本文将结构周围的土体模拟为饱和多孔介质给出了饱和土体分析的广义Biot方程。采取多重子结构方法处理复杂结构与多孔介质土体的相互作用动力分析,扩大了问题的求解规模。对半无限域土体有限元动力分析应力波在人工边界上的反射,本文采取最新提出的一种改进的广义Smith非反射边界方法,节省了对计算机的存储要求,并使求解效率提高。文末附有算例。 In this paper, the generalized Biot equation for saturated soil analysis is given by simulating the soil around the structure as a saturated porous medium. The multiple substructure method was adopted to deal with the dynamic analysis of the interaction between the complex structure and porous media, and the scale of the problem was enlarged. In this paper, the finite element method of semi-infinite soil is used to analyze the reflection of stress waves on the artificial boundary. In this paper, an improved generalized Smith non-reflective boundary method is proposed, which saves the storage requirements of the computer and improves the solution efficiency. There are examples at the end of the text.