Method for testing high-order frequency of large wind-power blades

The invention discloses a method for testing high-order frequency of large wind-power blades. The method comprises the following steps of: firstly determining a reasonable test point arrangement scheme, exciting the blades by utilizing a high elastic energy-collecting hammer, testing a vibratory response of the blades by utilizing an acceleration sensor, collecting the blade frequency through a data collecting system, and finally recognizing modal parameters of the large wind-power blades through a rear-end server and determining the natural frequency of each order of the large wind-power blades. In the invention, the high-order frequency of the large wind-power blades is tested by using an improved non-weighing method, the characteristic of difficult excitation due to large aspect ratio, big mass, low natural frequency (first-order waving frequency is designed to be lower than 1Hz) of the large wind-power blades is overcome, and the high-order frequency of the large glass-steel wind-power blades more than 40