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考虑到地壳的三维不均一性,将重力(包括引力和离心惯性力)和温度作用作为载荷,采用三维有限元法计算了地壳应力场。计算结果表明: (1)地壳水平应力以压应力占主导地位;(2)纬向水平应力与深度成正比,与纬度无关;(3)经向水平应力与深度成正比,与纬度成反比;(4)水平应力的各向异性程度随纬度的增大而减小;(5)地壳上部广泛存在着高水平应力。
Considering the three-dimensional inhomogeneity of the crust, the gravity (including gravitation and centrifugal inertial force) and the temperature action are taken as the loads, and the crustal stress field is calculated by the three-dimensional finite element method. The results show that: (1) the crustal horizontal stress is dominated by compressive stress; (2) the horizontal stress in the zonal direction is proportional to the depth and has nothing to do with the latitude; (3) the stress in the meridional direction is proportional to the depth and inversely proportional to latitude; (4) The degree of anisotropy of horizontal stress decreases with the increase of latitude; (5) There is widespread high level stress in the upper crust.