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在传统的桁架式Spar设计过程中,设计人员通常只选择一个或两个学科作为某个阶段的设计目标,而没有把设计过程作为一个整体进行研究.同时,传统的设计方法没有充分考虑决定Spar性能的多个学科之间的相互影响和耦合作用.因而,传统的设计方法很难获得最优的设计方案.为解决这一问题,该文将多学科设计优化方法引入桁架式Spar的概念设计,以实现真正的设计优化.文中首先介绍了桁架式Spar的传统设计方法以及多学科设计优化的基本理论,讨论了如何将多学科优化技术应用于Spar平台的概念设计.进而提出了一种适用于Spar设计的多学科设计优化方法-基于响应面的协同优化方法,并基于该方法,建立了桁架式Spar的设计优化框架.最后,对今后的研究方向提出了几点建议. 相似文献
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桁架式Spar平台方案设计研究 总被引:1,自引:0,他引:1
Spar平台是一种用于深海油气开发的海洋结构物.目前对Spar平台的研究集中在其运动特性和水动力分析、结构强度和疲劳研究以及垂荡板的性能和设计上.然而,国内对于Spar平台设计方法的研究却很少,国内外公开发表的文献也很少,这给Spar平台的设计带来了困难.本文归纳了桁架式Spar平台方案设计的基本流程,包括总布置、主尺度的选择,以及对设计方案进行的稳性校核和水动力分析.在此基础上,针对平台的不同结构推荐使用相应的ABS和API规范进行结构设计,并应用设计波法对得到的结构尺寸进行强度校核.通过一个实例详细说明了整个设计过程,分析结果表明该设计方案是可行的.同时指出了传统的海洋工程设计方法存在的问题,提出在传统设计方法的基础上,应用多学科设计优化思想进行海洋平台的方案设计的基本思想. 相似文献
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南海某深水半潜式生产平台有着超大跨距的桁架式上部组块以及带立柱储油功能的下部船体,其大跨距、超高度的典型特点给深水半潜式平台整体建造精度控制带来极大挑战。通过制定整体的精度策划方案,重点对总装搭载、立柱顶部支撑管、插尖导向等关键位置进行精度控制方法研究,对环境温度、焊接收缩等影响精度的数据进行收集、分析,进而调整优化精度控制方案,形成一整套适用于深水半潜式生产平台建造精度控制的技术方法,保证深水半潜式生产平台建造精度满足设计要求,为上部组块与下部浮体大合龙的顺利完成奠定基础。 相似文献
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我国海洋油气开发正逐步从近海浅水区域不断往远海深水区域发展。随着水深的增加,传统的以锚链为材料,以自重为回复力的悬链线式系泊系统已经不再适用。世界上超深水浮式生产平台基本上都采用张紧式系泊系统,并且中间段采用超轻的聚酯缆材料以降低其施加在平台上的荷载。基于1500米超深水的中国南海环境,开发了一种运动性能良好的新型干树半潜平台。新型平台的系泊系统采用张紧式锚链-聚酯缆-锚链形式。根据平台尺度和环境条件,对系泊系统进行了布置和设计。通过时域耦合方法对系泊系统进行了数值分析,分析结果表明系泊系统强度满足规范和设计要求。 相似文献
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The South China Sea contains tremendous oil and gas resources in deepwater areas. However, one of the keys for deepwater exploration, the investigation of deepwater floating platforms, is very inadequate. In this paper, the authors studied and compared the hydrodynamics and global motion behaviors of typical deepwater platforms in the South China Sea environment. The hydrodynamic models of three main types of floating platforms, e.g. the Semi-submersible, tension leg platform (TLP), and Truss Spar, which could potentially be utilized in the South China Sea, were established by using the 3-D potential theory. Additionally, some important considerations which significantly influence the hydrodynamics were given. The RAOs in frequency domains as well as global motions in time domains under time-varying wind, random waves, and current in 100-y, 10-y, and 1-y return period environment conditions were predicted, compared, and analyzed. The results indicate that the heave and especially the pitch motion of the TLP are favorable. The heave response of the Truss Spar is perfect and comparable with that of the TLP when the peak period of random waves is low. However, the pitch motion of Truss Spar is extraordinarily larger than that of Semi-submersible and TLP. 相似文献
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This paper studies the current available options forfloating production platforms in developing deepwater oil fieldsand the potential development models of future oil and gasexploration in the South China Sea. A detailed review of currentdeepwater platforms worldwide was performed through theexamples of industry projects, and the pros and cons of eachplatform are discussed. Four types of platforms are currently usedfor the deepwater development: tension leg platform, Spar,semi-submersible platform, and the floating production systemoffloading. Among these, the TLP and Spar can be used for dry treeapplications, and have gained popularity in recent years. The drytree application enables the extension of the drilling application forfixed platforms into floating systems, and greatly reduces the costand complexity of the subsea operation. Newly built wet treesemi-submersible production platforms for ultra deepwater are alsogetting their application, mainly due to the much needed payloadfor deepwater making the conversion of the old drillingsemi-submersible platforms impossible. These platforms have beenused in different fields around the world for different environments;each has its own advantages and disadvantages. There are manychallenges with the successful use of these floating platforms. A lotof lessons have been learned and extensive experience accumulatedthrough the many project applications. Key technologies are beingreviewed for the successful use of floating platforms for fielddevelopment, and potential future development needs are beingdiscussed. Some of the technologies and experience of platformapplications can be well used for the development of the SouthChina Sea oil and gas field. 相似文献
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动力定位系统在船舶和海洋工程有着大量的应用,特别是在深水石油开发钻井平台中成为必备的关键设备。海洋钻井平台在钻井作业过程中要求其不受海洋气象环境的影响,保持在一个相对确定的海面位置上。早期浅水浮式钻井平台采用锚定位的方式可以胜任该项作业要求,但随着水深的增加,特别在大于1000米水深时,从技术和经济角度考虑已不能适应实际的需要。本文集中介绍动力定位系统的组成和系统配置,为以后的动力定位系统设计起到一定的借鉴作用。 相似文献
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浮式生产储卸油系统(FPSO)是一种经济有效的浮式平台方案,特别是在缺乏足够的输油管道系统的深海领域.大多数FPSO是永久系泊的,即整个系统能够抵抗工作海域内的各种极值环境条件.目前,能够将FPSO与其系泊及立管系统快速解脱的装置已经设计并发展了.可解脱式FPSO的主要特点是可解脱性,并能避免一定的环境条件,如冰山,美国摩西哥湾的飓风,中国南海的台风.本文将针对深水海域可解脱式FPSO,提出其主要技术和工程分析与设计思路,评估可解脱式FPSO与永久式FPSO的优缺点,等等.可见町解脱式FPSO与永久式FPSO都是十分有效的浮式系统,并根据平台设计的安全性、技术、成本和运行要求,来决定选择何种系泊方式. 相似文献
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钻探极地地区近海石油和天然气资源对移动式离岸钻井平台的水动力性能、抗冰性能和作业性能有着极大的要求。本文主要介绍了浮式抗冰平台的设计方案,并结合当今最新一款半潜式抗冰平台的设计理念,分别从频域和时域分析的角度与传统的半潜式平台作对比,分析得出其具有优越的水动力性能,垂荡、横摇、纵摇运动响应都优于传统的半潜平台,为下一步抗冰性能分析及其关键技术的研究做基础,同时也给半潜式平台带来新的设计理念,为浮式抗冰平台的设计建造提供合理思路。 相似文献
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This work describes an enhanced mooring optimization procedure, oriented towards recent floating production systems (FPS) for oil & gas exploitation in ultra-deep-water scenarios, which may present a large number of risers in an asymmetric layout. Acknowledging that the risers are the key component of an FPS, the optimization procedure is associated to an integrated mooring-riser design methodology; thus, instead of simply minimizing the platform offsets and/or the costs of the mooring system itself, one of the main objectives is to obtain a mooring configuration that ensures the integrity of the risers. Other highlights of the optimization procedure include the following aspects: Enhancements in the modeling of the optimization problem (including the definition of design variables, objective function and constraints that are relevant for such actual applications); The use of the PSO optimization algorithm associated to the ε-constrained method to efficiently handle the constraints; Enhancements in the evaluation of candidate solutions, by full nonlinear time-domain dynamic Finite Element simulations with coupled models; and the implementation in a parallel computing environment to deal with the high associated computational costs. A case study considering an FPS representative of actual applications in deepwater scenarios is presented to illustrate the practical application of the optimization tool. 相似文献