摘要
结合航空发动机转子叶片,讨论了复杂形体自动生成合理的有限元网格所遇到的困难和常用方法的优缺点及其改进途径.针对问题的几何特点,提出子块串联2D编号、广义四边形、复杂曲面节点坐标插值等实用方法.对于实际叶片的准静态有限元分析表明,上述方法弥补了通用网格自动生成方法的某些不足,比较简单、有效,可以在复杂形体有限元剖分时保持良好的单元形状,在自行研发的专用有限元程序设计中有普遍应用价值.
With rotor blade taken as an example, the difficulties of auto-generating shape-rational EF meshes and limitation of conventional methods were discussed when the discrete objects are geometrically complex and only one kind of elements is used, such as hexahedron element. Based on the geometrical characteristics of blades, some practical techniques were proposed, including 2D-series-connection numbering of sub-block nodes, application of generalized quadrilaterals and interpolation method of node coordinates on complex surfaces. They have been applied to the meshes of an actual blade , which is automatically generated by means of a 20-node iso-parametrical hexahedron element. The finite element discretion of the blade shows that the proposed techniques can provide better meshes than that generated by some common analysis softwares and make up for the defects of conventional ones. They are simple and effective and may be widely used in some EF programs for special purpose.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期446-449,共4页
Journal of Northeastern University(Natural Science)
基金
国防科工委预研基金资助项目(APTD-0201-006)
关键词
有限元网格
网格自动生成
复杂形体
转子叶片
准静态分析
finite element mesh
mesh auto-generation
geometrically complex body： rotor blade
quasi-static analysis
