结构响应与损伤识别敏感性探讨
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摘要
利用小波多分辨分析的特性,研究结构不同位置加速度响应信号对损伤的敏感性问题。通过对一个5层框架结构在不同损伤工况下的数值计算结果表明,不同位置的加速度传感器表征结构损伤特性的能力是不同的,每一传感器只能描述其附近区域结构的工作状态。如果仅利用某一个或者某一些传感器信息进行损伤诊断,就有可能导致错误的诊断结论。只有综合利用多传感器的数据信息,才能使损伤识别更具全局性,才可能准确地识别出结构损伤的发生。
By using wavelet multi-resolution analysis,different acceleration responding signals from different locations of the structure are studied in this paper.Through numerical analysis of a five-layer frame structure,the result shows that the sensors in different location bear different capability in denoting the damage signal.Each sensor could only denote the working status of the surrounding area.Single or some of the sensors may lead to false diagnostic results.It can be concluded that multi-sensors with data fusion method is the effective way to solve the problem of limited information by single sensor.
By using wavelet multi-resolution analysis,different acceleration responding signals from different locations of the structure are studied in this paper.Through numerical analysis of a five-layer frame structure,the result shows that the sensors in different location bear different capability in denoting the damage signal.Each sensor could only denote the working status of the surrounding area.Single or some of the sensors may lead to false diagnostic results.It can be concluded that multi-sensors with data fusion method is the effective way to solve the problem of limited information by single sensor.
引文
[1]焦莉.基于数据融合的结构损伤识别[D].大连:大连理工大学[博士论文],2007
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[8]彭玉华.小波变换与工程应用[M].北京:科学出版社,1999
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[10]Gary G.Yen,Kuo-Chung lin.Wavelet packet feature extraction for vibration monitoring[J].IEEE Transaction on Indus-trial Electronics,2000,47(3):650-667
[11]Z.Sun,C.C.Chang.Structural damage assessment based on wavelet packet transform[J].Journal of Structural Engi-neering,2002,128(10):1 351-1 361
[12]L.H.Yam,Y.J.Yan,J.S.Jiang.Vibration-based damage detection for composite structures using wavelet transformand neural network identification[J].Composite Structures,2003,60:403-412
[13]李国强,李杰.工程结构动力检测理论[M].北京:科学出版社,2002
[2]克拉夫[美].结构动力学[M].王光远译.北京:科学出版社,1981
[3]常春馨.现代控制理论基础[M].北京:机械工业出版社,1988
[4]郭健.基于小波分析的结构损伤识别方法研究[D].杭州:浙江大学,2004
[5]沈小璞,肖卓.高层建筑结构动力时程响应分析的状态空间跌代法[J].建筑结构学报,1998,19(5):8~16
[6]陈荣毅,沈鹏程.结构地震反应的状态空间分析法[J].抗震与抗风,1999(2):36~38
[7]刘明才.小波分析及其应用[M].北京:清华大学出版社,2004
[8]彭玉华.小波变换与工程应用[M].北京:科学出版社,1999
[9]杨福生.小波变换的工程分析与应用[M].北京:科学出版社,2001
[10]Gary G.Yen,Kuo-Chung lin.Wavelet packet feature extraction for vibration monitoring[J].IEEE Transaction on Indus-trial Electronics,2000,47(3):650-667
[11]Z.Sun,C.C.Chang.Structural damage assessment based on wavelet packet transform[J].Journal of Structural Engi-neering,2002,128(10):1 351-1 361
[12]L.H.Yam,Y.J.Yan,J.S.Jiang.Vibration-based damage detection for composite structures using wavelet transformand neural network identification[J].Composite Structures,2003,60:403-412
[13]李国强,李杰.工程结构动力检测理论[M].北京:科学出版社,2002
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