地震应力触发数值模拟的初步研究

PRELIMINARY STUDY ON THE TRIGGER DIGITAL SIMULATION OF THE EARTHQUAKE STRESS

本文基于有限元方法,初步建立了西南地区二维和三维数值模拟有限元模型,并针对川滇地区,重点建立了包括上地壳、下地壳、上地幔等的三维有限元模型。最后,讨论了地震产生的应力变化对整个西南地区的应力调整情况。结果表明:前一地震对后续地震有一定的触发作用。因此,强震活动有限元模型的建立对判定未来强震危险区有一定的作用。

On the basis of the finite element method,two-dimensional and three-dimensional simulat finite element models in Southwest area were set up,the three-dimensional finite element models of upper crust,under srust and upper mantle were set up emphatically in Chuandian area.Fanally,the stress adjust situation by the stress change due to the earthquake in the whole Southwest was discussed.It shows that the front earthquake has a trigger action to the next earthquake.So it is usefull that the strong earthquake activity finite element model was used for judging strong earthquake dangerous area in the future.