为研究粘滞阻尼器参数对风力机振动控制效果的影响，以NREL 5 MW海上风力机为研究对象，基于有限元方法建立风力机模型，针对湍流风诱导下风力机振动，对比分析不同参数粘滞阻尼器作用下塔顶位移及塔壁应力分布。结果表明：粘滞阻尼器可有效控制风载荷导致的风力机塔顶振动，在相对速度指数小于0.7时，随阻尼系数增大对塔顶位移控制效果先增强后减弱。当相对速度指数大于等于0.7时，对塔顶位移控制效果随阻尼系数增加而增强；粘滞阻尼器可减小其连接点上方塔壁米塞斯应力集聚区域的面积；在相对速度指数取1.0，阻尼系数取5.25×107 N•s/m时，粘滞阻尼器对米塞斯应力最大值控制效果最好。在相对速度指数为0.7，阻尼系数为3.75×107 N•s/m时，粘滞阻尼器对米塞斯应力均方差控制效果最好。

In order to study the influence of viscous damper parameters on the vibration control effect of wind turbine,the NREL 5MW offshore wind turbine was taken as the research object.Based on the finite element method,the wind turbine model was established.According to the wind turbine vibration induced by turbulent wind,the tower top displacement and tower wall stress distribution under the action of viscous dampers with different parameters were compared and analyzed.The results show that the viscous dampers can effectively control the vibration on the top of wind turbine caused by wind load.When the relative velocity index is less than 0.7,the control effect of tower top displacement increases first and then decreases with the increase of damping coefficient.When the relative velocity index is greater than or equal to 0.7,the control effect of tower top displacement increases with the increase of damping coefficient.The viscous dampers can reduce the Mises stress concentration area of the square tower wall at the connecting point.With relative velocity index of 1.0 and damping coefficient of 5.25×107 N•s/m,the viscous dampers had the best control effect on Mises stress maximum.With relative velocity index of 0.7 and damping coefficient of 3.75×107 N•s/m,the viscous dampers had the best effect on Mises stress meanvariance control.

TK83

国家自然科学基金（51976131，51676131）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）