论文部分内容阅读
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。
Taking the simplified model of wind turbine blade as the research object, the fluid flow control equation is established according to the fluid flow conservation law, and the structure motion control equation is solved by New-mark method. The wind pressure distribution on blade surface under offshore wind field was simulated by computational fluid dynamics software FLUENT, and the wind pressure derived from fluid field was used as the pressure load of the domain. Then the average wind speed was calculated and analyzed for the dynamic response of wind turbine blade influences. The calculated results show that the displacement of structure increases with the increase of average wind velocity at inlet, and the maximum wind pressure at blade surface and the amplitude of displacement at midpoint of tip increase nonlinearly with the variation of average wind speed. The maximum displacement varies with the maximum wind pressure A linear relationship.