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。
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.
2018,39(6): 136-142 收稿日期：2018-08-10
DOI：10.3969/j.issn.1003-3246.2018.06.020
基金项目：河北省地震科技星火计划（项目编号：DZ20170503013）
作者简介：吕国军(1985-),男,本科,河北邯郸人,工程师,主要从事工程地震研究工作。E-mail:13483188538@163.com
*通讯作者：张合(1979-),男,高级工程师,主要从事地震强震动处理工作
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