基于全耦合时域运动模拟的FPSO艏摇失稳研究  

RESEARCH ON YAW INSTABILITY OF FPSO BASED ON FULLY COUPLED TIME-DOMAIN SIMULATION

作　　者：刘亚柳 陈迪郁 刘利琴[1] 黄郑鑫 Liu Yaliu;Chen Diyu;Liu Liqin;Huang Zhengxin(Tianjin University,State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin 300354,China;CCCC second harbor engineering company,Wuhan 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan430040,China;CCCC Highway Bridge National Engineering Research Centre Co.Ltd,Wuhan 430040,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300354 [2]中交第二航务工程局有限公司,武汉430040 [3]长大桥梁建设施工技术交通行业重点实验室,武汉430040 [4]交通运输行业交通基础设施智能制造技术研发中心,武汉430040 [5]中交公路长大桥建设国家工程研究中心有限公司,武汉430040

出　　处：《动力学与控制学报》2022年第6期41-48,共8页Journal of Dynamics and Control

基　　金：天津市交委项目(2018-b2)。

摘　　要：本文建立系泊浮体全耦合非线性六自由度方程,研究了规则波中FPSO的艏摇失稳现象.将数值求解得到的平衡艏摇角与试验结果进行对比,验证了方程的准确性.分析了艏摇失稳对FPSO运动响应的影响,研究了初始艏摇角、波陡对FPSO艏摇失稳和运动响应的影响.结果表明:FPSO在特定波长船长比下会发生艏摇失稳现象,作用在船体上的波浪载荷增大,从而引起较大的横摇和垂荡响应;波陡不会影响最终平衡艏摇角,但会影响艏摇达到平衡所需的时间以及运动响应幅值;初始艏摇角会影响FPSO最终达到的平衡位置和运动响应.In order to study the yaw instability of FPSO in regular waves,nonlinear fully coupled 6-DOF motion equations of moored floating body are established and solved numerically.The accuracy of equation is verified by comparing equilibrium yaw angles calculated by numerical simulation with model test.The influence of yaw instability on motion responses is studied.The influences of initial yaw angle and wave steepness on yaw instability and motion responses are also studied.The results show that the FPSO may lose the weathervane effect at particular wavelength to ship length ratio,and this increases the wave loads acting on the hull which arouse greater responses in roll and heave.The wave steepness doesn’t affect the final equilibrium yaw angle.However,it affects the time required to reach equilibrium and the response amplitude.The initial yaw angle affects the final equilibrium position and motion response of the FPSO.

关 键 词：艏摇失稳 数值模拟 全耦合方程 

分 类 号：U661.32[交通运输工程—船舶及航道工程]