考虑幅值谱与相位谱的人造地震动模拟与反应谱拟合

Generation of Response-Spectrum-Compatible Ground Motions Consider the Phase Spectrum and the Amplitude Spectrum

本文根据反应谱、功率谱和傅里叶幅值谱间的数学关系以及三角级数迭加来模拟地震动加速度,并通过对6s以后反应谱曲线的设定和对幅值谱与相位谱的调整,得出了可较好地拟合目标反应谱的地震动加速度时程。对修正分量的个数、调整相位谱的条件、幅值谱与相位谱迭代修正顺序亦做了研究,讨论了幅值谱与相位谱调整的效果,给出了具体拟合的建议。

Based on the relationships of the response spectrum, power density spectrum and Fourier amplitude spectrum, triangle series superposition method is used to generate the acceleration of ground motions in this paper. Suggesting the response spectrum shape which corresponds to the long period part （ longer than 6s）, as well as adjusting the phase spectrum and the amplitude spectrum, the generated ground motions can match the target response spectrum better. Furthermore, there are some useful conclusions about how to determine the number of adjusted component, the condition of adjusting the phase spectrum, sequence of the phase spectrum and the amplitude spectrum adjusting.