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采用多阶振型和有限差分联立的混合法，依据北京西集一郎府地区的地质条件，模拟了１９７６年唐山地震所引起的该区的剪切波运动；计算了工程上常用的峰值加速度和总能量．在夏垫断裂两侧的最大振幅和总能量的差异分别为２００％和７００％，研究结果可以解释唐山地震时西集一郎府一带所观测到的异常烈度．
The shear wave motion in this area caused by the Tangshan earthquake in 1976 was simulated according to the geological conditions of the Yilangfu area in Beijing, using the hybrid method of multi-order mode and finite difference simultaneous set-up. The common peak acceleration And total energy. The differences in maximum amplitude and total energy between the two sides of the summer pad are 200% and 700%, respectively. The results of this study can explain the observed anomalous intensities of the Xiyi-Ilang-Fudu area during the Tangshan earthquake.