软刚臂单点系泊是浅水海域FPSO重要的系泊方式之一，其结构尺寸及重量较大。通常FPSO排水量较大，软刚臂单点系泊装置对其影响可忽略不计。当软刚臂单点系泊装置用于排水量较小的浮式平台时，其对浮式平台的影响不可忽略。为研究单点系泊装置对小型浮式平台性能的影响，运用AQWA软件，基于耐波性理论基础，分别计算浮式平台在单点系泊状态和顺应式系泊状态下的频响及固有周期；采用时域分析方法，分别计算浮式平台在2种系泊状态下的运动响应。计算结果表明，单点系泊装置会减小浮式平台横摇频响峰值，增大其对应的周期，对纵摇和垂荡的频响影响不大；明显增大横摇和纵摇的固有周期，略微减小垂荡的周期，增大3个运动量的阻尼；增大横摇和垂荡的平均值以及垂荡的幅值，2种系泊方式对横摇和纵摇幅值的影响与风浪流方向分布有关。
Soft yoke single point mooring System is one of the most important mooring methods of FPSO in shallow waters,Which structure size and weight are large.Usually, The influence of soft yoke single point mooring device on FPSO can be ignored because of the large displacement.It may have obvious effect on the performance when the soft yoke single point mooring device is used on the floating platform with small displacement.This paper is to study on the influence of single point mooring device on the performance of small floating platform.Using AQWA software and based on the sea keeping theory,this paper calculate the frequency response and natural period of the floating platform under the single point mooring condition and free state respectively. The time domain analysis method is adopted to calculate the motion response of the floating platform in two moored conditions. The results show that the single point mooring device can decrease the peak of Roll frequency response and increase the corresponding period of the floating platform and has little impact on the pitch and the heave frequency response. The natural period of Roll and Pitch is obviously increased, and the period of Heave is reduced slightly.In addition the damping of the three movements are all increased. The average values of roll and heave are all increased, including the amplitude of heave.The two types of mooring on the influence of Rool and Pitch amplitude are related to the distribution of the wind,wave and current.
2019,41(10): 114-119 收稿日期：2018-10-17
DOI：10.3404/j.issn.1672-7649.2019.10.022
分类号：U661.32+4
基金项目：国家能源局资助项目（NY20150201）
作者简介：余骁(1988-),男,工程师,从事船体与结构水动力、海洋平台结构设计研究
参考文献：
[1] 袁中立, 李春. FPSO的现状与关键技术[J]. 石油工程建设, 2005, 31(6):24-29 YUAN Zhong-li, LI chun. The current situation and key technology of FPSO[J]. Oil Engineering Costruction, 2005, 31(6):24-29
[2] 李积德. 船舶耐波性[M]. 哈尔滨:哈尔滨工程大学出版社, 2007:161-163.
[3] 李淑一. 浅水软刚臂系泊FPSO水动力性能和运动响应数值研究[D]. 青岛:中国海洋大学, 2011. LI Shu-yi. Numerical study on hydrodynamic performance and motion response of shallow water FPSO with Soft Yoke SPM System[D]. Qingdao:Ocean University of China, 2011.
[4] 刘成义. 水深对软刚臂式FPSO浅水效应及触底的影响[D]. 天津:天津大学, 2014. LIU Cheng-yi. Impact of water depth on shallw water effect and seabed-touching for SYM FPSO[D]. Tianjin:Tianjin University, 2014.
[5] 刘成义, 唐友刚, 李焱, 等. 浅水单点系泊FPSO软刚臂参数敏感性分析[J]. 中国舰船研究, 2014, 9(5):69-76 LIU Cheng-yi, TANG You-gang, LI Yan, et al. Sensitivity analysis of the soft yoke parameters of FPSO mooring in shal-low water[J]. Chinese Journal of Ship Research, 2014, 9(5):69-76
[6] Ansys, Inc. Aqwa-Drift Manual[Z]. 2017.
[7] Oil Companies International Marine Forum. Prediction of wind and current loads onVLCC[M]. London:Wiserby & Co., Ltd., 1994.
[8] 李兰霖. 单点系泊系统低频运动响应研究[D]. 大连:大连理工大学, 2013. LI Lan-lin. The study of single point mooring system damping response[D]. Dalian:Da lian University of the Technology, 2013.
[9] 肖龙飞, 杨建民, 胡志强. 极浅水单点系泊FPSO低频响应分析[J]. 船舶力学, 2010, 14(4):372-377 XIAO Long-fei, YANG Jian-min, HU Zhi-qiang. Analysis on the low frequency response of a single point moored FPSO in ultra-shallow water[J]. Journal of Ship Mechanics, 2010, 14(4):372-377
[10] 夏华波. 水下软刚臂单点系泊研究[J]. 船海工程, 2014, 43(3):166-170 XIA Hua-bo. Research on single point mooring of underwater soft yoke[J]. Ship&Ocean Engineering, 2014, 43(3):166-170
