国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

After the wind turbine blade vibration identification experimental platform set up, the blade vibration response data is collected. Then the self-cross spectrum density method is used to identify model parameters of wind turbine blade before and after damaged. Which is found by contrasting experimental data that wind turbine blade structural damage will cause its frequency to a certain degree of decline, and the degree of frequency decreased become greater with the increase of damage degree. Axial mode difference method is used to fix a position on the blade damage. Structural damage of wind turbine blade is completed under laboratory conditions.