摘要
本文研究了悬臂板的裂纹检测问题,提出了特征参数与加权特征参数法.所提利用故障结构的一阶特征对及无裂纹时的刚度阵与质量阵,确定结构裂纹位置的方法,既可用于简单的结构元件,也可用于复杂结构.算例与实验表明,所提方法可行.
In this paper, crack detection of a cantilever plate with crack is studied on the basis of a finite element model developed by authors[3]. The eigenparameter and weighted eigenparameter method to determine crack location in the cantilever plate are proposed. Because only the local stiffness will be varied due to the local damage, a method named Drift Vector is developed. In this method only the first eigencouple of damaged system and mass, stiffness matrices of undamaged system are used to judge the damage location, it is suitable for not only simple but also complex structure. The results of computation and specimen test show that the proposed methods to determine the crack location are feasible.
出处
《应用力学学报》
CAS
CSCD
北大核心
1992年第1期44-53,137,共10页
Chinese Journal of Applied Mechanics
