强震加速度记录的数据处理方法
METHOD OF DATA PROCESSING FOR STRONG MOTION ACCELEROGRAMS
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摘要: 本文用数值积分法,对RDZ1-12-66型自动触发电流计记录式强震仪的幅频响应失真进行校正。并采用高通数字滤波的方法,修正加速度图的零线.为此编制了计算机程序,绘制了修正后的加速度、速度和位移时程曲线.计算了修正前后加速度图的傅氏谱。同时,对这些结果加以讨论。 修正后的加速度图,精确地表示了仪器基本频带在0.09HZ和25HZ之间的绝对地面加速度。Abstract: In this paper, a method of numerical integration is presented for data processing of strong motion accelerograms in the correction of distorted amplitude frequency response obtained by the type RDZI-12-66 automatic triggering accelerograph, galvanometrically recorded. The zero base-line correction of an accelerogram is done by means of a high pass digital filter and a computer program is compiled for this purpose. The duration traces of the corrected acceleration, velocity and displacement are respectively plotted. The Fourier spectra of the accelerograms before and after correction are calculated and discussed.The corrected accelerograms can accurately represent the absolute ground acceleration within the frequency band of 0.09 cps and 25 cps of the instrument.
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