中文摘要：

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。

英文摘要：

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.