方向性裂缝对梁式结构曲率模态的影响研究

STUDY ON EFFECT OF DIRECTIONAL CRACK ON CURVATURE MODE OF BEAM

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。

Compared with the common finite element model in most documents related to curvature mode method applying in damage identification,an improved model with directional crack is presented.Both effects of these two models to curvature mode are tested,which shows that directionality of crack can't be ignored in such study.The results are helpful to study on relation between damage types and damage identification parameters.