针对利用曲率模态进行损伤识别的研究中普遍使用的数值研究模型—刚度下降法模拟损伤有限元模型提出了改进意见,即用有方向性裂缝存在的模型取代刚度下降模型,并进行了曲率模态研究对比,得出裂缝方向性在曲率模态的应用中不宜忽略的结论,有助于推进损伤识别参数和实际损伤类型联系的研究。 A numerical study model commonly used in the study of damage identification using curvature modal - the stiffness reduction method is proposed to simulate the damage finite element model. The improvement suggestion is that the stiffness reduction model is replaced by the model with directional cracks and the curvature model It is concluded that the fracture directivity should not be neglected in the application of the curvature modal. It is helpful to promote the connection between the damage identification parameters and the actual damage types.