论文部分内容阅读
本文选用1981年以来广西各地震台利用分段标定法测定的 DD-1仪动态放大倍数的资料,计有102个分向共1734个不同频率下的动态放大倍数数据,求得平均频率特性,并与理论公式计算的频率特性比较,结果两种方法求得的频率特性吻合很好。从用1秒时的放大倍数及频率特性推算的动态放大倍数与实际标定的放大倍数的偏差统计看,若不考虑频率大于10Hz 或低于0.5Hz 的部分,则推算的放大倍数有用率达98.5%以上,85%以上的放大倍数数据偏差小于5%。由此看,使用频率特性推算的动态放大倍数是可行的。
In this paper, the data of DD-1 dynamic magnification measured by seismic stations in Guangxi since 1981 have been used, and the dynamic magnification data of 102 points with a total of 1734 different frequencies have been calculated to obtain the average frequency characteristics, Compared with the frequency characteristics calculated by the theoretical formula, the frequency characteristics obtained by the two methods are in good agreement. Statistics from the deviation between the dynamic magnification estimated with the magnification and frequency characteristics at 1 second and the actual magnification of the magnification shows that if the frequency is greater than 10 Hz or less than 0.5 Hz, the estimated magnification usefulness is 98.5 %, More than 85% of the magnification data deviation is less than 5%. In view of this, it is feasible to use the dynamic magnification estimated from the frequency characteristics.