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根据地学断面资料建立地壳结构模型，以精密水准测量数据为检验标准，在水平力和垂直力为边界力学条件下，对海城地震区震前地壳内部的构造应力场用二维线弹性有限元法进行数值模拟计算。设计了３种受力方案，分析了模拟计算结果，结合震源机制解等实际资料，选出最佳方案模型，讨论了海城７．３级地震前震源的力学和构造环境及应力场演化特征
The crustal structure model was established based on geology and cross-section data. Based on the precision leveling data, under the condition of horizontal and vertical force as the boundary mechanics, the tectonic stress field inside the crust before the earthquake in Haicheng earthquake area was simulated by two-dimensional linear elastic finite element Method for numerical simulation. Three kinds of stress schemes are designed, the simulation results are analyzed, combined with the actual data of focal mechanism solution, the best scheme model is selected, and the mechanical and tectonic environment and stress field evolution characteristics of the source before the MS 7.3 Haicheng earthquake are discussed