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本文系采用边界单元法对半无限地基进行三维动力分析.分析表明,在半无限体的三维动力分析中,该法远比有限单元法优越得多.文中有关基础与地基间相互作用的动力分析问题的讨论,仅限于三维刚性基础和均质线弹性(或粘弹性)土体.本文将动力问题用边界元法表示成时间域中的公式,并以逐步积分法求得相应的动力反应.最后,将圆形和矩形刚性基础的计算结果与理论值相比,两者十分吻合.
In this paper, the boundary element method is used to analyze the three-dimensional dynamics of semi-infinite ground. The analysis shows that in the three-dimensional dynamic analysis of semi-infinite body, the method is far superior to the finite element method. The dynamic analysis of the interaction between foundation and foundation in this paper. The discussion of the problem is limited to three-dimensional rigid foundations and homogenous linear elastic (or viscoelastic) soils. In this paper, the dynamical problem is represented by the boundary element method as a formula in the time domain, and a stepwise integral method is used to obtain the corresponding dynamic response. Finally, comparing the calculated results of the circular and rectangular rigid foundations with the theoretical values, the two are very consistent.