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用高台宽频带数字资料研究气流扰动对地脉动的干扰影响

Liang YIN,Zhi-wen YIN,Bi-xian WANG,Ya-hong WANG,Dian-feng SUN

China Earthquake Engineering Journal（2016）

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Abstract
通过对高台宽频带数字资料在数次冷空气过程时段地脉动幅度及频谱变化的分析,在时间域和频率域上研究冷空气过程的干扰特征, 发现冷空气过程时段,地脉动记录曲线会出现大周期扰动或抖动式畸变;随着冷空气过程开始到结束,0.001~0.005 Hz的频幅最大值出现较大变化,进程上具有上升、达到最大值、逐渐回复的特征,降温幅度最大则扰动幅度达到最高值.
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Key words
air current,cold air,microtremor,disturbance,spectrum analysis
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