ABAQUS6.12 orphan to geometry_upload
- 格式：doc
- 大小：155.50 KB
- 文档页数：11
1 Creating geometry from orphan elements (从孤立网格创建几何体)
方法如下：
1. 创建几何面。Abaqus/CAE Usage: Part module: ToolsGeometry Edit: Face: From element faces 2. 你每增加一个面，Abaqus/CAE在存在的几何体上缝上新面，最终产生孤立单元体表面生成一个壳体。 3. 当创建新面结束后，如果需要可使用Geometry Edit toolset中其它工具对几何体进行修整。每个面都具有独立特性，你不能对由单元面创建的面进行编辑。然后，你可增加新的几何特征、由壳体创建实体、抑制或删除孤立网格、对所创建的part划分新网格。 4. 在Abaqus6.12中新增功能，允许你把孤立单元面当作sketch plane（草图平面）
下面的步骤将帮助你从孤立网格创建几何体： 1.创建新几何面
使用由单元面生成面工具（Face from element faces tool ）创建模型的表面几何形状。每使用一次该工具，所选择的孤立单元外表面就创建一个壳面。该工具包含几个独特的方法用于选择包含多个孤立单元的边界面，以及自动将新创建的面缝合到对应的几何体上。更多信息见 ―Create face from element faces,‖ Section 69.7.10。当你完成创建面后，所有的孤立单元外表面将被几何体面覆盖。
2.移除多余的边及面 使用Geometry Edit toolset中其它工具移除多余的边，小面，及对其它对生成好网格有影响的特征。如必须，将该零件转化为精确的几何体。更多信息见 ―A strategy for repairing geometry,‖ Section 69.4
3.生成实体 如果需要一个实体part，在Create solid工具中，使用 Create solid from shell tool 可生成实体零件。
4.分割及对part进行网格划分 抑制或删除孤立网格，对part划分新网格。
5.在对几何体修复完成后再分割part 如果part中包含分割，Geometry Edit toolset将删除分割。为了避免这种问题，你应该在对part编辑完成后才能分割part。
3.8 Creating geometry from orphan elements 2
(从孤立网格创建几何体) Product: Abaqus/CAE Benefits: You can now use orphan element faces to create geometric faces and, in turn, entire parts. 好处：现在可以用孤立网格面创建几何面，然后建立整个实体。 Description: You can create geometric faces that follow the contour of orphan element faces. In addition to selecting orphan element faces individually and by angle, you can use the following new selection methods to choose orphan element faces from which to create new geometry: 描述：可由孤立网格面创建几何面。除了用一个一个的分别选择及角度方法外，可用下面新的选择方法选择孤立网格面，并创建新几何面：
Limiting angle: Enter a maximum angle, and pick a starting element face; Abaqus/CAE measures the angle from the selected face to each adjacent face. Selection continues outward from the picked face until the measured angle with the original face is exceeded. 方法1。Limiting angle（极限角）：输入一个最大角度，然后选择开始的单元面；Abaqus/CAE以选择的单元面为基准，测量与相邻面的夹角。Abaqus从选择的面继续向外选择面直到所寻找到的面的与原始面的夹角超过所给定的极限角。
Layer: Specify a number of layers, and pick a starting element face; Abaqus/CAE selects element faces radiating out from one that you selected up to the number of layers. Selection continues until the number of layers is reached or there are no more orphan element faces in a particular direction. 方法2。Layer（层）：定义一些层，然后选择一个开始的单元面；Abaqus/CAE从你选择的单元面开始，直到所定义的层数。继续选择直到所定义的层数，或在指定的方向上没有孤立单元面。
Analytic: Pick a starting element face, and Abaqus/CAE adds all faces that it determines to be part of the same analytic shape. Analytic shapes include planes, cylinders, cones, spheres, and tori. 方法3。Analytic（解析体方法）：选择开始的单元面，Abaqus/CAE增加认为是相同解析体上所有面。解析体包括平面，圆柱，圆锥，球，圆环。
As you add faces, Abaqus/CAE stitches new faces to any existing geometry to produce a shell part. Figure 3–6 shows an orphan mesh part and the same part with most faces converted into geometry. 你每增加一个面，Abaqus/CAE在存在的几何体上缝上新面，最终产生一个壳体，Figure 3–6 给出了一个孤立单元体及由面所形成的体。 Figure 3–6 Converting orphan element faces to geometric faces. 3
When you are finished creating new faces, you can use the other tools in the Geometry Edit toolset to repair the geometry if needed. Each face is created as a separate feature, and you cannot edit the faces that you create from element faces. However, you can add new geometry features, create a solid from the shell part, suppress or delete the orphan mesh, and create a new mesh for the part. 当创建新面结束后，如果需要可使用Geometry Edit toolset中其它工具对几何体进行修整。每个面都具有独立特性，你不能对由单元面创建的面进行编辑。然后，你可增加新的几何特征，由壳体创建实体，抑制或删除孤立网格，对所创建的part划分新网格。 A related enhancement in this release allows you to use orphan mesh faces as a sketch plane (for more information, see ―Combining orphan and native mesh features in a model,‖ Section 12.2). 在Abaqus6.12中新增功能，允许你把孤立单元面当作sketch plane（草图平面）（更多信息见―Combining orphan and native mesh features in a model,‖ Section 12.2).在模型中混合孤立网格及本地网格特性） Abaqus/CAE Usage: Part module: ToolsGeometry Edit: Face: From element faces References:
Abaqus/CAE User's Manual ―Using the limiting angle, layer, and analytic methods to select multiple element faces,‖ Section 6.2.6 ―Creating a part from orphan elements,‖ Section 69.5 ―Create face from element faces,‖ Section 69.7.10
6.2.6 Using the limiting angle, layer, and analytic methods to select multiple element faces 使用极限角、层、分析方法选择多个单元面
When you are selecting orphan element faces to create geometry (for more information, see ―Create face from element faces,‖ Section 69.7.10), Abaqus/CAE displays a field in the
