风力发电机在运行过程中,环境侵蚀引起的叶片损伤不易直接观测.利用ANSYS Workbench对含不同损伤位置、不同损伤程度的15KW风力机叶片进行有限元识别分析.分析结果表明:通过叶片自振频率的变化能对其是否发生损伤及损伤程度进行识别,但不能对损伤位置进行定位;通过叶片位移模态及应变模态的变化均可对其损伤程度及位置进行识别.%During running process of the wind turbine, it is not easy to directly observe blade damages caused by environmental erosion.By the ANSYS Workbench, finite element identification analysis on blades of a 15 KW wind turbine was carried out, which were damaged at different positions and to different degrees.It is shown in the analytic results that variations in natural vibration frequency of a blade could be used to determine whether it was damaged as well as the damage degree, but the damage position could not be positioned by it;damage degrees and positions could be identified according to displacement modal variations and strain modal variations of the blades.
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