中文摘要：

以风力机叶片的简化模型为研究对象,根据流体流动守恒定律建立了流体流动控制方程,利用New-mark法求解了结构运动控制方程。通过计算流体动力学软件FLUENT模拟了近海风场作用下叶片表面风压分布,并把流体域得出的风压作为结构域的压力载荷,进而计算并分析了平均风速对风力机叶片动力响应的影响。计算结果表明结构位移随着入口平均风速的增大而增大,叶片表面最大风压以及尖端中点的位移幅值随平均风速的变化呈非线性增长关系,而最大位移随最大风压变化基本呈线性关系。

英文摘要：

A simplified model of the wind turbine blade is selected as research object in this paper,in which the flow governing equations are established according to the fluid flow conservation law,and the Newmark method is employed to solve the structure governing equations.The wind pressure distribution on the wind turbine blade surface is simulated by using Computational Fluid Dynamics（CFD）software FLUENT,the wind pressure obtained by the fluid domain is used as the load of the structure domain,and then the blade dynamic responses under different average wind velocities are calculated and analyzed.The calculation results show that the structural displacement response increases with the inlet mean wind speed,and the maximum pressure on the blade surface,as well as the center point maximum displacement at the upper part,changes with non-linear feature with the increasing of the average wind speed.Furthermore,the maximum displacement mostly increases with the maximum pressure in a linear relationship.