摘要
提出一种四边形网格自动剖分的改进行波算法。无需设置背景网格,将多介质复杂区域分成多个封闭子域,由AutoCAD模型自动提取各封闭子域边界的点线信息,利用网格密度参数和封闭域点线的拓扑关系控制内部节点的生成,采用总体密度和临近子域的相对大小控制网格疏密,通过网格质量评价体系和多重优化措施保证网格质量。先将计算域剖分为三角形网格,优化后通过合并、分解生成四边形单元,再次对四边形单元进行优化处理即可获得优良的四边形网格。某铁路路堤工程断面和瀑布沟电站厂房2#机组断面计算域的网格剖分实例验证了该方法的可行性和可靠性。
An improved advancing front method is proposed for the automatic generation of quadrilateral grid.Background grid does not need to be configured first,and the multimedia complex domain is divided into several closed sub-domains.Information of points and lines from these closed sub-domain boundaries are automatically extracted from the AutoCAD model.The generation of internal nodes is controlled with grid density parameters and topology of points and lines from the closed domain.Grid density is controlled by the global density parameter and the relative size of adjacent sub-domains.Grid quality evaluation system and multiple refinement measures are used to improve the grid quality.The whole domain is divided into triangle grids,which are optimized and subsequently combined or divided to generate quadrilateral elements.Good quadrilateral grids are obtained by optimization measures once again.Examples of the grid generation for computational domain of a railway embankment section and the No.2 unit section of Pubugou power station underground plant demonstrate the feasibility and reliability of this method.
出处
《长江科学院院报》
CSCD
北大核心
2012年第7期82-85,共4页
Journal of Changjiang River Scientific Research Institute
基金
武汉大学水资源与水电工程科学国家重点实验室开放基金(2011B087)
流体及动力机械省部共建教育部重点实验室学术成果培育项目(SBZDPY-11-9)
关键词
改进行波法
多介质复杂区域
四边形网格
自动剖分
improved advancing front method； multimedia and complex domain； quadrilateral grid； automatic generation
