[1]丁幼亮,李爱群,韩晓林.基于小波包分析的结构实时损伤报警数值研究[J].东南大学学报(自然科学版),2003,33(5):643-646.[doi:10.3969/j.issn.1001-0505.2003.05.024]
 Ding Youliang,Li Aiqun,Han Xiaolin.Numerical research on real-time structural damage alarming based on wavelet packet analysis[J].Journal of Southeast University (Natural Science Edition),2003,33(5):643-646.[doi:10.3969/j.issn.1001-0505.2003.05.024]
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基于小波包分析的结构实时损伤报警数值研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第5期
页码:
643-646
栏目:
土木工程
出版日期:
2003-09-20

文章信息/Info

Title:
Numerical research on real-time structural damage alarming based on wavelet packet analysis
作者:
丁幼亮 李爱群 韩晓林
东南大学土木工程学院, 南京 210096
Author(s):
Ding Youliang Li Aiqun Han Xiaolin
College of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
结构损伤 小波包分析 损伤报警
Keywords:
structural damage wavelet packet analysis damage alarming
分类号:
TU311.41
DOI:
10.3969/j.issn.1001-0505.2003.05.024
摘要:
研究了基于小波包分析的结构实时损伤报警技术.利用小波分析优良的时-频局部化特性对结构振动信号进行精细分析,从而能实时地实现结构损伤报警.以简支梁裂缝为例,将环境振动信号采用小波包分解后得到小波包能量谱,采用基于Monte-Carlo方法计算得到的能量谱极值指数和变异指数2个指标作为简支梁裂缝损伤报警的判据.该技术不需要对整体结构进行计算分析,只需要环境振动信号.计算机数值模拟表明该技术能较为敏感地发现简支梁的微小损伤,从而证实了该技术的可行性.
Abstract:
The real-time structural damage alarming technology is studied based on wavelet packet analysis. The structural damage alarming is performed by analyzing structural vibrational signals due to fine-time and frequency resolution of wavelet analysis. With respect to damage beams with open cracks, the energy spectrum of the wavelet packet is obtained with an environmental vibration signal by wavelet packet decomposition. The variation index and maximum index of energy spectrum based on the Monte-Carlo method are presented to judge the occurrence of beam cracks. Its advantage is that this new technique requires measured environmental signals without any analysis of the complete structure. The results obtained in the study show that a short crack can be detected effectively and efficiently, and numerical simulations verify the feasibility of the method.

参考文献/References:

[1] 崔飞.桥梁参数识别与承载能力评估[D].上海:同济大学土木工程学院,2000.
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[3] Wang Q,Deng X.Damage detection with spatial wavelets [J].International Journal of Solids and Structures,1999,36(23):3443-3468.
[4] Gentile A,Messina A.On the continuous wavelet transforms applied to discrete vibrational data for detecting open cracks in damaged beams [J].International Journal of Solids and Structures,2003,40(2):295-315
[5] 贺银芝,沈松,应怀樵,等.小波包分解及其能量谱在发动机连杆轴承故障诊断中的应用[J].振动工程学报,2001,14(1):72-75.
  He Yinzhi,Shen Song,Ying Huaiqiao,et al.Application of wavelet packet decomposition and its energy spectrum on the fault diagnosis of reciprocation machinery [J].Journal of Vibration Engineering,2001,14(1):72-75.(in Chinese)
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相似文献/References:

[1]孙君,李爱群,丁幼亮,等.润扬大桥悬索桥小波包能量谱识别的环境变异性[J].东南大学学报(自然科学版),2009,39(1):91.[doi:10.3969/j.issn.1001-0505.2009.01.017]
 Sun Jun,Li Aiqun,Ding Youliang,et al.Environmental variability of measured wavelet packet energy spectrum for Runyang suspension bridge[J].Journal of Southeast University (Natural Science Edition),2009,39(5):91.[doi:10.3969/j.issn.1001-0505.2009.01.017]

备注/Memo

备注/Memo:
作者简介: 丁幼亮(1979—),男,博士生; 李爱群(联系人),男,博士,教授,博士生导师,aiqunli@public1.ptt.js.cn.
更新日期/Last Update: 2003-09-20