【摘要】 风力机叶片在运行过程中受多种载荷作用会产生变形，且偏航导致叶片的受力情况更加复杂。为探究偏航工况下叶片动态挥舞变形情况，文章利用数字图像相关技术（DIC）开展实验，寻找偏航角、风速、转速的变化对叶片动态挥舞变形的影响规律。实验结果表明：水平轴风力机叶片的动态挥舞变形呈正弦规律变化，风速越大，动态挥舞变形越大；转速越大，动态挥舞变形增大的同时，到达最大值所用时间也越短，经历的变化周期越多；偏航角的存在改变了叶片的受力情况，偏航角越大，动态挥舞变形有增大趋势，到达峰值所用时间越短，峰值位置提前，同时正向动态挥舞变形占比减少，负向动态挥舞变形占比增多，30°偏航角时最明显。更多还原

【Abstract】 Wind turbine blades are subjected to various loads during operation, which can cause deformation, and yaw can make the force situation of the blades more complex. To investigate the dynamic flapping deformation of blades under yaw conditions, experimental research was conducted using digital image correlation(DIC) technology to explore the influence of changes in yaw angle, wind speed, and speed on the dynamic flapping deformation of blades. The results show that the dynamic flapping deformation of horizontal axis wind turbine blades varies in a sinusoidal pattern, and the higher the wind speed, the greater the dynamic flapping deformation.The higher the rotational speed, the greater the dynamic flapping deformation, and at the same time, the time it takes to reach the maximum value is also shorter, with more variation cycles experienced; The existence of yaw angle changes the force situation of the blade. The larger the yaw angle, the greater the trend of dynamic flapping deformation. The shorter the time it takes to reach the peak, the earlier the peak position is. At the same time, the proportion of positive dynamic flapping deformation decreases, and the proportion of negative dynamic flapping deformation increases. The most obvious trend is at a 30° yaw angle. The research results of this article can provide experimental data support for effective control of blade deformation and subsequent research on the impact of blade deformation on the aerodynamic characteristics of wind turbines.更多还原