摘要
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 infinite saturated foundation is required to study the saturated soil-structure interaction. If infinite saturated foundation is simulated by a finite region, wave reflection will take place on the artificial intercepted boundary. Adopting remote artificial boundaries, this problem is solved by gradual enlargement mesh. The method is verified through an example. With gradual enlargement mesh method, not only the difficulty of implementation on other artificial boundary can be avoided, but also some uncertain factors in other artificial boundary such as boundary stability and large angle incidence and so on can be avoided, so it can be used to check other artificial boundary.
出处
《工程力学》
EI
CSCD
北大核心
2010年第4期149-152,184,共5页
Engineering Mechanics
基金
中国农业大学科研启动基金项目(2007016)
国家科技支撑项目(2006BAJ04B03-002)
关键词
饱和无限地基
逐步扩大网格法
动力分析
人工边界
波动
infinite saturated soil foundation
gradual enlargement mesh method
dynamic analysis
artificial boundary
wave motion
