新型圆筒型FPSO垂荡抑制结构优化设计  

Optimization design of heave suppression structure for new cylindrical FPSO

作　　者：白杰 李焱[1,2,3] 曲志森[1,2] 唐友刚 BAI Jie;LI Yan;QU Zhisen;TANG Yougang(School of Civil Engineering of Tianjin University,Tianjin 300072,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Port and Ocean Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072 [3]天津大学天津市港口与海洋工程重点实验室,天津300350

出　　处：《海洋工程》2020年第1期20-29,共10页The Ocean Engineering

基　　金：国家工业与信息化部项目(G014614002);中国博士后科学基金资助项目(2019M651042)。

摘　　要：针对传统圆筒型FPSO垂荡运动剧烈的特点,提出一种带有垂荡抑制结构的圆筒型FPSO。采用1∶77.8的缩尺比制作模型,进行垂荡纵摇衰减试验,得到带有不同垂荡抑制结构模型的固有周期和无因次阻尼系数,进而选取最优的垂荡抑制结构型式。之后计算并对比传统圆筒型FPSO和新型圆筒型FPSO垂荡纵摇运动的固有周期和幅频响应函数。在此基础上,结合我国南海海洋环境条件,设计新型圆筒型FPSO的系泊系统,计算分析自存工况下的耦合动力响应,并与传统圆筒型FPSO进行对比。结果表明,文中提出的垂荡抑制结构可以有效增大系统垂荡纵摇运动的固有周期,改善运动性能,提高系泊的安全性。Aiming at the severe characteristics of the traditional cylindrical FPSO heave motion,a cylindrical FPSO with a heave suppression structure is proposed.In order to select the optimal heave suppression structure,the model is made with a scale ratio of 1∶77.8,and the free decay experiment is carried out.Through the experiments,the natural period and dimensionless damping coefficient of the model with different heave suppression structures are obtained.On this basis,the natural period and RAOs of the heave and pitch motion of the traditional cylindrical FPSO and the new cylindrical FPSO are calculated.Considering the marine environment conditions in the South China Sea,the mooring system of the new cylindrical FPSO is designed to calculate and analyze the coupled dynamic response under self-storing conditions.The results show that the heave suppression structure can effectively increase the natural period of the heave and pitch motion,and improve the motion performance and mooring safety.

关 键 词：圆筒型FPSO 垂荡抑制结构 自由衰减试验 系泊系统 时域耦合分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]