吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (5): 1562-1571.doi: 10.13278/j.cnki.jjuese.201705304
张雪冰, 刘财, 刘洋, 王典, 勾福岩
Zhang Xuebing, Liu Cai, Liu Yang, Wang Dian, Gou Fuyan
摘要： 在分析地震资料时，因吸收和衰减等原因，地震信号往往呈现出非稳态性。时频分解方法能将地震信号分解成多个稳态的子成分，从而为描述和分析地震信号的属性提供了便利，如短时傅里叶变换、小波分析、经验模式分解（EMD）等方法。本文引入了一种新的时频分析方法——局部均值分解（LMD）。该方法将地震信号按其时频属性分解成多个乘积分量信号（PFs），较EMD分解所得的固有模态函数（IMFs）保留了更多的局部信息，同时模态混叠效应更少。对模型数据和实际数据的处理结果验证了LMD方法能够合理地分解地震信号，更准确地描述地震资料中不同时间尺度的构造信息，为进一步的地震数据处理和解释提供参考。
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