基于AQWA的新型10 MW浮式平台运动响应分析

Dynamic characteristics of a new 10 MW floating platform based on AQWA

随着海上风机由近海进入深海,低功率的风机不再满足海上发电需求,需要设计出新的海上浮式平台来支撑更大功率的风机。基于频域与时域的分析方法,运用AQWA软件,对一种新型10 MW浮式平台在风、浪、流联合作用下的水动力性能进行研究。通过对不同浪向角下幅值响应算子(RAO)、附加质量、运动响应以及系泊张力的计算,结果表明,平台垂荡、横摇和纵摇的固有周期可以有效避开海上波浪能量集中的周期范围;在极限工况下纵荡、纵摇以及垂荡的最值分别为16.83 m、11.81°以及-6.213 m,说明有着良好的运动性能;系泊缆的安全系数为1.92,于允许安全系数1.67,能够保证平台安全运行。

As offshore wind turbines move into deeper waters,low-power turbines are no longer sufficient to meet the increasing demand for maritime power generation.Thus,new offshore floating platforms need to be designed to support larger power wind turbines.In order to assess the feasibility and safety of a newly proposed 10 MW floating platform,the AQWA software was employed to conduct hydrodynamic analysis of the platform under combined wind,wave and current actions.Through the calculation of the amplitude response operator(RAO),added mass,motion response,and mooring tension under different wave direction,it is found that the natural periods of the platform heave,roll and pitch meet the natural periods of offshore waves;The maximum values of pitch,pitch and heave are 16.83 m,11.81 and 6.213 m,respectively,indicating its good motion performance.The safety factor of mooring cables is 1.92,which is greater than the allowable value of 1.67,and can ensure the safe operation of the platform.