基于S变换的太原地震监测站洞体应变大风干扰时频特征分析  

Analysis of Time-frequency Characteristics of Gale Interference of Cave Strain Meter Based on S-transform Method

作　　者：孟彩菊[1,3] 张淑亮[2,3] 李丽[2,3] 杨世英[1,3] MENG Cai-ju;ZHANG Shu-liang;LI Li;YANG Shi-ying(Taiyuan earthquake monitoring center station of Shanxi Earthquake Agency, Taiyuan, Shanxi 030025, China;Shanxi Earthquake Agency, Taiyuan, Shanxi 030021, China;National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan, Shanxi 030025,China)

机构地区：[1]山西省地震局太原地震监测中心站,山西太原030025 [2]山西省地震局,山西太原030021 [3]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2021年第3期9-12,共4页Earthquake Research in Shanxi

基　　金：山西省地震局科研项目(SBK-2039)。

摘　　要：因太原地震监测中心站洞体应变观测分钟值数据记录的风扰信号与同震波形相似,为进行两者的特征识别,特选取2020年6月24日该台洞体应变仪与地震计记录的地震及大风波形数据,采用S变换法进行时频特征分析。结果表明,洞体应变仪记录的风扰信号与地震信号时频图像形态相似,频率接近,归一化频率范围均在0.1~0.5之间,不易辨识;在地震计仿真763记录仪上,风扰与地震信号的时频结果存在明显差别,地震信号优势频率范围为0.01~0.2,风扰为0.01~0.02。At Taiyuan seismic monitoring center station,the wind disturbance signal of the minute value data observed by the cave strain meter of is similar to the coseismic waveform.In order to identify the characteristics of the two,the seismic and gale waveform data recorded by the cave strain meter and seismometer on June 24,2020 are selected,and the S-transform method is used to analyze the time-frequency characteristics.The results show that the wind disturbance signal recorded by the cave strain meter is similar to the time-frequency image of seismic signal,the frequency is close,and the normalized frequency range is between 0.1~0.5,which is not easy to identify.On the seismometer simulation 763 recorder,there are obvious differences between the time-frequency results of wind disturbance and seismic signal.The dominant frequency range of seismic signal is 0.01~0.2,and the dominant frequency range of wind disturbance is 0.01~0.02.

关 键 词：形变 洞体应变 S变换 大风干扰 时频特征 

分 类 号：P315.725[天文地球—地震学]