基于HHT的输电塔结构损伤识别研究
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摘要
在sap2000中建立模型,采用白噪声为激励信号,在主材上布置若干监测点,进行信号接收。对输电塔在相同位置下发生损伤前后的响应信号应用经验模态分解法(EMD)分解,得到响应信号的各阶本征模态函数,对结构响应信号的各阶固有模态函数用波形因数进行量化。通过对结构损伤前后响应信号本征模态函数的波形因数的对比,可直观地对结构发生损伤进行判断。结果表明,应用该方法可以较好地进行输电塔的损伤识别。
The models were established in the sap2000,and the white noise was taken as the stimulus signal,and numbers of monitoring points were arranged on the primary steels to receive the signal.The empirical mode decomposition(EMD) was used to decompose the response signals of the same position on the transmission tower before and after the damage occurring to obtain each order intrinsic mode function of the response signals.The waveform factor was used to quantify each order intrinsic mode function of the structural response signals.The waveform factors of the intrinsic mode functions of the response signals before and after the structural damage were contracted which could intuitively judge the damage on the structure.The results showed that applying this method can be better to carry out the damage identification of the transmission tower.
The models were established in the sap2000,and the white noise was taken as the stimulus signal,and numbers of monitoring points were arranged on the primary steels to receive the signal.The empirical mode decomposition(EMD) was used to decompose the response signals of the same position on the transmission tower before and after the damage occurring to obtain each order intrinsic mode function of the response signals.The waveform factor was used to quantify each order intrinsic mode function of the structural response signals.The waveform factors of the intrinsic mode functions of the response signals before and after the structural damage were contracted which could intuitively judge the damage on the structure.The results showed that applying this method can be better to carry out the damage identification of the transmission tower.
引文
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[13]YANG J N,LEI Y,LIN S,et al.Hilbert-Huang based ap-proach for structural damage detection[J].Journal of Engi-neering Mechanics,2004 130(1):85-95
[14]赵进平.异常事件对EMD方法的影响及其解决方法研究[J].青岛海洋大学学报,2001,36(6):805-814.
[15]杨智春,于哲春,孙浩.一种基于经验模态分解的结构微小损伤检测方法[J].西北工业大学学报,2005,23(4):422-425.
[2]楼文娟,林宝龙.基于小波变换的大型输电铁塔损伤位置识别[J].工程力学,2006,23(6):157-168.
[3]黄海斌.基于[ΔK]的塔-线结构损伤识别方法[J].工业建筑,2009,39:566-568.
[4]HUANG N E,ZHENG S,LONG S R,et al.The EmpiricalMode Decomposition and Hilbert Spectrum for Nonlinear andNon-stationary Time Series Analysis[J].Proceedings of theRoyal Society of London,Series A,1998,454:903-995.
[5]王学敏,黄方林,陈政清.Hilbert-Huang变换在桥梁振动分析中的应用[J].铁道学报,2005,27(2):81-84.
[6]杜寿昌,梁虹.基于Hilbert-Huang变换的第一心音信号时频分析[J].云南民族大学学报(自然科学版),2004,13(2):95-98.
[7]HUANG N E,ZHENG S,LONG S R.A NewViewof Non-linear Water waves:the Hilbert Spectrum.Annual ReviewFlu-id Mechanics.1999,31:417-457.
[8]公茂盛,谢礼立.HHT方法在地震工程中的应用之初步探讨[J].世界地震工程,2003,19(3):39-43.
[9]陈隽,徐幼麟,李杰.Hilbert-Huang变换在密频结构阻尼识别中的应用[J].地震工程与工程振动,2003,23(4):34-42.
[10]李书进,虞晖,瞿伟廉.基于Hilbert-Huang变换的结构损伤诊断[J].武汉理工大学学报,2004,26(8):44-47.
[11]YANG J N,LEI Y,HUANG N E.System identification oflinear structures based on Hilbert-Huang spectral analysis.Part 1:Normal modes[J].Earthquake Engineering andStructural Dynamics.2003,32(9):1443-1467.
[12]YANG J N,LE Y,PAN I S,et al.System identification oflinear structures based on Hilbert-Huang spectral analysis.Part2:complexmodes[J].Earthquak Engineering and Struc-tural Dynamics,2003(32):1533-1554
[13]YANG J N,LEI Y,LIN S,et al.Hilbert-Huang based ap-proach for structural damage detection[J].Journal of Engi-neering Mechanics,2004 130(1):85-95
[14]赵进平.异常事件对EMD方法的影响及其解决方法研究[J].青岛海洋大学学报,2001,36(6):805-814.
[15]杨智春,于哲春,孙浩.一种基于经验模态分解的结构微小损伤检测方法[J].西北工业大学学报,2005,23(4):422-425.
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