中文摘要：

考虑叶片和塔架的动力耦合作用,建立了5 MW风机整体结构的有限元模型,计算其在随机风速下的动响应。为分析叶片和塔架的动力耦合对风机结构动响应的影响,计算比较了刚性支撑的叶片、简化的风机和整体风机3种模型在风载下的动响应位移和应力。计算结果表明：由于叶片和塔架的耦合作用,叶片的位移响应最大增加约20%,但是塔架的位移响应最大降低了约60%。文章还分析了叶片旋转过程中方位角对塔架位移响应的影响。在叶片的一个旋转周期内,塔架的响应幅值会有较大的波动,最大响应幅值约为最小响应幅值的3倍。

英文摘要：

An integrate finite element model of 5 MW wind turbine is developed. The dynamic responses of the wind turbine under random wind are analyzed while the dynamic interaction between the blades and tower is taken into account. In order to study the impact of blade-tower coupling, the dynamic responses of 3 models, i.e. an integrate wind turbine model, a simplified turbine model and a rigid supported blade are examined. The calculation results show that the blades＇ displacement may be about 20% larger than that without blade-tower interaction. Meanwhile the tower＇s displacement response is about 60% smaller than that without blade-tower interaction. In addition, the influence of blade azimuths on tower＇s response is studied. It is shown that the tower＇s displacement response amplitude may have a significant fluctuation during one rotation period, the maximum fluctuation of response amplitude is as much as 300%.