﻿ 半潜式钻井平台锚泊系统设计与试验验证
 舰船科学技术  2016, Vol. 38 Issue (8): 62-66 PDF

Mooring system design and experimental verification of a semi drilling platform in deepwater
ZHAO Jing-rui, FENG Wei, DU Qing-gui
CNOOC Research Institute, Beijing 100028, China
Abstract: A multi-point mooring system is designed for a semi drilling platform in deepwater, and the coupled dynamic response of the hull and mooring system are obtained using numerical method and verified by model test. The result shows that the maximum horizontal offset of the vessel and the tension in cable can satisfy the requirement of the design criterion under drilling operation and survival condition, and because the equivalent truncated method which are adopted in the model test underestimate the mass inertia characteristic of the cable and the liquid load which act on it, the tension result from the numerical process are larger than that of model test.
Key words: multi-point mooring system     coupled dynamic response     equivalent truncated method     mass inertia characteristic
0 引  言

1 设计基础 1.1 目标船

 图 1 平台总布置图 Fig. 1 General arrangement of the platform

1.2 环境条件

2 系泊系统与校核指标

3 系泊系统耦合动力响应计算与校核 3.1 模型建立

 图 2 半潜式平台水动力模型 Fig. 2 Hydrodynamic model of semi platform

 图 3 平台与系泊系统耦合分析模型 Fig. 3 The coupled model of the hull and mooring system
3.2 风流载荷

 图 4 平台所承受的风流力模拟对比 Fig. 4 Comparison of wind and current forces act on the platform

3.3 阻尼系数与船体运动RAO

 图 6 半潜式平台水池试验模型 Fig. 6 Experimental model of the semi platform

 图 5 船体纵荡运动RAO对比 Fig. 5 RAO comparison of surge motion
4 水池试验

 图 7 平台纵荡位移时间历程与频谱结果对比（钻井作业工况，载荷方向180°） Fig. 7 Comparison of time history and spectrum of surge motion (drilling operation condition, environment loading heading=180°)

5 结  语

1）该平台在目标气田10年一遇非台风工况下水平偏移量小于5%的作业水深，满足钻井作业对于平台偏移的要求，而10年一遇台风工况下平台系泊张力的安全系数也满足设计规范要求。

2）通过与水池实验结果的对比发现，深水作业时缆绳的自身的质量惯性会对于系泊缆绳的顶部张力产生重要影响，导致水池实验不能对其进行准确模拟，系泊设计时需保证其具有足够的余量。

 [1] 方华灿. 对我国深水半潜式平台设计的几点浅见[J]. 中国海洋平台 , 2008, 23 (2) :1–7. FANG Hua-can. A few superficial views for the design of semisubmersible platform in deep water[J]. China Offshore Platform , 2008, 23 (2) :1–7. [2] 石山, 冉志煌, 漆春茂. 海洋工程深水开发浮式系统的耦合计算方法[J]. 中国造船 , 2005, 46 (4) :47–51. SHI Shan, RAN A, QI Chun-mao. Coupled analysis of deep water floating systems[J]. Shipbuilding of China , 2005, 46 (4) :47–51. [3] 郭宝中. 流花11-1油田FPS扩展性系泊系统设计[J]. 中国海洋油气(工程) , 1996, 8 (2) :1–9. GUO Bao-zhong. Design of FPS extending mooring system for Luihua 11-1 oilfield[J]. China Offshore Oil and Gas (engineering) , 1996, 8 (2) :1–9. [4] 《海洋石油工程设计指南》编委会. 海洋石油工程深水油气田开发技术[M]. 北京: 石油工业出版社, 2010 . [5] American Petroleum Institute. Design and analysis of stationkeeping systems for floating structures[S]. API recommended practiced 2SK, 2005 http://infostore.saiglobal.com/emea/details.aspx?ProductID=790555