【摘要】 在空间相关性人工地震动生成中,计算的繁杂和局部场地收敛性与幅值收敛性之间存在的矛盾,是时域合成法中的两大主要问题。为了简化计算,同步实现局部场地及地震动幅值的双重收敛性,在对相位角分布进行深入研究的基础上,构建了空间多点人工地震动幅值收敛因子,并采用虚实分离法来分解功率谱矩阵。结果表明,该方法生成的多点人工地震动计算快速,且幅值稳定收敛。更多还原

【Abstract】 In the generation of spatial correlation ground motion,there are two major problems in the time domain method,the complexity of calculation and the contradiction between local convergence and amplitude convergence.In order to simplify the calculation and realize the double convergence,on the foundation of further research about initial random phases,an amplitude convergence factor had been introduced to this paper for the first time.In addition to this,a new method had been introduced to decompose the power spectrum matrix,which separated the imaginary part from the real component.The results show that,with this method,the calculation is faster and the amplitude convergence is stable.更多还原