| Hilbert-Huang变换在提取地震信号动力特性中的应用 |
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| 引用本文： | 吴琛,周瑞忠.Hilbert-Huang变换在提取地震信号动力特性中的应用[J].地震工程与工程振动,2006,26(5):41-46. |
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| 作者姓名： | 吴琛 周瑞忠 |
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| 作者单位： | 福州大学,土木工程学院,福建,福州,350002 |
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| 基金项目： | 教育部博士点专项科研基金项目（20040386004） |
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| 摘 要： | H ilbert-Huang变换(HHT)是一种处理非线性、非平稳信号的新方法。它通过经验模态分解将信号分解为有限个固有模态函数,并对每个固有模态函数进行H ilbert变换得到H ilbert谱。本文将这种方法应用于地震信号动力特性的提取,有效地获得了信号能量的时频分布,量化提取了中心频率、瞬时相位、瞬时能量、H ilbert能量、最大振幅对应的时频分布等动力特性,并与Fourier变换、小波变换等进行了比较,显示了HHT的优势以及对于进一步实现结构分析和控制的重要意义。
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| 关 键 词： | Hilbert-Huang变换 经验模态分解 固有模态函数 动力特性 Hilbert谱 |
| 文章编号： | 1000-1301（2006）05-0041-06 |
| 收稿时间： | 2006-03-20 |
| 修稿时间： | 2006-03-202006-06-06 |
Application of Hilbert-Huang transform in extracting dynamic properties of seismic signals |
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| Wu Chen,Zhou Ruizhong.Application of Hilbert-Huang transform in extracting dynamic properties of seismic signals[J].Earthquake Engineering and Engineering Vibration,2006,26(5):41-46. |
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| Authors: | Wu Chen Zhou Ruizhong |
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| Institution: | College of Civil Engineering, Fuzhou University, Fuzhou 350002, China |
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| Abstract: | Hilbert-Huang transform(HHT) is a new method for dealing with non-linear and non-stationary data.By using this method,any signals can be decomposed into a finite number of intrinsic mode functions(IMF) and then Hilbert spectrum is obtained by Hilbert transform.In this paper,the new method is used in extracting dynamic properties of seismic signals.The energy time-frequency distribution can be effectively acquired.Several dynamic properties,such as center frequency,instantaneous phase,instantaneous energy,Hilbert energy and time-frequency distribution with respect to maximum amplitude are extracted.In addition,by comparing HHT with Fourier transform and wavelet transform,the advantage of HHT and its considerable significance for structural analysis& structural control are shown. |
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| Keywords: | Hilbert-Huang transform Empirical mode decomposition Intrinsic mode function Dynamic property Hilbert spectrum |
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