摘要
针对在极限波浪作用下的半潜式海洋平台的水动力特性,采用基于边界元法的AQWA水动力学软件对其进行数值模拟研究。建立某半潜式海洋钻井平台的三维水动力频域分析模型,通过数值计算得到平台的附加质量、辐射阻尼和运动响应;通过Cumins法将频域计算结果转换引入时域分析模块,建立平台的三维水动力时域分析模型,计算平台在工作和自存工况下的时域水动力响应,并将低频响应与波频响应进行对比,同时计算与校核在两种工况下的系泊绳系泊力,并由此优化设计确定平台的系泊系统;采用确定性设计波法确定在不同工况下的设计波,通过接口命令流将波浪载荷映射在平台整体结构上,由此可以得到平台在不同工况下的波浪载荷;给出半潜式海洋平台水动力计算及分析的系统性方法及实例,对半潜式海洋平台初步方案设计具有一定的参考价值。
Aiming at the hydrodynamic characteristics of semi submersible offshore platform exerted by the extreme waves,the numerical simulation of this platform is carried out using hydrodynamic software AQWA based on the boundary element method.A3D analysis model in frequency domain of a semi submersible offshore drilling platform is established and the additional mass,radiation damping and motion response of the platform are obtained by numerical calculation.The frequency domain calculation results are transformed into the time domain analysis module using the Cumins method,and the3D hydrodynamic analysis model of the platform in time domain is established.The hydrodynamic responses of the platform in time domain under working and self storing conditions are calculated,and the low frequency response is compared with the wave frequency response.The mooring forces of the rope under two working conditions are calculated and checked,and the mooring system of the platform is optimized and designed.The design wave is obtained using the deterministic design wave method under different working conditions.The wave load is mapped onto the whole structure of the platform through the interface command flow,so that the wave loads of the platform under different working conditions can be obtained.A systematic analysis method and example of hydrodynamic calculation and analysis of semi submersible offshore platform are given,which has certain reference value for the preliminary scheme design of semi submersible offshore platform.
作者
孙雷
罗贤成
姜胜超
刘昌凤
SUN Lei;LUO Xiancheng;JIANG Shengchao;LIU Changfeng(School of Naval Architecture & Ocean Engineering, Dalian University of Technology,Dalian 116024, Liaoning, China;Collaborative Innovation Center for Advanced Ship and Deep SeaExploration(CISSE), Shanghai 200240, China;College of Ocean and Civil Engineering,Dalian Ocean University, Dalian 116023, Liaoning, China)
出处
《中国海洋平台》
2018年第6期65-76,84,共13页
China offshore Platform
基金
国家自然科学基金项目(51679035
51409039)
国家重点基础研究发展计划(2013CB036101)
教育部博士点基金(20130041120008)
中央高校基本科研业务费专项资金(DUT2017TB05
DUT15ZD218)
工信部高技术船舶科研项目
关键词
运动响应
系泊系统
设计波
波浪载荷
半潜式海洋平台
motion response
mooring system
design wave
wave load
semi submer sible offshore platform
