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本文以OC3-Hywind Spar平台5 MW漂浮式风力机为基础建立整机模型,采用气动-水动-伺服-弹性全耦合软件FAST,模拟计算风力机在3种经典工况下的整机动力特性并对比分析。结果表明:风轮扭矩与风力机功率的变化趋势基本一致,但扭矩波动更为剧烈,风轮轴向推力受到风速和波浪周期的影响;不同工况下塔基动态载荷差异较大,但前后弯矩是主要受力方向;平台的纵荡和纵摇的变化最为剧烈,波浪对平台摇荡具有明显抑制作用;3种工况下导缆器张力与锚碇张力随时间变化规律十分相似,且系泊缆的最大张力变化规律与平台纵荡变化规律一致。
In this paper, based on the OC3-Hywind Spar platform 5 MW floating wind turbine, the whole model is established. The dynamic characteristics of the wind turbine under three classic conditions are simulated by FAST, a fully coupled aerodynamic-hydraulic-servo-elastic- And comparative analysis. The results show that the variation trend of wind turbine torque and wind turbine power are basically the same, but the torque fluctuation is more severe. The axial thrust force of wind turbine is affected by wind speed and wave cycle. The dynamic load of tower foundation varies greatly under different working conditions. However, Moment is the main direction of force; the change of longitudinal oscillation and pitch of the platform is the most violent, and the wave has a significant inhibitory effect on the platform sway; the tension of the fairlead and the tension of anchor tendon change with time under the three conditions are very similar The variation of the maximum tension of the cable is consistent with that of the platform.