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平台的稳定是保障海上漂浮式风力机能够安全运行的基础。为了保障海上平台的稳定及漂浮式风力机的安全运行,基于Semi-submersible平台的NREL(国家可再生能源实验室)5 MW漂浮式风力机模型,采用辐射/衍射理论并结合有限元方法,调用水动力学软件AQWA(水动力学分析软件),考虑风、浪、流载荷的联合作用,对平台的动态响应进行数值模拟分析,得到了F-K力(波浪力)和绕射力对平台6个自由度运动的影响以及各波浪力随波浪频率的变化趋势。结果表明:平台在低频波浪时容易出现较大响应;随着海洋环境恶劣程度的增加,平台的动态响应增大;垂荡方向的时域和频域响应程度均小于纵荡方向。
The stability of the platform is the basis for ensuring the safe operation of offshore floating wind turbine. In order to ensure the stability of the offshore platform and the safe operation of the floating wind turbine, based on the semi-submersible platform NREL (National Renewable Energy Laboratory) 5 MW floating wind turbine model, using the radiation / diffraction theory combined with the finite element method Hydrodynamic software AQWA (hydrodynamic analysis software), considering the combined action of wind, wave and flow load, the dynamic response of the platform is numerically simulated and analyzed. The dynamic response of FK (wave force) and diffraction to the platform is 6 The influence of the degree of freedom movement and the tendency of each wave force with the wave frequency. The results show that the platform tends to have a large response at low frequency waves. With the increase of the marine environment, the dynamic response of the platform increases. Both the time and frequency response in the sag direction are less than the longitudinal oscillation.