西北地震学报2012，Vol.34Issue(4)：335-341,358,8.DOI:10.3969/j.issn.1000-0844.2012.04.0335
2011年四川炉霍Ms5.3地震加速度记录的时频分析与能量计算
Time-frequency Analysis and Energy Calculation for Acceleration Records of Luhuo Ms5.3 Earthquake in Sichuan Province in 2011
摘要
Abstract
Luhuo MS5. 3 earthquake occurred in Sichuan on April 10, 2011. In this paper three components of acceleration time history records acquired by different stations with different epicenter distances are selected. Aimed at the problem in HHT method in the decomposition of EMD which is present common way for extracting the signal time-frequency characteristics, a EEMD method is used and the energy calculation and time-frequency analysis on acceleration records are made. The method can not only effectively restrain the problem occurred in EMD decomposition process,but also can extract record's time-frequency characteristics and the energy concentration distribution bands. Comparative study among this method and Fourier transform and wavelet analysis is made. The validity and practicability of the method are proved in dealing with the unsmooth, nonlinear strong signal, and has a good prospect in earthquake data processing area.关键词
聚类经验模态分解(EEMD)/希尔伯特黄变换(HHT)/加速度记录/时频特性/瞬时能量谱/四川炉霍Ms5.3地震Key words
Ensemble Empirical Mode Decomposition (EEMD)/ Hilbert-Huang Transform (HHT)/ acceleration records/ Time-frequency characteristics/ Instantaneous energy spectrum分类
天文与地球科学引用本文复制引用
李大虎,梁明剑,黎小刚,顾勤平..2011年四川炉霍Ms5.3地震加速度记录的时频分析与能量计算[J].西北地震学报,2012,34(4):335-341,358,8.基金项目
国地震局地震科技星火计划项目(XH12041Y) （XH12041Y）
地震行业科研专项(201008006) （201008006）
