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首页> 外文期刊>Advances in Engineering Software >Automatic coupling of a boundary element code with a commercial finite element system
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Automatic coupling of a boundary element code with a commercial finite element system

机译：边界元素代码与商业有限元系统的自动耦合

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摘要

An automatic procedure for the coupling of a linear elastic three dimensional boundary element code with a commercial finite element system is presented. Each closed BE domain in the mixed FEM/BEM model is defined as a finite macro element for which a stiffness formulation is generated by the 3D Symmetric Galerkin Boundary Element Method (SGBEM) and hence can be assembled to the global finite element formulation. For the case of combining finite shell elements with 3D boundary elements coupling equations in an integral sense are implemented as user defined multi point constraints. No user interaction is required during the analysis since detection of the coupling configurations, setting up and applying the MPCs is realized in an automatic manner. An in-house SGBEM code is used in combination with the commercial finite element package ABAQUS for automatically coupled FEM/BEM-analyses. Basic steps of the automatic coupling procedure are explained and necessary background information is provided. Some examples and illustrations display the capabilities of the developed software and a comparison of the combined FEM/BEM technique with pure SGBEM and FEM simulations underlines its benefits.
机译：提出了一种线性弹性三维边界元代码与商业有限元系统耦合的自动程序。混合FEM / BEM模型中的每个封闭BE域都定义为有限宏单元，其刚度公式是通过3D对称Galerkin边界元方法（SGBEM）生成的，因此可以组装为全局有限元公式。对于将有限壳单元与3D边界单元组合的情况，将积分方程式作为用户定义的多点约束来实现。在分析过程中不需要用户交互，因为可以自动实现对耦合配置的检测，设置和应用MPC。内部SGBEM代码与商业有限元软件包ABAQUS结合使用，可自动进行FEM / BEM分析。解释了自动耦合过程的基本步骤，并提供了必要的背景信息。一些示例和插图显示了所开发软件的功能，并且将FEM / BEM组合技术与纯SGBEM和FEM仿真进行了比较，突显了其优势。

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