[1]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.[doi:10.3969/j.issn.1001-0505.2011.04.032]
 Ding Youliang,Li Aiqun,Deng Yang.Parameters for identification of wavelet packet energy spectrum for structural damage alarming[J].Journal of Southeast University (Natural Science Edition),2011,41(4):824-828.[doi:10.3969/j.issn.1001-0505.2011.04.032]
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面向结构损伤预警的小波包能量谱识别参数()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第4期
页码:
824-828
栏目:
土木工程
出版日期:
2011-07-20

文章信息/Info

Title:
Parameters for identification of wavelet packet energy spectrum for structural damage alarming
作者:
丁幼亮李爱群邓扬
(东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096)
Author(s):
Ding YouliangLi AiqunDeng Yang
(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China)
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
Keywords:
structural damage alarming wavelet packet analysis wavelet packet energy spectrum wavelet function wavelet packet decomposition level
分类号:
TU311.41
DOI:
10.3969/j.issn.1001-0505.2011.04.032
摘要:
对Benchmark钢框架结构试验数据和润扬大桥悬索桥监测数据进行了小波包能量谱损伤预警分析,在此基础上详细考察了不同小波函数和小波包分解层次的损伤预警效果.结果表明:Daubechies小波和Coiflets小波适用于结构损伤预警,并且实际工程中应采用较大的小波函数阶次以获取较好的时域分辨能力和损伤预警能力; 小波包分解层次愈大,小波包能量谱的频域分辨能力和损伤预警能力愈强.润扬大桥悬索桥的实测分析表明,随着小波包分解层次的增加,特征频带能量比与温度保持明显的季节相关性,其年变化更为明显.因此,实际工程应用中应尽量选择较大的小波包分解层次.
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.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介:丁幼亮(1979—),男,博士,副研究员,civilding@163.com.
基金项目:国家自然科学基金资助项目(50808041,50978056)、教育部博士点基金新教师资助项目(200802861011).
引文格式: 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.[doi:10.3969/j.issn.1001-0505.2011.04.032]
更新日期/Last Update: 2011-07-20