ansys workbench总结.docx

Workbench 总结1.CAD建模几个重要的概念与功能PART 多体部件体from new part和布尔操纵体的区别，Part内部无接触，可定义不同材料Active和Freeze冻结体Slice功能与Freeze的配合使用抑制体的使用suppress面印记Imprint Face的功能概念建模：产生面体要在 CAD or DM中使用Use CAD or DM to:Simplify the geometryMerge small edgesMerge the faces in order to reduce the number of facesAvoid narrow facesKeep volume gaps only where importantDecompose the geometryRemove unnecessary geometriesAdd geometriesRepair the geometry2.网格划分技巧：Strategies to Improve Mesh Quality策略CAD Cleanup清理Virtual Topology拓扑Pinch Controls微量控制Sensible Mesh Sizing and Inflation Settings网格大小控制和膨胀设置General Recommendations 一般建议Mesh Quality Metrics in ANSYS Meshing网格质量检查Skewness 偏斜Aspect Ratio纵横比Worst Element最差单元Mesh metrics available in ANSYS Meshing include:Element QualityAspect RatioJacob RationWarping FactorParallel DeviationMaximum Corner AngleSkewness 1网格质量检查Two methods for determining skewness:Based on the Equilateral Volume deviation: Skewness =Applies only to triangles and tetrahedronDefault method for tris and tets 偏斜=（正四面体 -- 实际四面体）/ 正四面体Based on the deviation from a Normalized Angle deviation:Skewness = Where is the equiangular face/cell (60 for tets and tris, and 90 for quads and hexas)Applies to all cell and face shapes 单元和面Used for prisms and pyramids 棱柱和棱锥skewness For Hexa, Tri and Quad: it should be less than 0.8For tetrahedra: it should be less than 0.9Aspect Ratio纵横比Aspect for generic triangles and quads is a function of the ratio of longest side to the shortest side of the reconstructed quadrangles (see User Guide for details)Equal to 1 (ideal) for an equilateral triangle or a square For Aspect Ratio:It should be less than 40, but this depends onthe flow characteristicsMore than 50 may be tolerated at the inflation layersWorst Element最差单元 For Aspect Ratio:It should be less than 40, but this depends onthe flow characteristicsMore than 50 may be tolerated at the inflation layersFor Cell Size Change:It should be between 1 and 2. 2策略Model中的Virtual Topology 的功能：合并。How to use ??删去不必要的合并。Me