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Title:: Non-stationarity Correlation Analysis on Strong Motion Frequency of Ludian M_S6.5 Earthquake in 2014

作者:: 刘琼仙¹; 邱志刚²; 杨黎薇¹; 林国良¹; (1.云南省地震局,云南昆明 650224; 2.昆明学院城乡建设与工程管理学院,云南昆明 650000)

Author(s):: LIU Qiongxian¹; QIU Zhigang²; YANG Liwei¹; LIN Guoliang¹; (1.Earthquake Administration of Yunnan Province,Kunming 650224,Yunnan,China)(2.Kunming University,Kunming 650000,Yunnan,China)

Keywords:: Ludian earthquake; characteristic of non-stationarity frequencies; duration; the crossing-zero rates

摘要:: 以2014年云南鲁甸6.5级地震的加速度记录为研究样本,分别对强震动三分量的加速度时程进行持续时间与穿零率分析,通过对三分量记录间频率特性差异的研究,总结了鲁甸6.5级地震中强震动记录三个分量的相对峰值持时离散特点,以及穿零率随震中距的走势特征,侧重分析了强震动频率的非平稳变化。

Abstract:: Taking the acceleration recording of Ludian M_S6.5 earthquake on Aug.3,2014 in Yunnan province as the studying samples,we analyzed duration time and the crossing-zero rates on its three-component acceleration history of strong motion respectively.After studying the frequency characteristic differences of the three-component recordings,we summarized the duration dispersion characteristic of the relative peak value of the three-component strong motion recording of Ludian M_S6.5 earthquake,and the trend variation of zero crossing rate with epicenter distance.Finally,we focus on analyzing the non-stationarity variation of the frequency of strong motion.