深海Spar平台系泊系统动态张力影响因素分析  

Factors Affecting Dynamic Tension of Multi-Component Mooring System of Deepwater Spar Platform

作　　者：武昌旭 魏代锋 范赞[2] 张进[1] 潘锐[3] 刘军鹏[1] Wu Changxu;Wei Daifeng;Fan Zan;Zhang Jin;Pan Rui;Liu Junpeng(School of Safety and Ocean Engineering,China University of Petroleum(Beijing);Kunming Ship Equipment Research and Test Center of China State Shipbuilding Corporation;Offshore Oil Engineering Co.,Ltd.)

机构地区：[1]中国石油大学(北京)安全与海洋工程学院 [2]中国船舶集团公司昆明船舶设备研究试验中心 [3]海洋石油工程股份有限公司

出　　处：《石油机械》2021年第11期50-58,共9页China Petroleum Machinery

基　　金：国家重点研发计划项目“深海浮式结构物监测集成技术研究”(2018YFC0310504)。

摘　　要：锚链张力是评估系泊系统结构性能的关键指标。针对深海Spar平台系泊系统动张力的影响因素进行分析,建立了平台锚链单组分以及锚链-钢缆-锚链多组分系泊系统模型,研究了钢缆长度、激励幅值以及激励频率对系泊系统构形及动态张力响应等的影响规律。研究结果表明:较单组分系泊系统而言,采用多组分系泊系统所需的预张力更小,在进行系泊定位时张力分布更均匀,更能保证系泊系统经济有效地进行设计安装;钢缆长度的变化会引起多组分系泊系统自身重力的变化,进而引起构形的变化,系泊缆卧地锚链段长度随着钢缆长度的增加而减小;激励振幅对于深海平台以及系泊系统稳定性的影响最大,动态张力最大值、最小值与激励振幅分别成正比、反比关系;系泊系统的动态张力响应与激励频率之间存在一定的非线性关系,动态张力最大值、最小值与张力幅值均在激励频率0.60 rad/s附近出现极值,且激励频率对于系泊系统安全稳定性的影响比激励振幅造成的影响小。研究结果对于深海Spar平台系泊系统的性能优化具有一定的指导作用。Tension of anchor chain is a key indicator for evaluating the structural performance of the mooring system. In this paper, in order to analyze the factors affecting the dynamic tension of deepwater Spar platform mooring systems, the influence of cable length, excitation amplitude and excitation frequency on the configuration and dynamic tension response of the mooring system was studied. The results show that: compared with single-component mooring systems, multi-component mooring systems require less pre-tension, and the tension distribution is more uniform during mooring positioning, which could ensure the design and installation of the mooring system in a more cost-effective way;the change of cable length will result in the change of the weight of multi-component mooring system, and then lead to the configuration variation;the length of anchor chain part lying on the ground decreases with the increase of cable length;the excitation amplitude has the greatest influence on the stability of deepwater platform and mooring system, the maximum of dynamic tension is proportional to the excitation amplitude and the minimum of dynamic tension is inverse to the excitation amplitude;there is a nonlinear relationship between dynamic tension response and excitation frequency;the maximum and minimum of dynamic tension and the tension amplitude reach extreme values when the excitation frequency is about 0.60 rad/s, and the influence of excitation frequency on the safety and stability of the mooring system is less than that of the excitation amplitude.The research results could provide some guidance for optimizing the performance of deepwater Spar platform mooring system.

关 键 词：系泊系统 悬链线法 集中质量法 动态张力 OrcaFlex 

分 类 号：TE951[石油与天然气工程—石油机械设备]