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本文详细地研究了电流计记录式加速度仪的频率响应失真对强震加速度记录的影响,提出了对失真记录进行校正的两种方法:假想摆法和微分-积分法。计算与实验结果表明:这两种方法都能给出满意的结果,均可推广使用。作为实例,对1976丰11月15日宁河地震(M_L:7.1)的强震加速度记录进行了校正,最大校正量(幅值)达35％。此外,还对比了由失真加速度记录和校正加速度记录计算的位移曲线,表明这种校正工作对获得准确的地震位移曲线是十分必要的。
In this paper, the influence of the frequency response distortion of the accelerometer accelerometer on the acceleration records of strong earthquakes is studied in detail. Two methods to correct the distortion records are put forward: the imaginary pendulum method and the differential-integral method. The calculation and experimental results show that both methods can give satisfactory results and can be used widely. As an example, the strong acceleration record of the 1976 Ningfeng earthquake (M_L: 7.1) on November 15 was corrected with a maximum correction (amplitude) of 35%. In addition, the displacement curves calculated from the records of the acceleration of distortion and the records of correction acceleration are compared, which shows that this kind of correction work is very necessary to obtain the accurate seismic displacement curve.