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。
Taking the acceleration recording of Ludian MS6.5 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 MS6.5 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.
作者
刘琼仙
邱志刚
杨黎薇
林国良
LIU Qiongxian QIU Zhigang YANG Liwei LIN Guoliang(Earthquake Administration of Yunnan Province, Kunming 650224, Yunnan, China Kunming University, Kunming 650000, Yunnan, China)
出处
《地震研究》
CSCD
北大核心
2016年第4期613-621,共9页
Journal of Seismological Research
基金
国家自然科学基金--基于竖向台阵记录数据的强震动作用下土非线性动力特征的实证研究(51578514)资助
关键词
鲁甸地震
频率非平稳特性
持时
穿零特性
Ludian earthquake
characteristic of non-stationarity frequencies
duration
the crossing-zero rates
