中文摘要：

建立了基于自回归（AR）方法的风场风速模型,求解得到了风速的变化时程;用Glauert方法求得了变风速下风力发电机的输入载荷——推力和扭矩随风速的变化时程;通过对载荷的统计分析得到了风力发电机的设计载荷谱和载荷雨流计数直方图;分析了变风速下风轮叶片主要参数对风力发电机输入载荷的影响规律：推力和扭矩载荷的均值随桨距角变化的响应明显,并随桨距角的增大而变小;推力的波动幅值随桨距角的增大先是增大然后减小,而扭矩的波动幅值则随桨距角的增大而单调减小;推力随叶片扭转角和攻角的变化响应明显而扭矩随扭转角和攻角变化的响应不明显。

英文摘要：

The auto regressive（AR） method is applied to build the model of wind speed in wind field,and with the model,the wind time-history is obtained.The Glauert method is used to calculate time-varying input load,such as the time histories of thrust and torque of the wind turbine under the condition of variational wind speed.Based on statistical analysis,the design loading spectrum and rain flow histogram of the loads are obtained.The effects of wheel blade parameters on the input load under the condition of variational wind speed are analyzed,and the average loads of thrust and torque are obviously affected by the pitch angle.When the pitch angle increases,the loads of thrust and torque both decrease,meanwhile the amplitude of thrust first increases then decreases,while the amplitude of torque decreases monotonously.The thrust is obviously affected by twist and attack angles of blade while the torque is less affected by the twist and attack angles of the blade.The results lay foundations for reliability design,load control of the wind turbine as well as the parameter optimum of the wheel blade aerofoil under the real wind condition.