基于S变换的离石台形变观测数据时频特征分析  

Time Frequency Characteristics Analysis of Deformation Observation Data at Lishi Central Seismic Station Based on S-transform

作　　者：高翠珍[1,2] 王晓霞[1,2] 孟彩菊[1,2] 安凯杰 薛锦明[1,2] 薛生瑞 方燕勋[3] GAO Cui-zhen;WANG Xiao-xia;MENG Cai-ju;AN Kai-jie;XUE Jin-ming;XUE Sheng-rui;FANG Yan-xun(Taiyuan earthquake monitoring central station of Shanxi Earthquake Agency, Taiyuan, Shanxi 030025, China;National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan, Shanxi 030025, China;Zhejiang Earthquake Agency, Hangzhou, Zhejiang 310013, 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]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 [3]浙江省地震局,浙江杭州310013

出　　处：《山西地震》2021年第2期6-9,39,共5页Earthquake Research in Shanxi

基　　金：山西省地震局科研项目(SBK-2001);中国地震局监测、预报、科研三结合课题(3JH-2021021)联合资助。

摘　　要：选取离石台洞体形变观测中受大风、气压干扰以及地震波影响的典型观测数据,采用S变换,分析并讨论这些干扰信号的时频响应特征。结果表明,风扰对水平摆倾斜仪影响较明显,水平摆倾斜仪和水管倾斜仪均表现为高频干扰,洞体应变仪集中在低频扰动区域;气压干扰主要分布在低频区域,且对伸缩仪的影响较大;地震波影响中主要记录的是高频地震波。同时,3种干扰信号的时频域频率、能量强度随时间变化趋势与数据观测时域变化趋势相一致。Based on the observation data of cave deformation at Lishi central seismic station,which are affected by gale,air pressure and seismic wave,S-transform is used to analyze the time-frequency response characteristics of interference signal.The results show that wind disturbance has a significant influence on the horizontal pendulum tiltmeter,and both the horizontal pendulum and the water pipe inclinometer are high frequency interference,and the hole strain gauge is concentrated in the low frequency disturbance area.The air pressure interference is mainly distributed in the low frequency area,which has a great influence on the extensometer.The main record of seismic wave is high frequency seismic wave.Meanwhile,the time-frequency frequency and energy intensity of the three kinds of interference signals are in accordance with the time-domain trend of data observation.

关 键 词：干扰 洞体形变 时频特征 

分 类 号：P315.63[天文地球—地震学]