基于Sesam的柔性连接浮式栈桥波浪动力特性分析
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摘要
为了保证浮式栈桥能够在波浪中正常使用,基于三维势流软件Sesam对系泊浮式栈桥的运动响应与缆绳张力进行非线性时域耦合数值预报。分析了桥节间有无缆绳连接、浪向角等因素对浮式栈桥运动响应的影响。计算结果表明,浮式栈桥的运动响应与缆绳张力受缆绳连接与浪向的影响很大。在有义波高为1.25m谱峰周期为6s时,有缆绳连接的桥节间相对纵荡最大幅值是无缆绳连接时的0.54倍;当浪向为90°时,浮式栈桥横荡方向与垂荡方向运动幅值范围最大;当浪向为105°时,桥节间相对纵荡运动幅值最大。综上所述,桥节间有缆绳连接可以大幅度减少其相对运动幅值,在布置浮式栈桥时,建议选取浪向角为150°~180°。
To guarantee the floating pier works normally under the influence of wave,a time-domain nonlinear coupled method was used to numerically forecast the motion responses and the mooring tensions of the moored floating pier system by sesam software in this paper.The influences of the connecting mooring lines between the adjacent piers and different wave directions on the motion responses of the floating pier were concerned.The results reveal that the above-mentioned influences are very great.As significant wave height is 1.25 mand peak spectral period is 6s,the peak amplitude of the relative surge motion of the adjacent piers with the connecting mooring lines is 0.54 times as large as that without the connecting mooring lines.And when the wave direction is 90°,the amplitudes of sway and heave motions of the floating pier are the largest.As the wave direction is 105°,the amplitudes of the relative motions of the adjacent piers are the largest.As a whole,the connecting mooring lines between the adjacent piers can reduce the amplitude of relative motion greatly.And when placing the floating pier,the wave direction should be 150°~180°.
To guarantee the floating pier works normally under the influence of wave,a time-domain nonlinear coupled method was used to numerically forecast the motion responses and the mooring tensions of the moored floating pier system by sesam software in this paper.The influences of the connecting mooring lines between the adjacent piers and different wave directions on the motion responses of the floating pier were concerned.The results reveal that the above-mentioned influences are very great.As significant wave height is 1.25 mand peak spectral period is 6s,the peak amplitude of the relative surge motion of the adjacent piers with the connecting mooring lines is 0.54 times as large as that without the connecting mooring lines.And when the wave direction is 90°,the amplitudes of sway and heave motions of the floating pier are the largest.As the wave direction is 105°,the amplitudes of the relative motions of the adjacent piers are the largest.As a whole,the connecting mooring lines between the adjacent piers can reduce the amplitude of relative motion greatly.And when placing the floating pier,the wave direction should be 150°~180°.
引文
[1]OHKUSU M.Ship motions in vicinity of a structure[C]//Proceedings of International Conference on Behavior of Offshore Structure.Trondheim:NIT,1974:284-306.
[2]FANG M C,CHEN G R.The relative motion and wave elevation between two floating structures in wave[C]//Proceedings of the 11th International Offshore and Polar Engineering Conference.Stavanger:International Shopbuilding Progress,2001:631-368.
[3]FANG M C,CHEN G R.On three dimensional solutions of drift forces and moments between two ships in wave[J].Journal of Ship Research,2002,46(4):280-288.
[4]李西亮,王树青.浅水浮式生产储卸油系统与油轮并联外输时的运动响应研究[J].中国海洋大学学报,2013,43(8):99-106.LI Xiliang,WANG Shuqing.Motion analysis of FPSO and shuttle tanker during side-by-side offloading in shallow waters[J].Periodical of Ocean University of China,2013,43(8):99-106.
[5]王翔,沈庆.锚泊多浮体系统动态响应[J].解放军理工大学学报:自然科学版,2007,8(4):369-374.WANG Xiang,SHEN Qing.Dynamic response of muti-fIoating-body system[J].Journal of PLA University of Science and Technology(Natural Science Edition),2007,8(4):369-374.(in Chinese).
[6]付世晓,崔维成.间隙对拼组式浮桥静态响应的影响分析[J].船舶力学,2004,8(3):86-94.FU Shixiao,CUI Weicheng.Effect of gaps on static response of a belt floating bridge[J].Journal of Ship Mechanics,2004,8(3):86-94.(in Chinese).
[7]孙明,刘培林.深海安装中多浮体作业的水动力分析[J].水动力学研究与进展,2011,26(3):352-358.SUN Ming,LIU Peilin.Hydrodynamic analyzing of multi-body operation in deepwater installation[J].Chinese Journal of Hydrodynamics,2011,26(3):352-358.(in Chinese).
[8]史琪琪,柏木正.基于高阶边界元法和波浪交互理论的三维相邻多浮体问题研究[J].船舶力学,2012,16(5):504-513.SHI Qiqi,Masashi Kashiwagi.Research on S-D problem of adjacent mulitiple floating bodies based on HOBEM and wave interaction theory[J].Journal of Ship Mechanics,2012,16(5):504-513.(in Chinese).
[9]刘培林,赵君龙.深水平台上层模块海上吊装多浮体响应分析[J].中国造船,2011,52(1):157-164.LIU Peilin,ZHAO Junlong.Multi-floating bodies response analysis of offshore lifting as topside module of platform in deep water[J].Ship Building of China,2011,52(1):157-164.(in Chinese).
[10]孙海晓,倪健.SPAR平台与半潜船波浪上相对运动分析研究[J].中国海洋平台,2013,28(4):46-52.SUN Haixiao,NI Jian.Analysis of relative motion between SPAR and semi-submersible floating in waves[J].China Offshore Platform,2013,28(4):46-52.(in Chinese).
[11]余建星,苏春华.近海移动式栈桥码头运动性能计算方法[J].中国港湾建设,2006,34(6):14-17.YU Jianxing,SU Chunhua.Research on motion ability calculation method of offshore moving trestle[J].China Harbour Engineering,2006,34(6):14-17.(in Chinese).
[12]王桂波,勾莹.铰接多浮体系统在规则波作用下的运动响应[J].大连理工大学学报,2014,35(6):618-625.WANG Guibo,GOU Ying.The motion response of articulated multi body floating system under irregular wave action[J].Journal of Dalian University of Technology,2014,35(6):618-625.(in Chinese).
[13]中国国家标准化管理委员会.GB/T 549-2008电焊锚链[S].北京:中国标准出版社,2008.
[2]FANG M C,CHEN G R.The relative motion and wave elevation between two floating structures in wave[C]//Proceedings of the 11th International Offshore and Polar Engineering Conference.Stavanger:International Shopbuilding Progress,2001:631-368.
[3]FANG M C,CHEN G R.On three dimensional solutions of drift forces and moments between two ships in wave[J].Journal of Ship Research,2002,46(4):280-288.
[4]李西亮,王树青.浅水浮式生产储卸油系统与油轮并联外输时的运动响应研究[J].中国海洋大学学报,2013,43(8):99-106.LI Xiliang,WANG Shuqing.Motion analysis of FPSO and shuttle tanker during side-by-side offloading in shallow waters[J].Periodical of Ocean University of China,2013,43(8):99-106.
[5]王翔,沈庆.锚泊多浮体系统动态响应[J].解放军理工大学学报:自然科学版,2007,8(4):369-374.WANG Xiang,SHEN Qing.Dynamic response of muti-fIoating-body system[J].Journal of PLA University of Science and Technology(Natural Science Edition),2007,8(4):369-374.(in Chinese).
[6]付世晓,崔维成.间隙对拼组式浮桥静态响应的影响分析[J].船舶力学,2004,8(3):86-94.FU Shixiao,CUI Weicheng.Effect of gaps on static response of a belt floating bridge[J].Journal of Ship Mechanics,2004,8(3):86-94.(in Chinese).
[7]孙明,刘培林.深海安装中多浮体作业的水动力分析[J].水动力学研究与进展,2011,26(3):352-358.SUN Ming,LIU Peilin.Hydrodynamic analyzing of multi-body operation in deepwater installation[J].Chinese Journal of Hydrodynamics,2011,26(3):352-358.(in Chinese).
[8]史琪琪,柏木正.基于高阶边界元法和波浪交互理论的三维相邻多浮体问题研究[J].船舶力学,2012,16(5):504-513.SHI Qiqi,Masashi Kashiwagi.Research on S-D problem of adjacent mulitiple floating bodies based on HOBEM and wave interaction theory[J].Journal of Ship Mechanics,2012,16(5):504-513.(in Chinese).
[9]刘培林,赵君龙.深水平台上层模块海上吊装多浮体响应分析[J].中国造船,2011,52(1):157-164.LIU Peilin,ZHAO Junlong.Multi-floating bodies response analysis of offshore lifting as topside module of platform in deep water[J].Ship Building of China,2011,52(1):157-164.(in Chinese).
[10]孙海晓,倪健.SPAR平台与半潜船波浪上相对运动分析研究[J].中国海洋平台,2013,28(4):46-52.SUN Haixiao,NI Jian.Analysis of relative motion between SPAR and semi-submersible floating in waves[J].China Offshore Platform,2013,28(4):46-52.(in Chinese).
[11]余建星,苏春华.近海移动式栈桥码头运动性能计算方法[J].中国港湾建设,2006,34(6):14-17.YU Jianxing,SU Chunhua.Research on motion ability calculation method of offshore moving trestle[J].China Harbour Engineering,2006,34(6):14-17.(in Chinese).
[12]王桂波,勾莹.铰接多浮体系统在规则波作用下的运动响应[J].大连理工大学学报,2014,35(6):618-625.WANG Guibo,GOU Ying.The motion response of articulated multi body floating system under irregular wave action[J].Journal of Dalian University of Technology,2014,35(6):618-625.(in Chinese).
[13]中国国家标准化管理委员会.GB/T 549-2008电焊锚链[S].北京:中国标准出版社,2008.