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建立OC3-Hywind Spar Buoy平台的NREL 5 MW漂浮式风力机整机模型,采用基于辐射绕射理论的面元法和完整的二阶传递函数(QTF)计算一阶与二阶波浪载荷,并利用叶素-动量理论对叶片气动载荷进行计算.对一阶与二阶波浪载荷以及由其引起的波频与慢漂响应进行对比分析,并分别讨论风、浪联合作用和不同海况下风、浪、流联合作用时的波频与慢漂响应.结果表明:一阶波浪载荷比二阶波浪载荷至少大1个量级,但两者引起的动态响应幅值在同一个量级;气动载荷不仅影响慢漂响应,而且对波频响应也有一定影响;波频响应主要受海浪影响,慢漂响应主要受气动载荷影响.
The whole model of NREL 5MW floating wind turbine with OC3-Hywind Spar Buoy platform is established. The first-order and second-order wave loads are calculated by the surface element method based on the radiation diffraction theory and the complete second-order transfer function (QTF) The theory of momentum theory is used to calculate the aerodynamic loads on the blades.The contrastive analysis of the first and second order wave loads and their response to the wave frequency and slow drift is carried out and the effects of wind and waves combined with the wind and waves, The results show that the first-order wave load is at least one order of magnitude larger than the second-order wave load, but the dynamic response amplitudes caused by both are in the same order of magnitude. The aerodynamic load not only affects Slow response, but also have some impact on the wave frequency response; wave frequency response is mainly affected by the waves, slow drift response is mainly affected by the aerodynamic load.