【摘要】 在汶川8.0级地震中,中国数字强震动台网在19个省市自治区的420个台站获得了1 257条3分量主震加速度记录。文中对这些记录进行了初步的波形分析和数据统计,发现部分记录不完整,即存在不同程度丢头、丢尾的现象。从强震记录的波形特点、仪器的开始/停止触发阈值、事件前/后存储时间分析了出现以上现象的原因,并给出了数字强震仪预存贮参数设置的合理建议。文中研究的初步结果可为今后的数字强震仪参数设置提供参考。更多还原

【Abstract】 In Wenchuan 8.0 earthquake,the 420 stations of China Digital Strong Motion Seismic Network in 19 provinces and autonomous regions have obtained 1 257 three-component acceleration records of the main shock.The preliminary waveform and records are statisted,and the results show that some records are incomplete,leaving out the beginning and the end.From the waveform characteristics of strong motion records,equipment start/ stop trigger thresholds,and before / after event storage time,the reasons for the above phenomenon are analyzed,and the pre-stored reasonable digital strong motion parameters are proposed.The preliminary studied results can provide a reference of setting parameters for the digital strong motion accelerographs.更多还原