共查询到19条相似文献,搜索用时 52 毫秒
1.
2.
3.
4.
5.
6.
7.
文章首先采用三维频域理论分析西非海域FPSO的水动力性能,得到船体各自由度的运动响应,慢漂载荷,附加质量和势流阻尼等;随后,利用分块法将波浪散点图离散为若干个海况,基于准动态方法对多点系泊系统进行分析,得到各海况下船体的漂移和各系泊缆的张力;最后,结合前两步的计算结果,采用T-N曲线,雨流计数和Miner线性累计损伤理论对系泊缆的疲劳寿命进行预报。研究结果表明,各系泊缆的疲劳寿命沿长度方向的分布趋势基本一致,锚链顶端和触底部分的疲劳寿命较短。此外,西非海域的涌浪对系泊缆的疲劳损伤较大,系泊设计时应予以重点关注。 相似文献
8.
多点系泊型式浮式生产储油船(FPSO)的运动响应预报 总被引:2,自引:0,他引:2
对多点系泊形式FPSO的运动响应及系泊力问题进行了研究,通过软件和试验结果的对比,就软件预报的可用性进行了评估,并用软件计算了系泊位置变化对FPSO运动响应和系泊力的影响.对比表明,MOSES软件计算多点系泊型式FPSO运动响应的结果具有较好的可信度. 相似文献
9.
FPSO系泊系统设计上的考虑 总被引:1,自引:0,他引:1
作为具有高科技含量的系泊系统,是FPSO(浮式生产储/卸系统)的关键组成部分.根据不同的环境条件和作业要求,其系泊方式也是不同的.其中单点系泊系统(Single Point Mooring System,简称SPM)用的最多、最普遍.本文从介绍FPSO系泊系统入手,对目前应用较为广泛的几类系泊方式进行了较为详细的介绍.然后结合实际,重点对FPSO单点系泊系统在设计上需要考虑的内容进行了分析.最后对中国海域FPSO系泊系统的应用进行了简单的介绍. 相似文献
10.
在FPSO的设计中.系泊技术是最为核心的技术之一。适用于FPSO的系泊系统可大致分为如下两类:多点式系泊系统(SMS)和单点式系泊系统(SPM)。 相似文献
11.
12.
Response based analysis (RBA) has been developed for prediction of extreme N-year return period responses and design metocean conditions of offshore structures. For applying the RBA, the behaviour of the offshore system subjected to a long history of metocean conditions needs to be predicted, and then, the probabilistic analysis is applied to estimate its long-term responses. Due to the large number of analysis cases required, the structural simulation is usually performed either by simplifying the structural model or by using computationally efficient tools, such as frequency-domain (FD) analysis. These approaches usually decrease the accuracy of predictions mainly when they are utilized for nonlinear systems. On the other hand, employing time-domain (TD) simulations leads to more accurate results but it is computationally expensive. Application of RBA for a weathervaning FPSO, which is the subject of the present study, makes TD analysis an essential requirement because of a highly nonlinear behaviour of the system. In the present study, an efficient methodology is proposed that aims at reducing the computational efforts of RBA by joint application of TD and FD simulations in combining the structural and statistical analyses through a single process, such that the number of time-consuming TD simulations is minimized. After initial screening using the results from FD simulations, the methodology identifies the response events (storms) that contribute the most to the N-year response and sets out an iterative process in which only those events that are most important are analysed by fully-coupled TD simulations. Within such events, a similar approach is also applied to intervals (sea states) where only the most contributing intervals are analysed in TD, and the remaining intervals are left for a less accurate FD analysis without sacrificing the overall accuracy. The proposed methodology provides a robust framework for distinguishing between “mild” and “severe” response events, without specifying any predefined limits for the metocean parameters or making a subjective judgement. Although it is developed for the mooring system of a weathervaning FPSO, it should also be applicable to any type of offshore structure and any structural response. This paper is the first part of the study and concentrates on the development of the efficient methodology to optimize the application of RBA to FPSO mooring systems, whilst its detailed application is subject of the second part of the study. 相似文献
13.
14.
15.
针对500年一遇的极端海况条件,对15万吨深水单点系泊系统FPSO的运动响应和系泊线受力特性进行了研究,为FPSO后续的基本设计和详细设计提供技术分析依据.基于水动力计算软件AQWA和ORCAFLEX,分别研究了500年一遇海况波浪主控环境条件、风主控环境条件、流主控环境条件对15万吨深水单点系泊FPSO运动响应的影响.计算结果表明:压载状态下运动响应幅值普遍大于满载状态下的运动响应幅值,波浪主控环境条件对FPSO运动响应的影响要明显大于风流主控环境条件,且风浪流成夹角作用时FPSO运动响应更大. 相似文献
16.
文章阐述了浮式生产储油卸油轮(FPSO)的单点系泊装置的维修过程中所需解决的技术难题,主要包括焊接试验及焊接过程中和焊后的保温处理,为同类企业修复大型海洋工程重要部件提供了范例. 相似文献
17.
本文主要是阐述了在恶劣的海况下,FPSO船体梁上甲板变形的特点,着重研究了船梁变形对甲板模块支撑结构内部应力的影响,并提出了FPSO设计甲板模块时采取什么样的支撑形式,才能够尽量减小船梁变形带来的影响。 相似文献
18.
模块支墩的可靠与否直接影响整个FPSO的生产流程.模块支墩一般布置在强横梁或横舱壁与纵骨交接的位置上,并且一般在支墩所在的主甲板下设置加强结构,对其强度需要通过有限元分析校核.作者利用两个简单的力学模型,探讨了模块支墩甲板下加强结构的快速设计方法,指出了在何种情况下应对模块支墩下甲板作加强处理,同时也提出了加强结构构件的估算公式,经有限元分析验证,结果令人满意,表明该方法对解决实际工程问题有一定的参考价值. 相似文献