Hexahedral mesh generation method for geometric features
-
摘要: 为了保证自适应性以及生成网格与总体网格之间的协调性,针对结构规则的复杂局部特征的网格剖分过程,提出了几何特征的六面体网格剖分方法.首先,分析了几何特征的类型以及网格剖分流程,并以此为基础将与几何特征网格剖分相关的参数进行分类.然后,通过将参数化的设计思想分别引入实体分离、特征体分解、网格生成等几何特征网格剖分环节,建立从几何特征信息到网格剖分细节(如边网格数、网格剖分策略等)的参数驱动机制,并构建几何特征网格剖分数据库,使得与几何特征对应的参数驱动机制固化在网格剖分程序中.最后,分别在不同单元尺寸情况下,对涡轮叶片上的气膜孔和扰流柱特征进行六面体网格剖分.实验结果表明了所述方法的可行性和稳定性.Abstract: In order to guarantee self-adaptability of geometric features and coordination between meshes of geometric features and overall structure, a hexahedral mesh generation method for geometric features was proposed which focuses on generating high-quality hexahedral meshes for local complex features having regular structures. Firstly, types of geometric features and meshing processes of geometric features were analyzed, based on which parameters relevant to meshing processes of geometric features were separated into two categories, real and virtual parameters. Subsequently, through integrating the design thought of parameterization into geometric features' three typical meshing processes including entity separation, feature decomposition and mesh generation, a parameter-driven mechanism transferring information from geometric features into meshing details (such as numbers of elements of edges, specific meshing strategies, etc) was built. Also, meshing database for geometric features was established so as to solidify the parameter-driven mechanism corresponding to geometric features into meshing programs. Finally, film-cooling holes and spoiling posts of turbine blades were meshed under different designated element sizes. Meshing results reveal the applicability and stability of the method proposed.
-
Key words:
- geometric feature /
- hex-mesh /
- meshing parametric design /
- meshing database /
- adaptive meshes
-
[1] Lai Y K, Kobbelt L, Hu S M.Feature aligned quad dominant remeshing using iterative local updates[J].Computer Aided Design, 2010, 42(2):109-117 [2] Frey P, George P L.Mesh generation[M].New Jersey:John Wiley & Sons, 2010 [3] Bommes D, Lévy B, Pietroni N, et al.Quad-mesh generation and processing:a survey[J].Computer Graphics Forum, 2013, 32(6):51-76 [4] Zhang Y J, Hughes T J R, Bajaj C L.An automatic 3d mesh generation method for domains with multiple materials[J].Computer Methods in Applied Mechanics and Engineering, 2010, 199( 5-8):405-415 [5] Lo S H.Dynamic grid for mesh generation by the advancing front method[J].Computers and Structures, 2013, 123:15-27 [6] 王东风, 翟建军, 陈文亮.基于映射法的六面体网格生成算法[J].现代设计与先进制造技术, 2009, 38(5):25-27 Wang Dongfeng, Zhai Jianjun, Chen Wenliang.A hex-mesh generation algorithm based on mapping method[J].Modern Design and Advanced Manufacturing Technology, 2009, 38(5):25-27(in Chinese) [7] 邵辉, 陈文亮, 彭威.基于多轴扫掠的六面体网格划分算法[J].现代设计与先进制造技术, 2011, 40(13):25-27 Shao Hui, Chen Wenliang, Peng Wei.A hexahedral meshing algorithm based on multi-axis sweeping[J].Modern Design and Advanced Manufacturing Technology, 2011, 40(13):25-27(in Chinese) [8] Ruiz-Girons E, Sarrate J.Generation of structured hexahedral meshes in volumes with holes[J].Finite Elements in Analysis and Design, 2010, 46(10):792-804 [9] Tautges T J, Liu S S, Lu Y.Feature recognition applications in mesh generation[R].SAND-97-2126C, 1997 [10] 王东风.基于几何分解的六面体网格生成算法的研究[D].南京:南京航空航天大学, 2009 Wang Dongfeng.The generation of hexahedral meshes based on geometry decomposition[D].Nanjing:Nanjing University of Aeronautics and Astronautics, 2009(in Chinese) [11] Liu S S, Gadh R.Basic logical bulk shapes(BLOBs) for finite element hexahedral mesh generation[C]//Proc 5th International Meshing Roundtable.Berlin:Springer Press, 1996:291-306 [12] 叶修梓, 彭维, 唐荣锡.国际CAD产业的发展历史回顾与几点经验教训[J].计算机辅助设计与图形学学报, 2003, 15(10):1185-1193 Ye Xiuzi, Peng Wei, Tang Rongxi.The history of international CAD industry:a review with analysis[J].Journal of Computer Aided Design and Computer Graphics, 2003, 15(10):1185-1193(in Chinese) [13] 金建国, 周明华, 坞学军.参数化设计综述[J].计算机工程与应用, 2003, 39(7):16-18 Jin Jianguo, Zhou Minghua, Wu Xuejun.Review of parametric design method[J].Computer Engineering and Applications, 2003, 39(7):16-18(in Chinese) [14] 邵晨曦, 欧阳扬, 杨明, 等.参数化设计的定性建模与仿真[J].系统仿真学报, 2007, 19(33):5361-5365 Shao Chenxi, Ouyang Yang, Yang Ming, et al.Qualitative modeling and simulation to parametric design[J].Journal of System Simulation, 2007, 19(33):5361-5365(in Chinese) [15] 宋玉旺, 席平.基于特征造型技术的涡轮叶片参数化设计[J].北京航空航天大学学报, 2004, 30(4):321-324 Song Yuwang, Xi Ping.Parametric design of turbine blades based on feature modeling[J].Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(4):321-324(in Chinese)
点击查看大图
计量
- 文章访问数: 1361
- HTML全文浏览量: 114
- PDF下载量: 661
- 被引次数: 0