深海平台复合单系泊缆形状和张力分析

以一工作水深为310 m的转塔式浮式生产存储系统为例研究了复合单系泊缆索静力特性的计算方法,用C++编写了基于悬链线方程式的深海平台系泊缆形状和张力的分析计算程序,计算并分析了复合单缆在无浮筒重物、只有浮筒、只有重物、既有浮筒又有重物四种情况下的形状和张力,为动力计算提供条件。本方法简单直观,并且完成一次计算所耗时间不到1 s,特别适合于需要多次迭代计算复杂系泊系统静力特性的等效水深截断系统优化设计。     

基于INSGA-Ⅱ的等效水深截断系统优化设计(英文)

At present,equivalent water depth truncated mooring system optimization design is regarded as the priority of hybrid model testing for deep sea platforms,and will replace the full depth system test in the future.Compared with the full depth system,the working depth and span are smaller in the truncated one,and the other characteristics maintain more consistency as well.In this paper,an inner turret moored floating production storage & offloading system(FPSO) which works at a water depth of 320m,was selected to be a research example while the truncated water depth was 80m.Furthermore,an improved non-dominated sorting genetic algorithm(INSGA-II) was selected to optimally calculate the equivalent water depth truncated system,considering the stress condition of the total mooring system in both the horizontal and vertical directions,as well as the static characteristic similarity of the representative single mooring line.The results of numerical calculations indicate that the mathematical model is feasible,and the optimization method is fast and effective.     

新建半潜运输船在张力腿平台运输方面的应用研究(英文)

Transportation of tension leg platform(TLP) structures for a long distance has always been associated with the use of a heavy semi-transport vessel.The requirements of this type of vessel are always special,and their availability is limited.To prepare for the future development of South China Sea deepwater projects,the China Offshore Oil Engineering Corporation has recently built a heavy lift transport vessel-Hai Yang Shi You 278.This semi-submersible vessel has a displacement capacity of 50k DWT,and a breath of 42 meters.Understanding the vessel’s applicability and preparing it for use in future deepwater projects are becoming imminent needs.This paper reviews the current critical issues associated with TLP transportation and performs detailed analysis of the designed TLP during load-out and transportation.The newly built COOEC transportation vessel HYSY 278 was applied to dry transport of the TLP structure from the COOEC fabrication yard in Qingdao to an oil field in South China Sea.The entire process included the load-out of the TLP structure from the landsite of the fabrication yard,the offloading and float-on of the platform from the vessel,the dry transport of the TLP over a long distance,and the final offloading of the platform.Both hydrodynamic and structure analysis were performed to evaluate the behavior of the transport vessel and TLP structure.Special attention was paid to critical areas associated with the use of this new vessel,along with any potential limitations.The results demonstrate that HYSY 278 can effectively be used for transporting the structure with proper arrangement and well-prepared operation.The procedure and details were presented on the basis of the study results.Special attention was also given to discussion on future use based on the results from the analysis.     

半潜式钻井平台横撑截面形状的优化

海洋油气资源开发离不开半潜式钻井平台.因油田内短距离拖航需要,半潜式钻井平台可能遇到深吃水拖航工况,此时平台整体吃水较大,浮箱、部分立柱及横撑整体将位于水面以下并引起拖航阻力,其中横撑的阻力贡献占总阻力的25％左右.当横撑的长度及间距已经确定时,其拖航阻力主要受截面形状的影响.本文采用Fluent对一座实际平台的横撑拖航阻力进行研究,得到截面倒角对横撑阻力的影响规律,获得了截面倒角的最佳取值范围.结果表明,截面倒角半径大于0.3m时,横撑拖航阻力系数可以比不做倒角时减小60％以上,本文研究结果将为今后的半潜式钻井平台船型设计提供参考.     

视景仿真的屏蔽门系统在地铁列控系统中的应用

研究了一种基于视景仿真的虚拟测试方法,并将其应用于地铁列车CBTC系统的仿真测试平台中,利用Multigen Creator及Vega软件构建车站、站台屏蔽门及列车的虚拟现实环境,在实验室模拟了地铁站台屏蔽门的工作,解决了CBTC系统开发工作对现场环境依赖过高的问题．     

一种超深水半潜式钻井平台钻井系统总体设计和布置方案

超深水半潜式钻井平台是深水海洋油气资源开发的重要装备。本文总结第七代超深水半潜式钻井平台参数需求,结合钻井系统总体布置要求,总体分析钻井各核心子系统的布置,最终形成一套超深水钻井系统总体布置方案,为超深水钻井平台钻井系统的工程设计提供参考。     

半潜起重拆解平台总布置设计方法

文章总结了拆解平台总布置设计的基本原则,围绕平台起重和居住功能,对起重、动力和居住、压载以及定位等系统的布置进行规划设计,提出一种半潜起重拆解平台总布置关键技术的设计方法,该方法以平台主要功能实现为基础,对总体功能区域进行划分,在满足最新规范的要求下,对平台关键系统进行优化设计,为后续项目积累经验和借鉴方案。     

起重船助浮大型圆沉箱半潜驳出运工艺

以大连港鲶鱼湾港区30万吨级码头工程为实例,详细分析了半潜驳下潜区水深不满足沉箱浮游稳定要求的问题解决方法,并与营口港30万吨级原油码头工程中的解决方法进行对比。实际施工结果表明,起重船助浮大型沉箱半潜驳出运工艺是切实可行的。该方法进一步完善了原有半潜驳出运沉箱工艺的不足,扩展了半潜驳出运沉箱工艺应用范围。     

超大型沉箱外海溜放与安装

码头的建设规模越来越大,沉箱向超大型发展,沉箱溜放和安装需起重船辅助.以青岛港董家口港区40万t矿石码头为例,介绍6000t超大型沉箱的溜放与安装.该工程的成功实践,为超大型沉箱的移运和安装提供了借鉴.     

基于蒙特卡洛模拟的半潜式平台极限强度可靠性研究

半潜式平台是世界深海钻井的主要装备。我国南海的平均水深较深,油气资源丰富,自主掌握半潜式平台设计建造技术势在必行。结构的极限强度是半潜式平台所能承受载荷的上限值,充分考虑极限强度计算中的不确定性,并对其极限强度进行评估对于结构的安全而言具有重要意义。采用Smith法计算半潜式平台极限强度,用蒙特卡洛模拟对半潜平台极限强度计算中的不确定变量进行离散,然后将离散后的均匀随机数代入Smith法中,通过大量的循环计算得到半潜平台极限强度的概率密度曲线。通过与半潜平台极限强度名义值进行比较,发现变量的不确定性对半潜式平台极限强度影响较大,名义值不能真实地反映半潜式平台的承载能力。