基于小波分解的框架结构缺陷识别方法

Wavelet-Based Method for Frame Structure Damage Detection

为了检测出框架结构的缺陷 ,在小波分解的基础上 ,通过对脉冲激励下正常和有缺陷的框架结构模型的响应进行分析 ,以输出信号各频带内能量为元素构造一个特征向量 ,对照各层缺陷对应的特征向量来确认结构的缺陷位置。最后 ,实验验证了本文方法的正确性。

In order to detect the frame structure damage, a wavelet decomposition method is adopted. In this work, the response analysis of a frame structure model with and without the damage to the impulsive excitations is made, from which a charactoristic vector is constructed by a set of elements representing the output energy of the structure in each band of frequency. Each damage position corresponds to its own characteristic vector, by which the damage can be located. Experimental results indicate the effectiveness of the method suggested in the paper.