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本文在震源为双侧线状断层破裂模型的假定下，根据震源理论和波谱随空间坐标的展开式，得到 了场地两点地震动Ｆｏｕｒｉｅｒ谱的表达式Ａｂ（ｆ）＝Ａｎ（ｆ）ｅｘｐ（ａ１ｒ０＋ａ２ ）．文中提出了将双侧破裂模型 分解为两个单侧破裂模型计算双侧破裂模型ａ１和ａ２的数值方法．以一次地震（Ｍ＝６）为例，分析了双侧 破裂模型对地震动空间相关性的影响，计算了ａ１和ａ２的实部和虚部以及孔径随震中距、方位角和频率 变化的三维图像．
In this paper, under the assumption that the source is a bilateral linear fault fracture model, the expression of Ab (f) = An (f) exp (f) is obtained from the theory of the source and the expansion of the spectrum with space coordinates. a1r0 + a2). In this paper, we propose a numerical method to decompose the bilateral rupture model into two unilateral rupture models to calculate the bilateral rupture models a1 and a2. Taking one earthquake (M = 6) as an example, the influence of bilateral rupture model on the spatial correlation of ground motion is analyzed. The real and imaginary parts of a1 and a2 and the three-dimensional image.