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饱和无限地基的动力分析是研究结构与饱和土共同作用的基础。当用有限区域模拟饱和无限地基时,将在人工截取的边界上发生波的反射,导致模拟失真。该文基于远置人工边界的原理,采用逐步扩大网格法的思想来解决这一问题。并通过算例验证了该方法的精度。该方法避免了饱和介质中其他人工边界实施上的繁琐,并且避开了其它人工边界存在的大角度入射情况以及稳定性问题等不确定因素,可以用于饱和介质中其他人工边界条件的检验工作。
Dynamic analysis of saturated infinite foundation is the basis for the study of the interaction between structure and saturated soil. When a finite area is used to simulate a saturated infinite foundation, the reflection of the wave will occur at the manually intercepted boundary, resulting in simulated distortions. Based on the principle of remote artificial boundary, this paper uses the idea of gradually expanding grid method to solve this problem. An example is given to verify the accuracy of the method. The method avoids the cumbersome implementation of other artificial boundaries in saturated media and avoids the uncertainties such as large-angle incidence and stability problems of other artificial boundaries and can be used for the inspection of other artificial boundary conditions in saturated media .