基于独立覆盖流形法的CAD与CAE融合研究

发布时间：2018-07-03 10:03

本文选题：CAD和CAE融合 + 数值流形方法　；参考：《长江科学院院报》2017年12期

【摘要】：采用前期笔者提出的独立覆盖流形法,尝试CAD和CAE融合的新途径。以二维结构的线弹性静力分析为例,实现从CAD到CAE的无缝连接,以及CAE的完全自动化分析。在基于前期CAD几何的流形法研究基础上,给出NURBS曲线(CAD中的通用图形标准)与直线的切割算法,实现CAD几何模型在CAE建模和网格细化中的保形性;通过Auto CAD的DXF图形格式,将CAD中的结构形状、荷载及约束信息直接输出到CAE;基于矩形独立覆盖的自适应分析技术,实现结构静力分析的自动化计算;自动生成有限元网格用于计算结果后处理的图形输出。综合以上研究,用一个二维结构静力分析算例演示了从CAD几何建模和输出,到CAE的自动前处理、自动分析、自动后处理的完整过程,所有的人工操作仅限于CAD中,而CAE分析过程无需人工参与,就可以获得满足设定精度的计算结果。
[Abstract]:In this paper, a new approach of CAD and CAE fusion is proposed by using the independent covering manifold method proposed by the author. Taking the linear elastic static analysis of two-dimensional structure as an example, the seamless connection from CAD to CAE and the complete automatic analysis of CAE are realized. On the basis of the study of manifold method based on previous CAD geometry, this paper presents the Nurbs curve (the general graphics standard in CAD) and the cutting algorithm of straight line, realizes the shape preservation of CAD geometric model in CAE modeling and mesh refinement, and through the DXF graphic format of Auto CAD, The structure shape, load and constraint information in CAD are directly outputted to CAE, and the automatic calculation of structure static analysis is realized based on the adaptive analysis technology of rectangular independent cover. Automatic generation of finite element meshes for post-processing graphics output. Based on the above research, the complete process from CAD geometric modeling and output to CAE automatic pre-processing, automatic analysis and automatic post-processing is demonstrated with a two-dimensional structural static analysis example. All manual operations are limited to CAD. However, the CAE analysis process can obtain the calculation results which satisfy the set precision without manual participation.
【作者单位】：长江科学院水利部水工程安全与病害防治工程技术研究中心;长江科学院材料与结构研究所;
【基金】：中央级公益性科研院所基本科研业务费项目(CKSF2015033/CL,CKSF2016022/CL)
【分类号】：TP391.7

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