102/103 rules and IACS rules were referred to。 Structural features of such type of platform were studied。 Then type selection design of the semi-submersible platform structural joints was processed。 These structural joints included various end connections of members such as docking, lapping, corner or crossing joints。 

    (2) On the basis of above jobs with the addition of structural joint atlas standard,  the joint atlas of this platform was drawn。 

    (3) Then finite element model of pontoon was established。 According to DNV-OS-C101 and CCS rules, the load case was simulated and the structure stress was analyzed。 Finally the yield strength was checked and the displacement in all direction of pontoon was analyzed。 

Keywords：structural joint；structural joint atlas；SESAM(GeniE)；semi-submersible platform；finite element mode

目  录

第一章 绪论1

1。1 研究背景和意义1