河北遥测台网FBS-3B地震计工作周期和阻尼变化的特点及原因分析

ANALYSIS OF FBS-3B SEISMOMETER'S WORK PERIOD AND DAMP IN HEBEI DIGITAL SEISMIC NETWORK

摘要: 以河北台网部分台站使用的FBS-3B地震计的为研究对象,选定一段时期的标定数据进行计算统计,得出该地震计工作周期和阻尼偏差变化的特点和规律,结合理论和实践,分析产生这些偏差的原因以及对地震计幅频特性的影响,结果表明,外界环境特别是温度的变化会使FBS-3B地震计工作周期和阻尼出现一定偏差,进而影响地震计幅频特性。

Abstract: The working period and damp of FBS-3B seismometer in Hebei digital seismic network are analyzed on basis of calibration data in two years, and the deviation characteristics are obtained.The causes of these deviation characteristics and their affect on the amplitude-frequency characteristics are studied.The results show that external environment, particularly the temperature, is the main cause that lead to the deviation of the working period and damp, and then impact the amplitude-frequency.