基式地震仪（SKZ）初动特性分析

本文通过计算基式地震仪（SKZ）对于不同形态和不同初始斜率的14种归一化地震信号的响应,说明地震仪的初动特性与地震信号有很大关系。作者建议用伯拉格（Berlage）函数近似远场地动位移,并由基式地震仪的时间特性和伯拉格函数褶积计算出仪器响应。对于频率不同的伯拉格函数得出了仪器的初动特性。最后指出,用与初动分析相同的方法去分析所谓二动、三动特性,没有普遍使用意义。

ANALYSIS OF INITIAL MOTION CHARACTERISTIC OF THE SKZ SEISMOGRAPH

On the basis of the calculation of the response of the SKZ seismograph to 14 types of normalized seismic signals with various forms and various initial slopes it is shown that the initial motion characteristic is related largely to seismic signal.In this paper it is recommended that Berlage function can be used to approximate the far-field earth displacement, and the instrument response is calculated by using convolution of its time characteristic and Berlage function. For various frequencies of Berlage function initial motion characteristic of the SKZ seismograph is obtained.