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利用华北北部近２０多年的地震测深资料进一步深化分析解释，结合其它地质、地球物理资料，给出地壳分层结构，求得弹性力学参数，得到三维有限单元的地壳模型．参考区域构造应力场，在考虑重力影响的情况下，对模型边界作适当约束，利用线弹性三维有限单元程序进行各节点位移和各单元应变、应力计算．通过分析上、中、下地壳各层的最大主压应力等值线图，探讨地壳应力场的分布特征与地震的关系．
Using the seismic sounding data of north of North China for more than 20 years to further deepen the analysis and explanation, combined with other geologic and geophysical data, the crustal layered structure is given and the elastic mechanics parameters are obtained to obtain the three-dimensional finite element crustal model. In the reference area, the stress field is constructed. Under the influence of gravity, the boundary of the model is properly constrained. The linear elastic three-dimensional finite element program is used to calculate the displacement of each node and the strain and stress of each element. Through the analysis of the contour maps of the maximum principal compressive stress in the upper, middle and lower crust layers, the relationship between the distribution of the crustal stress field and earthquakes is discussed.