新型漂浮式风力机半潜平台抑制摇荡运动设计研究

Design and Research on Suppression Swaying Motion of the New Semi-submersible Platform of Floating Wind Turbine

漂浮式风力机在海洋环境中易受到风、浪和流载荷作用而影响正常运行,为此设计一种新结构漂浮式风力机半潜平台(新平台),运用水动力学软件AQWA并结合有限元方法,对其在复杂海洋环境下进行数值仿真。并与三浮体三立柱结构半潜平台进行对比分析,得到了两平台频域和时域上的运动响应数据。结果表明:较之三浮体三立柱平台,频域分析中新平台横摇、纵摇及垂荡3自由度响应的最大值和平均值都显著减小,体现了良好的稳定性;新平台的垂荡固有周期增加两倍以上,能更加有效地防止共振现象的发生;时域耦合分析中,新平台横摇、纵摇与垂荡的运动响应大幅度减小,且横摇和纵摇运动响应表现更加明显;谱分析中新平台响应谱峰值同样显著减小,体现了新平台更加优越的波频性能。新平台结构合理可行,拥有良好的稳定性,能有效抑制摇荡运动,可为未来漂浮式海上风力机平台设计提供参考。

The floating wind turbine is easily influenced by wind,wave and current in the marine environment.A novel semi-submersible platform of floating wind turbine was designed.The numerical simulation hydrodynamic software AQWA combined with the finite element was used to analyze the motion responses of the novel platform in complicated marine environment by comparison with semi-submersible drilling platforms .with three-column floating three-column structure and heave plate structure.The results show that the maximum and average values of the roll,pitch and heave response of the novel platform are significantly reduced in the frequency domain analysis compared with the three-column floating three-column structure platform,reflecting great stability of novel platform.The natural period of heave of novel platform is increased more than 2 times and thus it can more effectively prevent the occurrence of resonance phenomenon.In the time domain coupling analysis,the roll, pitch and heave motion response of novel platform significantly reduced,and the rolling and pitch motion response performance is more obvious;In the spectral analysis,the novel platform response spectrum peak is also significantly reduced,reflecting more superior wave frequency performance of novel platform.Therefore,the novel platform with great stability is reasonable and feasible and it can effectively suppress the swinging movement,providing a reference for design of floating offshore wind turbine platform in future.