共查询到18条相似文献,搜索用时 234 毫秒
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模块支墩结构是上部模块与FPSO船体主甲板之间的连接结构,在模块支墩结构设计中除考虑上部模块自重、惯性力及风载等载荷,还应注意船体梁整体弯曲变形的影响,故在设计最初就应考虑支墩结构疲劳强度.该文通过对FPSO上部模块支墩结构的疲劳评估,基于线性疲劳累积损伤原理的简化疲劳评估方法,展开疲劳分析,并考虑了FPSO服役寿命周期内的各种工况,在此过程中借助有限元分析软件成功获得了疲劳评估中的重要数据.分析支墩结构疲劳损坏的危险区域及疲劳产生的主要诱因,分析结果可为后续支墩结构的详细节点设计提供借鉴. 相似文献
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《上海造船》2015,31(6):56-61
作为FPSO(浮式生产储油卸油装置)主船体和上部模块的连接结构,模块支墩结构是主船体和上部模块的安装界面,又是承受上部模块重量的重要支撑结构,主船体和上部模块的建造会分别在模块支墩界面处产生累计建造误差,建造误差会对模块支墩的强度和疲劳寿命产生显著影响。由于模块支墩结构的特殊性,普通的船舶结构建造精度标准不再适用于FPSO模块支墩结构,依托于一型新建FPSO模块支墩结构,对模块支墩的建造精度控制进行了专门研究。简要介绍了FPSO模块支墩结构概况,探查模块支墩结构建造误差的来源,分析了建造误差对结构强度及疲劳寿命的影响,根据误差种类分别提出了避免建造误差的方法和修正办法。研究成果可为FPSO模块支墩的建造和安装提供参考。 相似文献
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依据不同的功能要求,浮式生产卸货装置(FPSO)的主甲板上设置多个工艺模块平台,每一个模块架构平台与FPSO主船体的连接结构——模块支墩,是FPSO结构设计的关键技术,其可靠性和实用性将直接影响FPSO生产流程的正常运转。结合近20多年来对FPSO的设计经验,提出了模块支墩设计的不同理念及结构设计特点,并对多型FPSO的模块支墩分析对比其形式特点、适用性及优缺点,同时从工程设计经验角度,阐述了模块支墩的结构设计原则和结构强度的分析计算及算例。所提供的设计原则及相应的经验可供相关设计人员借鉴。 相似文献
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恶劣海况下FPSO模块支墩结构分析 总被引:1,自引:0,他引:1
大型或超大型FPSO由于船体尺度大,各种模块重心高度亦高,在风、浪、流共同作用下,加上船体梁变形的影响,模块支撑根部的应力更高,所以传统的刚架型模块支撑形式不适用于环境条件恶劣的FPSO。本文以MARIC设计的在强台风海域服务、永不解脱、内转塔式15万吨级“南海奋进”号和“海上石油111”号FPSO为例,研究了船体梁变形值,考虑在风、浪、流和液货共同作用下的模块支墩结构的分析比较,综合分析消防、管线布置和安全通道的要求,提出了适合于恶劣海况、能够抵御百年一遇台风的新型模块支墩结构形式。 相似文献
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FPSO模块支墩焊接接头低温CTOD韧度试验研究 总被引:4,自引:0,他引:4
模块支墩是海上浮式生产储油船(FPSO)中连接上部模块与主甲板的关键结构,必须有效保证其焊接接头的韧度以防裂防断。按照国际通用规范BS7448和DNV-OS-C401的要求,对我国渤海PL19-3油田300ktFPSO的模块支墩焊缝和熔合区进行了低温(-18℃)裂纹尖端张开位移(CTOD)的试验研究。试验研究结果表明:按拟用焊接工艺所焊接的模块支墩焊接接头,其焊缝和熔合区的CTOD试验值都能满足国际通用规范DNV-OS-C401规定的要求(不小于0.15mm),因此,可以确认,该焊接工艺可应用于模块支墩的焊接施工,并且焊后的模块支墩可以免除退火处理。 相似文献
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《Marine Structures》2005,18(1):1-24
As an early part of a large design and fabrication-oriented project FasdHTS funded by the GROWTH programme of the European Commission, an exotic concept ship was designed in very high tensile steel (EHS690) with the purpose of finding out consequences for design and production. The project has already produced a considerable bank of knowledge for design and shipyard production in this material.This paper presents analysis and discussions on static and dynamic behaviour of a high tensile steel deck designed with trapezoidal stiffeners. First, a finite element model of the deck structure is created. The influence of support condition for the longitudinal girders, and the contact area between the vehicle tyre and panel were analysed. The results from modal analysis of the structure under different load conditions are presented. The different load conditions comprise the unloaded and loaded deck, and the load type, i.e. cargo loads or vehicle loads (car loads or truck loads). From the frequency response analysis under harmonic excitation, it shows how the locations and numbers of cars parked on the deck influence the dynamic response of the structure. Furthermore, by studying the car–deck interaction, it is found that the effects of normal cargo loads are quite different from the vehicle loads due to the spring/damping effects of the vehicles. It is suggested that the carloads have a similar mechanism to that of tuned mass dampers. Finally, two transient analyses of the structure due to excitations transferred from deck supports and lorry braking-induced loading are performed. It is suggested that the deck structure and vehicle design could have more interactions with each other. 相似文献
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In the design phase of a 4900 PCTC (Pure Car/Truck Carrier) with hinged deck design, fatigue behavior and fatigue life is investigated for various structural details. The global finite element analysis shows high local stress concentrations at the connections of various details. In this article, the detailed analysis of the investigation of fatigue analysis and fatigue life of the connection between the vertical side web and the main deck (deck 5) of the entire vessel is performed according to Det Norske Veritas (DNV) Rules. In order to achieve more accurate results, three types of finite element analysis (global finite element model, fine-mesh finite element model and stress concentration models) are hierarchically used. The investigation for finite element analysis for fatigue analysis is based on the approach using hot spot stresses. 相似文献
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钢一混凝土组合桥面板是通过剪力连接件将混凝土和钢梁结合在一起的一种新型组合结构。以某一特大跨度悬索桥钢一混凝土组合桥面板为例,介绍了钢一混凝土桥面板设计的基本方法,并进行了有限元计算,结果表明设计满足规范要求。 相似文献