hypermesh例题.docVIP

Importing and Repairing CAD - HM-2000 In this tutorial, you will: ? Delete untrimmed surfaces ? Close missing surfaces ? Set the cleanup tolerance ? Equivalence free edges ? Delete duplicate surfaces The benefits of importing and repairing CAD are: ? Correcting any errors in the geometry from import ? Creating the simplified part needed for the analysis ? Meshing a part all at once ? Ensuring proper connectivity of mesh ? Obtaining a desirable mesh pattern and quality Exercise: Importing and Repairing CAD Geometry Data This exercise uses the model file, clip_repair.hm. Step 1: Open and view the model file, clip_repair.hm. Step 2: View the model in topology display toolbar and shaded mode to evaluate its integrity. 1. Observe where the model has incorrect connectivity and missing or duplicate surfaces. 2. Go to the autocleanup panel. Note that the surface edges are now colored according to their topology status. This occurs because Geometry Color is set to auto (). 3. Click Wireframe Geometry () and Shaded Geometry and Surface Edges () to explore the different display modes. The toolbar contains icons that control the display of the surfaces and surface edges. Surfaces can be shaded with or without edges or wireframe. Right-click the icons to access the drop-down menu for additional options. Place your mouse over the cursor to view a description of the button’s functionality. 4. Click Visualization () and navigate to the Topology tab. Visualization controls the display of the surfaces and surface edges. Surfaces can be shaded or wireframe. The check boxes within this menu turn the display of the different edge types and fixed points (surface vertices) on or off. 5. Clear all the check boxes except the Free check box. Only the free edges should be displayed at this point. 6. Observe the free edges and make note of where they are. The free (red) edges show where there is incorrect connectivity or gaps. 7. Note the locations where there are closed l