【摘要】 针对相位差谱具有对数正态分布的特点,选取西部67个强震记录计算了各自相位差谱对数正态分布的均值和标准差,再将其转为正态分布的均值和标准差。将正态分布的均值和相位差看作震级和震中距的函数,选取二元回归模型进行回归分析,得到了均值和标准差随震级和震中距变化的关系式。最后对已知强震记录,将其震级和震中距代入回归方程求出均值和标准差,利用均值和标准差产生的地震动时程与实际记录十分接近。更多还原

【Abstract】 We select 16 strong earthquake records,and calculate their means and standard deviation values of logarithmic normal distribution,and convert them into means and standard deviation values of normal distribution with logarithmic normal distribution character of phase difference spectrum.Means and standard deviation values of normal distribution are taken as function of magnitude and epicentral distance,we select two-dimensional regression model,and get the relation expression between means,standard deviation values and magnitude,epicentral distance.At last,we have means and standard deviation values by putting magnitude and epicentral distance of strong earthquake records into regression equation.The result shows that the ground motion values generated by means and standard deviation values are close to actual records.更多还原