东南大学学报（自然科学版）2011，Vol.41Issue(4)：824-828,5.DOI:10.3969/j.issn.1001-0505.2011.04.032
面向结构损伤预警的小波包能量谱识别参数
Parameters for identification of wavelet packet energy spectrum for structural damage alarming
摘要
Abstract
The damage alarming analysis based on wavelet packet energy spectrum was performed with regard to the experimental data of Benchmark steel frame structure and online monitoring data of Runyang Suspension Bridge, and on the basis of which the damage alarming effects using various wavelet functions and wavelet packet decomposition levels were investigated in detail. Results reveal that the Daubechies wavelet functions and Coiflets wavelet functions are applicable to structural damage alarming and in real applications the higher order of wavelet function is preferred to obtain better resolution in time domain and damage alarming capacity. In addition, the higher the wavelet packet decomposition level is, the better the resolution in frequency domain and damage alarming capacity will be. The analysis results of Runyang Suspension Bridge reveal that with the increase of the wavelet packet decomposition level, the evaluation index has remarkable seasonal correlation with the environmental temperature and there is a significant annual change in the evaluation index. Thus, in real applications the higher decomposition level is preferred.关键词
结构损伤预警/小波包分析/小波包能量谱/小波函数/小波包分解层次Key words
structural damage alarming/ wavelet packet analysis/ wavelet packet energy spectrum/ wavelet function/ wavelet packet decomposition level分类
建筑与水利引用本文复制引用
丁幼亮,李爱群,邓扬..面向结构损伤预警的小波包能量谱识别参数[J].东南大学学报（自然科学版）,2011,41(4):824-828,5.基金项目
国家自然科学基金资助项目(50808041,50978056) （50808041,50978056）
教育部博士点基金新教师资助项目(200802861011). （200802861011）
