| 河北尚义M4.0地震加速度记录时频特性分析 |
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| 引用本文： | 吕国军,张合,李皓,李姜,李胜强.河北尚义M4.0地震加速度记录时频特性分析[J].地震地磁观测与研究,2018,39(6):136-142. |
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| 作者姓名： | 吕国军 张合 李皓 李姜 李胜强 |
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| 作者单位： | 中国石家庄 050021 河北省地震局 |
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| 基金项目： | 河北省地震科技星火计划（项目编号：DZ20170503013） |
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| 摘 要： | 2016年6月23日，河北张家口尚义县发生M 4.0地震，发震构造为尚义-平泉断裂。采用基于聚类经验模态分解（EEMD）的HHT计算方法，对尚义M4.0地震强震动记录进行EEMD分解、Hilbert谱变换及谱分析，得到强震动台站的加速度记录分量的时程、FFT谱和边际谱、瞬时能量谱及时频谱，对比分析并认识各种谱的时频特性及规律，做好灾前预防工作，以减少人民生命财产损失。
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| 关 键 词： | 尚义M4.0地震 聚类经验模态分解 强震动记录 时频特性 |
Analysis of time-frequency characteristics of Seismic acceleration records of Shangyi M4.0 earthquake in Hebei Province |
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| L&#,Guojun,Zhang He,Li Hao,Li Jiang,Li Shengqiang.Analysis of time-frequency characteristics of Seismic acceleration records of Shangyi M4.0 earthquake in Hebei Province[J].Seismological and Geomagnetic Observation and Research,2018,39(6):136-142. |
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| Authors: | L&# Guojun Zhang He Li Hao Li Jiang Li Shengqiang |
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| Institution: | Hebei Earthquake Agency, Shijiazhuang 050021, China |
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| Abstract: | On June 23, 2016, an M4.0 earthquake occurred in Shangyi County, Zhangjiakou, Hebei Province. The seismogenic structure was Shangyi-Pingquan fault. In this paper, a HHT calculation method based on ensemble empirical mode decomposition (EEMD) is used to analyze the EEMD decomposition Hilbert spectrum of the strong motion record of Shangyi M4.0 earthquake. The time-history and marginal spectra of the acceleration record component of the strong seismic station are obtained. The instantaneous energy spectrum is in time frequency spectrum. The time-frequency characteristics of all kinds of spectra are compared and studied, and their laws are recognized, in order to do a better job for pre-disaster prevention and reduce the live and property loss of people. |
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| Keywords: | Shangyi M4 0 earthquake ensemble empirical mode decomposition (EEMD) strong motion record time-frequency characteristic |
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