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为考虑坝体-地基共同作用,建立了有限元-无限元耦合分析模型.首先介绍了二维问题中常用的单向无限单元的坐标变换式和位移函数,然后运用ABAQUS程序对一具有精确解的平面问题分别进行了有限元、有限元-无限元耦合分析,验证了引入无限元模拟无限域或半无限域问题的正确性和精确性.然后对KOYNA重力坝进行了静力计算分析,对有限元、有限元-无限元计算结果进行了比较.结果表明,基于ABAQUS的有限元-无限元法计算量小、精度高,为求解类似的无限域或半无限域问题提供了简洁、合理、精确的计算方法.
In order to consider the dam-foundation interaction, a finite element-finite element coupled analysis model is established.Firstly, the coordinate transformation formulas and displacement functions of the one-way infinite element commonly used in two-dimensional problems are introduced, and then an ABAQUS- The finite element method and finite element method coupled with finite element method are used respectively to verify the accuracy and accuracy of the finite element method and infinite element method.After that the static analysis of KOYNA gravity dam is carried out, Finite element method and finite element method.Results show that the finite element method and finite element method based on ABAQUS have the advantages of low computational complexity and high precision and provide a simple and reasonable method for solving similar infinite or semi- Accurate calculation method.