铸造CAE系统的网格剖分技术

Study on Technique of Mesh Generation in Foundry CAE System

基于有限差分法和标准模板库(STL),研究铸造计算机辅助工程(CAE)系统中的网格剖分关键技术,具体包括STL实体截面轮廓快速生成、容错处理,以及截面网格信息的快速提取等技术.由于实现了容错处理技术,对于既定的铸件/铸型系统,其对应的STL数据文件即使存在一定的错误也可以顺利实施网格剖分,这就充分保证网格剖分的安全性和稳定性.特别地,由于采用了较为简单的数据结构及简洁的算法,所以确保网格剖分程序的高效率运行.最后,利用上述网格剖分技术成功实现三维铸件/铸型系统的网格剖分.

Based on finite difference method （FDM） and stereolithography （STL） file schema,the key techniques of mesh generation in foundry computer aided engineering （CAE） system have been studied,including the technique for fast generating outlines of cross-section, the technique for handling error tolerance and the technique for rapidly generating mesh from cross-section Because of the realization of the technique of error tolerance handling, mesh generating from the system of casting/mold may be smoothly carried out, even if some errors （not too serious） exist in its STL data file, making the process of mesh generation more secure and steady. Particularly, with simple data structure and simple algorithm, the program of mesh generation has been efficiently running. Finally, based on the key techniques mentioned above, mesh generating from the three dimensional casting/mold system has been successfully inplemented.