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发表于 2009-2-20 15:51
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来自: 中国上海
关于网格划分:
1、对于3D网格剖分,请一定要控制好参数CurvatureRefinementMinimumElementSize,它的意思是曲面网格的最小网格尺寸,控制好该参数,你的3D模型的曲面网格就能很好的控制,加快网格剖分速度。
2、对于2D的区域网格加密,请参考以下:
Control regionsIt may be advantageous to define control regions instead of constructing control components. Since no materials are associated with control regions, nothing prevents one such region from being occupied by multiple materials (whereas in this case multiple control components would be required). For example, five control regions (four circular and one rectangular) are sufficient to produce the C-core mesh shown below. In 3D, another advantage of control regions is that they can be surfaces (this would not be possible with control components since zero-volume components are not allowed in 3D solving).
DefinitionThe top-level parameter MeshRefinementControlRegions allows one to specify Maximum Element Sizes on eight types of control regions. In the figure below, left, the parameter is set to the value corresponding to the previous figure. Setting this parameter is best done via the SetMeshRefinementControlRegions script form shown below, right.
The MeshRefinementControlRegions parameter specifies control regions as a list of variant arrays contained in a larger variant array. Its format is therefore
{{Control region}} or {{Control region 1},{Control region 2}, ...}.
Notice that there are at least two sets of braces. The format of Control region is one of the following:
- Circle-based regions
Circle for 2D | 'Circle', MES, [cx,cy], radius
| Annulus for 2D | 'Annulus', MES, [cx,cy], radius, outer radius
| Sphere | 'Sphere', MES, [cx,cy,cz], radius
| Circle | 'Circle', MES, [cx,cy,cz], [axis_x,axis_y,axis_z], radius
| Cylinder | 'Cylinder', MES, [cx,cy,cz], [axis_x,axis_y,axis_z], radius, length
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- Parallelogram-based regions
Parallelogram for 2D | 'Plane', MES, [cx,cy], [wvec_x,wvec_y], [hvec_x,hvec_y]
| Parallelogram | 'Plane', MES, [cx,cy,cz], [wvec_x,wvec_y,wvec_z], [hvec_x,hvec_y,hvec_z]
| Parallelepiped | 'Cube', MES, [cx,cy,cz], [wvec_x,wvec_y,wvec_z], [hvec_x,hvec_y,hvec_z], [dvec_x,dvec_y,dvec_z]
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Units are in meters. The various terms have the following English meanings
MES | Maximum Element Size
| c | center
| axis | axis vector
| wvec | width vector
| hvec | height vector
| dvec | depth vector
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and the following geometric meanings:
The eight types of control regions and their defining terms. ----------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------
具体做法:
选中项目名称,右键属性,打开参数,设置MeshRefinementControlRegions 选项,例如{{'Annulus',0.05%mm,[0,0],3%mm,3.5%mm}} 则表示设置圆心0,0,内半径3mm,外半径3.5mm的圆环区域的网格最大值为0.05mm。 ,结果如下图:
file:///C:/Documents%20and%20Settings/u/My%20Documents/My%20Pictures/Catch0.jpg
3、对于网格剖分,只要掌握软件的基本剖分参数,基本上不会出现楼上各位的烦扰的。 |
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