CAE/CAD integration has always been the focus of competition among CAE software vendors. For decades, however, despite the large human resource and financial investment from some super international companies, CAE/CAD integration has not yet been fully realized. As we know, the boundary integral equation method has advantages of naturally seamless connection with CAD packages. Unfortunately, the conventional implementation of the boundary element method is unsuccessful in engineering application. In this paper, a new method to seamlessly integrate CAE/CAD based on boundary integral equations and nonconforming meshes is introduced. The nonconform mesh can effectively promote automatic CAE analysis development, while the dual interpolation boundary face method provides theoretical support for the above technologies. In addition, a spherical subdivision method is proposed to improve the accuracy and stability of singular and near-singular integrals in BIE. Adaptive cross approximation algorithm can reduce the storage of the dense coefficient matrix effectively and approximate the far-field matrix for large-scale computation. Based on the above theories, the "5aCAE simulation software" is developed. In this software, CAE analysis is performed directly on the CAD model using discontinuous mesh without geometric simplifying and repairing, which is impossible for existing commercial software. There is no need to select element types such as beams, shells elements, because any structure is treated as a complete entity. Automation is another feature of this software, which lowers the threshold for users. This paper presents a comprehensive overview of the dual interpolation boundary surface method and introduces the highlights of "5aCAE simulation software", which can provide technical support for boundary element CAE software development.

中文翻译：

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基于DiBFM的5aCAE软件简介：CAD/CAE集成、双插值、精确几何和非一致性网格


CAE/CAD集成一直是CAE软件厂商竞争的焦点。然而几十年来，尽管一些超级国际公司投入了大量的人力资源和财力，CAE/CAD集成尚未完全实现。众所周知，边界积分方程法具有与CAD软件包天然无缝衔接的优点。不幸的是，边界元法的常规实现在工程应用中并不成功。本文介绍了一种基于边界积分方程和非相容网格无缝集成CAE/CAD的新方法。非均匀网格可以有效促进自动CAE分析的发展，而对偶插值边界面方法则为上述技术提供了理论支持。此外，提出了一种球面细分方法来提高BIE中奇异和近奇异积分的精度和稳定性。自适应交叉逼近算法可以有效减少稠密系数矩阵的存储量，并逼近远场矩阵以进行大规模计算。基于上述理论，开发了“5aCAE仿真软件”。在该软件中，直接使用不连续网格对CAD模型进行CAE分析，无需进行几何简化和修复，这是现有商业软件不可能实现的。无需选择梁、壳等单元类型，因为任何结构都被视为一个完整的实体。自动化是该软件的另一个特点，降低了用户的使用门槛。 本文对对偶插值边界面法进行了全面的概述，并介绍了“5aCAE仿真软件”的亮点，可以为边界元CAE软件开发提供技术支持。