FSRU码头系泊模型实验与数值模拟研究
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摘要
FSRU在恶劣环境条件下的作业和安全停靠性能与系泊缆张力、靠垫挤压应力、船体6自由度运动等参数有关。针对FSRU码头处海洋环境条件,进行FSRU不同装载状况的模型实验,获得FSRU的6自由度运动及其系泊载荷的动力特性。基于三维辐射和绕射理论,使用Sesam软件进行频域计算,以此为基础在相应海洋环境条件下进行时域耦合分析,获得FSRU 6自由度运动、系泊载荷、靠垫应力等参数的响应时历。结果表明:30%装载、横浪条件下FSRU的运动响应最大,系泊缆张力未达到破断值,靠垫压力超过其压缩60%时的载荷;模型实验对FSRU运动响应和系泊缆张力的预测结果可信,靠垫受力情况需要数值仿真进行辅助研究。
The operation and safety performance of FSRU mooring to dock in harsh conditions is tightly related to the mooring line tension,fender extrusion stress and motion of response,etc.The FSRU model tests of different loading conditions were conducted,and the six degrees of freedom motion responses,dynamic mooring loads were obtained.Based on the three-dimensional radiation and diffraction theory,Sesam software was used for frequency domain calculation of FSRU.Then the result was utilized to set up a time domain coupling procedure under the corresponding marine environment.The 6DOF motion,mooring line tension and fender extrusion stress were acquired.Results show that the motion of FSRU achieves the maximum value when it is 30% loaded in beam wave.The mooring tension fracture has not gone beyond,but the extrusion stress of fenders exceeds the value of maximum 60% deflection.It is more reliable to predict FSRU motion response and mooring force by model test,but the numerical simulation is still an important auxiliary method to investigate fender pressure.
The operation and safety performance of FSRU mooring to dock in harsh conditions is tightly related to the mooring line tension,fender extrusion stress and motion of response,etc.The FSRU model tests of different loading conditions were conducted,and the six degrees of freedom motion responses,dynamic mooring loads were obtained.Based on the three-dimensional radiation and diffraction theory,Sesam software was used for frequency domain calculation of FSRU.Then the result was utilized to set up a time domain coupling procedure under the corresponding marine environment.The 6DOF motion,mooring line tension and fender extrusion stress were acquired.Results show that the motion of FSRU achieves the maximum value when it is 30% loaded in beam wave.The mooring tension fracture has not gone beyond,but the extrusion stress of fenders exceeds the value of maximum 60% deflection.It is more reliable to predict FSRU motion response and mooring force by model test,but the numerical simulation is still an important auxiliary method to investigate fender pressure.
引文
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[11]施峰.半潜式海洋平台水动力性能初步研究[D].镇江:江苏科技大学,2010.(SHI Feng.Preliminary study of hydrodynamic performance of SEMI[D].Zhenjiang:Jiangsu University of Science and Technology,2010.(in Chinese))
[2]都大永,王蒙.浮式LNG接收站与陆上LNG接收站的技术经济分析[J].天然气工业,2013,33(10):122-126.(DU Dayong,WANG Meng.Tech-economic analysis of floating and onshore LNG terminals[J].Natural Gas Industry,2013,33(10):122-126.(in Chinese))
[3]马继红,梁金鹏,陈营,等.靠岸浮式LNG接收终端的工艺建设方案研究[J].山东化工,2013,42(3):49-52.(MA Jihong,LIANG Jinpeng,CHEN Ying,et al.Study on the process of construction design of the shore floating LNG terminal[J].Shandong Chemical Industry,2013,42(3):49-52.(in Chinese))
[4]CHO S,SUNG H,HONG S,et al.Experimental study on the effect of sloshing on side-by-side moored FSRU and LNGC[C]//Proceedings of the Twenty-first International Offshore and Polar Engineering Conference.International Society of Offshore and Polar Engineers,2011.
[5]CHO S,HONG S,KIM J,et al.Studies on the coupled dynamics of ship motion and sloshing including multi-body interactions[C]//Proceedings of the Seventeenth International Offshore and Polar Engineering Conference.International Society of Offshore and Polar Engineers,2007.
[6]KIM B W,HONG S Y,SUNG H G,et al.Fatigue life assessment of FSRU mooring system[C]//Proceedings of the Twenty-second International Offshore and Polar Engineering Conference.International Society of Offshore and Polar Engineers,2012.
[7]江涛.浮式LNG接收终端(FSRU)靠泊方案及码头设计研究[D].大连:大连海事大学,2012.(JIANG Tao.A study of the berthing plan and design of LNG floating storage and re-gasification unit[D].Dalian:Dalian Maritime University,2012.(in Chinese))
[8]赵文华.浮式液化天然气装备(FLNG)水动力性能的数值分析及实验研究[D].上海:上海交通大学,2014.(ZHAO Wenhua.Numerical and experimental study on hydrodynamics of an FLNG system[D].Shanghai:Shanghai Jiao Tong University,2014.(in Chinese))
[9]张威,杨建民,胡志强,等.深水半潜式平台模型试验与数值分析[J].上海交通大学学报,2007,41(9):1429-1434.(ZHANG Wei,YANG Jianmin,HU Zhiqiang,et al.The experimental and numerical analysis for a deep-water semi-submersible platform[J].Journal of Shanghai Jiao Tong University,2007,41(9):1429-1434.(in Chinese))
[10]郑成荣.深海系泊浮体的耦合分析及锚系的动力特性研究[D].上海:上海交通大学,2012.(ZHENG Chengrong.Coupled analysis of deep-sea moored floating body and research on dynamic characteristics of mooring system[D].Shanghai:Shanghai Jiao Tong University,2012.(in Chinese))
[11]施峰.半潜式海洋平台水动力性能初步研究[D].镇江:江苏科技大学,2010.(SHI Feng.Preliminary study of hydrodynamic performance of SEMI[D].Zhenjiang:Jiangsu University of Science and Technology,2010.(in Chinese))