High frequency errors and instrument corrections of strong-motion accelerograms
High frequency errors and instrument corrections of strong-motion accelerograms
复制标题
强运动加速度图的高频误差和仪器校正
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
A. G. Brady
中科院分区：
文献类型：
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作者：
M. Trifunac;F. Udwadia;A. G. Brady
对数字化加速度图中存在的高频误差进行了研究，并对非等间隔手工数字化数据的分布进行了分析，表明数字化加速度图的傅立叶含量。数据精度可达25cps左右。
A study of high-frequency errors present in digitized accelerograms and an analysis of the distribution of unequally spaced, hand-digitized data indicates that the Fourier content of digitized accelerogram. data may be accurate up to about 25 cps.
Two methods for accelerometer instrument correction are described: (1) a direct numerical differentiation of recorded accelerograms from which high-frequency digitization errors have been filtered out and (2) an ideal "mathematical accelerometer" with a natural frequency significantly higher than the natural frequency of the recording instrument. Although both methods give good results, the first one is recommended for the standard use.