【摘要】 本文在强震地震波频散研究的基础上，进行了强地震动场相位预测方法和多点地面运动时程合成方法的研究。作者首先运用ＳＭＡＲＴ—１台阵资料对强地震波等效频散模型进行了深入研究，发现表示地震动相位随机性的随机过程η（ｆ）的相位服从正态分布，并用此分布取代了原模型中的均匀分布的假定。然后将这一改进的等效频散模型推广应用于强地震动场相位的预测。论文中提出的方法既考虑了相邻点相位的行波相关性，亦考虑了多种复杂因素产生的随机性．最后，利用ＳＭＡＲＴ—１台阵记录，通过合成的地震动场的时程曲线、绝对加速度反应谱和强度包线与相应观测结果的对比，对建议的方法进行了检验，论证了这一方法的可行性，并对今后研究工作作了简要讨论。更多还原

【Abstract】 A method for predicting the phase spectra of strong ground motion is presented based on the equivalent dispersion of wave motion and the approach for synthesizing ground motions is then studied. It is found by studying the model of equivalent dispersion using SMART-1 array records that the phase of the stochastic process η(f),which characterizes the randonmess of the fourier phase of strong ground motion, obeys the normal distribution in the range [0,2π]. The discovery is then used to improve equivalent dispersion model. The improved model is further extended to predict the phase spectra of strong ground motions within a field. Both the deterministic phase relation of adjacent points caused by the traveling wave and the randonmess caused by a number of complex factors are considered in this model. The method is checked by comparing synthesized and observed accelerograms, absolute acceleration spectra and intensity envelopes of ground motion using the SMART-1 array data.更多还原