风机选型是风场设计的重要内容,需从经济性和安全性两个方面进行考虑,其中安全性主要分析风机结构在风、浪、流等外部环境荷载作用下的极限承载力和疲劳寿命,而风机结构响应是以上分析的基础内容.文中以美国国家可再生能源实验室(national renewable energy laboratory,NREL)5 MW风机为研究目标,建立了单桩式和三脚架式两种不同类型海上固定式风机模型,选取北太平洋海域海况,将风、浪、流与风机结构进行全耦合仿真,得到单桩式和三脚架式两种不同形式的风机运动响应,对比分析了风机叶片、塔筒和基础处的位移和载荷,可见三脚架式风机总体性能优于单桩式风机,为北太平洋海域的固定式风机选型提供了技术依据.
Comparative study on the dynamic response of monopile type wind turbines and tripod type wind turbines under the combined effect of wind and wave currents
The wind turbine selection is an important part of the wind farm design,which needs to be considered from both economic and safety aspects,among which safety mainly analyzes the ultimate bearing capacity and fa-tigue life of the wind turbine structure under the action of external environmental loads such as wind,waves and currents,and the structural response of the wind turbine is the basis of the above analysis.In this paper,the 5 MW wind turbine of NREL(national renewable energy laboratory)is used as the research target,and two differ-ent types of offshore fixed wind turbine models,monopile type and tripod type,are established,and the sea con-ditions of the North Pacific Ocean are selected,and the wind,waves and currents are fully coupled with the wind turbine structure for simulation,and the wind turbine motion response of monopile type and tripod type are ob-tained.The overall performance of the tripod type wind turbine is better than that of the monopile type wind tur-bine.This study provides a technical basis for the selection of fixed wind turbines.
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