风浪入射角对漂浮式风力机动态响应影响研究

Dynamic Response of Floating Wind Turbine with Wind and Wave Incident Angle

采用开源软件FAST并结合多体动力学方法,以驳船式（ITI Energy Barge）平台5 MW海上漂浮式风力机为研究对象,研究海上漂浮式风力机塔架与平台结构在风浪不同入射角下6个自由度大小与幅值变化,并分析风力机塔架与塔基在风浪入射角度不一致工况下的动态响应;将模拟所得数据在Matlab语言编辑的Mlife程序中运行,进而得到风力机等效疲劳载荷（DEL）。结果表明：平台6个自由度中,纵荡和纵摇随来流风速的变化最为显著;海上风力机的DEL不仅与风浪载荷大小有关,与其方向也有着密切关联;来流风、浪载荷之间的夹角较小时,风力机塔架和塔基的DEL相应较大。研究结果对海上Barge平台结构的设计与安装具有一定的参考价值。

Using open source software FAST combined with multi-body dynamics approach,a 5 MW offshore floating wind turbine on the ITI Energy Barge platform was used as the research object to study the offshore floating wind turbine tower and platform structure under different incident angles of wind and waves. The degree of freedom and amplitude variation were studied. The dynamic response of the wind turbine tower and tower foundation was analyzed under the inconsistent working conditions of the wind wave.The simulation of the data obtained was processed in the Mlife program of Matlab,to obtain the fatigue load( DEL). The results show that the variation of the wind speed with the fluctuating and pitching is of the most significance among the 6 degrees of freedom of the platform. The DEL of the offshore wind turbine is not only related to the size of the wind wave load,but also closely related to its direction. When the angle between the incoming wind and the wave load is small,the DEL of the wind turbine tower and the tower base is relatively large.