应变能响应分类方法在叶片损伤识别中的应用

bstract: By doing modal analysis of the whole wind turbine system, we can get the first twenty orders natural frequencies and corresponding mode shapes, By analyzing the dynamic characteristics of the blade, the dangerous points of blade were fund. Under rotor rotating excitation in the normal state, blade mass eccentricity states, the strain energy change rates (SECR) of nacelle are obtained. While based on the SECR of nacelle, the methods of strain energy change rate and support vector machine are introduced to indentify locate the mass eccentricity and stiffness damages. The results show that mass eccentricity at different location and in different degree can be efficiency identified by means of support vector machine classification method.