[1]周仰新,李永强,许言,等.基于HHT的典型红土区地脉动特性与场地特征关联性研究[J].福建理工大学学报,2024,22(01):16-21.[doi:10.3969/j.issn.2097-3853.2024.01.003]
 ZHOU Yangxin,LI Yongqiang,XU Yan,et al.Study on correlation between microtremor characteristics and site characteristics in typical laterite areas based on HHT[J].Journal of Fujian University of Technology;,2024,22(01):16-21.[doi:10.3969/j.issn.2097-3853.2024.01.003]
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基于HHT的典型红土区地脉动特性与场地特征关联性研究
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《福建理工大学学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第22卷
期数:
2024年01期
页码:
16-21
栏目:
出版日期:
2024-02-25

文章信息/Info

Title:
Study on correlation between microtremor characteristics and site characteristics in typical laterite areas based on HHT
作者:
周仰新李永强许言刘旭锋陈波
东华理工大学
Author(s):
ZHOU Yangxin LI Yongqiang XU Yan LIU Xufeng CHEN Bo
School of Civil and Architecture Engineering, East China University of Technology
关键词:
地脉动场地特征HHT卓越周期红土区
Keywords:
microtremor site characteristics HHT predominant period laterite areas
分类号:
P631
DOI:
10.3969/j.issn.2097-3853.2024.01.003
文献标志码:
A
摘要:
对典型红土场地开展系统的地脉动测试,基于希尔伯特-黄变换(hilbert?huang transform,HHT)中的经验模态分解(empirical mode decomposition,EMD)从测试信号中分解出场地有效地脉动信号,对其进行快速傅里叶变换(fast fourier transform,FFT) 和Hilbert 变换,产生功率谱曲线和Hilbert 边际谱曲线,以确定场地卓越周期,进而探索与直接傅氏法和H / V 谱比法不同的场地特征参数判别方法。目标场地的有效地脉动信号为EMD 分解后的第4 个本征模态函数( 4th intrinsic mode function,IMF4),对各个测点的IMF4 进行FFT 和Hilbert 变换,获取的地脉动卓越周期水平向在0.20~0.36 s,垂直向在0.23~0.39 s,结果表明,基于HHT 的地脉动测试法来确定场地类别、划分场地岩土类型,与场地钻孔分析结果一致性高,关联性强。
Abstract:
A systematic microtremor measurement was conducted on typical laterite sites. The empirical mode decomposition (EMD) in Hilbert Huang transform (HHT) was used to decompose the effective microtremor signals from the measurement signals. Fast Fourier transform (FFT) and Hilbert transform were used to ge-nerate power spectral curves and Hilbert marginal spectral curves of the effective microtremor signal to determine the predominant period of the site, and then to explore methods for determining site characteristic parameters that are different from the direct Fourier methods and H/V spectral ratio methods. The effective microtremor signal of the target site is the fourth intrinsic mode function (IMF4) derived from EMD. The predominant period of microtremor obtained by FFT and Hilbert transformation on the IMF4 of each measurement point ranges from 0.20~0.36s in the horizontal direction and from 0.23~0.39s in the vertical direction. Such results indicate that the determination of site classification and division of geotechnical types through microtremor measurement based on HHT is highly consistent and correlated with the drilling results of the site.

参考文献/References:

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更新日期/Last Update: 2024-02-25