Development of Extendable CAE Foundation Software by Free-Mesh Method

采用自由网格法开发可扩展的CAE基础软件

• 批准号: 13355005
• 负责人: KANTO Yasuhiro
• 金额: $ 18.39万
• 依托单位: Toyohashi University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13355005/
• 关键词: Free-Mesh Method; Finite-Element Method; Object-Oriented Approach; Three Dimentional Analysis; Structural Analysis; Computer-Aided Engineering; Crack Analysis; Parallel Computing; フリーソフト; 流体解析; 並列計算; 機能拡張; デザインパターン; 弾塑性解析; 破壊解析; デザイン・パターン

In this research, we developed a CAE foundation software which can generate domain decomposition parallel analysis programs based on the free-mesh method. This software was opened to public as a flee software. The functions of the software are three dimensional structural analysis, and pre-and post processor, including plug-ins to connect with GiD developed at the International Center for Numerical Methods in Engineering, Barcelona, Spain. The research results can be summarized as follows :-The software was designed by using the Design Patterns to attain easy extendability of functions.-High precision 4-node tetrahedral element was developed and applied to 3-dimensional flow analysis of fresh concrete. A3-dimensional crack propagation program was also developed and applied to 2 phase material with bone material and mortar.-A CAE system which can analyze 3-dimensional complicated shaped body seamlessly from CAD models to calculated results was developed and applied to crack propagation problem with mixed mode loading.-A fast parallelized local mesh generation algorithm was developed by using Quasi-constrained Delaunay triangulation method based on the Gift Wrapping Method. This algorithm enabled to generate numerical models of structures having internal cracks.-A-3-dimensional free-mesh analysis program of transient heat-transfer problems was developed, as an application to a dynamic problem.-A 2-dimensional free-mesh analysis program of crack propagation problem was developed and the results were compared and verified with those of finite element analyses.

在本研究中，我们开发了一个CAE基础软件，可以生成基于自由网格法的区域分解并行分析程序。该软件作为一个远程软件向公众开放。该软件的功能是三维结构分析，前处理器和后处理器，包括插件连接GiD开发的国际中心数值方法在工程，西班牙巴塞罗那。研究结果可归纳如下：-本软件采用设计模式进行设计，使功能易于扩充。提出了一种高精度四面体单元，并将其应用于新拌混凝土的三维流动分析。本文还编制了一个三维裂纹扩展程序，并应用于含骨材料和砂浆的两相材料。开发了一个能够对三维复杂形体从CAD模型到计算结果进行无缝分析的CAE系统，并将其应用于复合型载荷下的裂纹扩展问题。提出了一种基于Gift Wrapping方法的准约束Delaunay三角剖分方法的局部网格快速并行生成算法。该算法能够生成具有内部裂纹的结构的数值模型。本文编制了一个三维自由网格瞬态传热分析程序，并将其应用于一个动态问题。编制了裂纹扩展问题的二维自由网格分析程序，并与有限元分析结果进行了比较和验证。

项目成果

T.Fujisawa, G.Yagawa: "Node-based finite element method for large-scale adaptive fluid analysis in parallel environments"Int.Conf.Supercomputing in Nuclear Applications. 96 (2003)

T.Fujisawa、G.Yakawa：“并行环境中大规模自适应流体分析的基于节点的有限元方法”Int.Conf.核应用中的超级计算。

Fujisawa, Inaba, Yagawa: "Parallel computing of high-speed compressible flows using a node-based finite-element method"Int.J. for Numerical Methods in Engineering. 58. 481-511 (2003)

Fujisawa、Inaba、Yakawa：“使用基于节点的有限元方法并行计算高速可压缩流”Int.J.

今里, 酒井: "CADデータを用いたフリーメッシュ法の3次元問題への適用"日本計算工学会論文集2002年号. 4. 113-122 (2002)

Imazato, Sakai：“使用 CAD 数据的自由网格方法在三维问题中的应用”，日本计算工程学会会议记录，2002 年第 4 期。113-122（2002 年）。

松原, 伊良波, 富山, 矢川: "回転自由度を有する3次元要素を用いたフリーメッシュ法"コンクリート工学年次論文集. 25-2. 67-72 (2003)

Matsubara、Iranami、Toyama、Yakawa：“使用具有旋转自由度的三维单元的自由网格方法”混凝土工程年度论文集 25-2（2003）。

Matsubara, Iraha, Tomiyama, Yagawa: "Three-Dimensional Element with Rotational Degree of Freedom for Free-Mesh Method"Trans.Japan Concrete Institute. 25-2. 67-72 (2003)

Matsubara、Iraha、Tomiyama、Yakawa：“自由网格法的具有旋转自由度的三维单元”Trans.Japan Concrete Institute。