摘要
应用快速傅里叶变换方法,对新疆榆树沟台2012-2013年伸缩仪、水管仪、气压及降水量等分钟值资料进行整理分析,从频域角度初步探讨和分析短周期气压变化和降水因素对该台形变资料的影响。频谱分析结果表明：1在气压平稳情况下,气压与伸缩仪、水管仪的频谱相对独立,周期趋于分散、频谱幅度小;2在短周期气压变化情况下,气压与伸缩仪、水管仪的频谱在周期为56-73min频段上表现出较好的相关性;3降水使得伸缩仪和水管仪频谱幅度明显增大,是影响榆树沟台伸缩仪和水管仪的主要因素。
By using FFT, we collate minute-value of tensometer, water tube tiltmeter, atmospheric pressure and rainfall observation data in Yushugou station, and analyze influences of short-period pressure variations and rainfall for deformation data . The results show： （ 1 ） pressure and tensometer,water tube tilt meter were independent, and the periods are relatively dispersed, the spectrum amplitude are relatively small under the condition of stable atmospheric pressure period ; （2） under short-period pressure variations, pressure has a certain correlation with tensometer, water tube tilt meter at periods from 56 to 73 minute ; （3） the rainfall makes spectrum amplitude of tensometer and water tube tihmeter be larger, and it is major factors influencing tensometer and water tube tilt meter observation.
出处
《内陆地震》
2015年第2期181-188,共8页
Inland Earthquake
关键词
榆树沟
形变
伸缩仪
水管仪
傅里叶变换
频谱特征
Tensometer
Water tube tilt meter
Fast Fourier Transformation
Spectrum characteristics
