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结构出现裂缝时,动力特性发生变化.本文通过寻找反映裂缝特性的结构总刚矩阵的变化ΔK,直接求得裂缝引起的结构的特征值及特征向量的改变量,为有缝结构动力特性研究提供了一个简单可行的方法.
When the structure appears cracks, the dynamic characteristics change. This paper finds the change ΔK of the structure total rigidity matrix reflecting the crack characteristics, and directly obtains the structural eigenvalue and the change of the eigenvector caused by the crack, and provides the dynamic characteristics of the joint structure. A simple and feasible method.