对整体平衡方程关于空间坐标积分，根据边界条件可确定总应力，并进而求得孔隙压力。
By integrating the dynamic equilibrium equation of porous media and using the boundary condition, total stress and fluid pressure are determined in turn.
为此，推导了不连续面对整体平衡方程组的贡献方程，研究了模拟不连续面实际接触状态的非线性迭代算法。
The contributive equation of discontinuous interface to the system of equations is derived and nonlinear iterative algorithms for simulating the contact state of a discontinuous interface are studied.
然后引入作用较大的高阶广义节点形函数，扩充广义刚度矩阵，并求解新的整体平衡方程，得到更高精度的数值解。
Then, those useful generalized nodes are selected, and the generalized stiffness matrix is enlarged. A more accurate numerical solution can be obtained after the new equilibrium equations are solved.
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