首页> 外文会议>Computational Science - ICCS 2007 pt.3; Lecture Notes in Computer Science; 4489 >Stabilized Procedures for Finite Element Analysis in Saturated Soils Under Cyclic Loading
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Stabilized Procedures for Finite Element Analysis in Saturated Soils Under Cyclic Loading

机译:循环荷载下饱和土中有限元分析的稳定程序

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Conventional finite element procedures with equal order interpolations for saturated soil dynamic u - p formulation have been experiencing numerical difficulties for the problems concerning with small permeability and neglectable compressibility of pore-fluid. Such difficulties can be avoided by the staggered implicit-implicit algorithm and the direct α -method which were introduced by Huang et al. (2004). Several numerical examples for surface step loadings were given to demonstrate the performance of the proposed methods. Since the numerical examples for the step loadings are not typical for dynamic problems, which usually show the relatively strong oscillation nature of dynamic behaviors. Due to the necessity to show the effectiveness of the proposed stabilization techniques for cyclic loading problems, two numerical examples regarding saturated soils subject to a surface cyclic loading are presented in this paper. Discussion on uniform and non-uniform mesh configuration is also given.
机译:对于饱和土动力u-p公式,采用等阶插值的常规有限元程序在数值模拟方面遇到了难题,这些问题涉及孔隙流体的渗透率小和可压缩性可忽略不计的问题。 Huang等人提出的交错隐式-隐式算法和直接α方法可以避免这些困难。 (2004)。给出了一些表面阶梯载荷的数值例子,以证明所提出方法的性能。由于阶跃载荷的数值示例对于动力学问题并不典型,因此通常显示出动力学行为的相对较强的振荡性质。由于有必要证明所提出的稳定技术对循环荷载问题的有效性,因此本文针对饱和土在表面循环荷载作用下的两个数值实例进行了介绍。还讨论了均匀和非均匀网格配置。

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