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tutcompgeom [2012/02/29 12:37]
ramcdona
tutcompgeom [2018/04/01 14:41]
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-====== Intersected Component Wireframes ====== 
  
-This installment of the Cart3D tutorial will walk through the process of generating an intersected component wireframe in VSP.  If you haven'​t built the Onera M6 wing, or you don't have your own geometry to analyze, you should go back to the [[OneraM6|geometry generation]] phase of the tutorial or you can download a ready-to-go [[http://​www.openvsp.org/​files/​OneraM6.vsp|Onera M6 geometry]]. 
- 
-==== Generating an Intersected Component Wireframe ==== 
- 
-As you proceed through the tutorial to mesh the Onera M6, remember that images have been included as thumbnails, so any place you see a picture, click on it for a larger version. 
- 
-  - Onera M6 start 
-     * Start with the Onera M6 model from the end of the model building tutorial. \\ {{:​13_name.png?​direct&​200|}} 
-  - Refine airfoil points 
-     * The triangulated wireframe is created by connecting the diagonals of the quadrilateral wireframe shown on screen. ​ Consequently,​ the resolution of the triangulated wireframe is determined by the resolution of the quadrilateral wireframe shown on screen. 
-     * As discussed in the [[MeshOverview|Mesh Generation]] discussion of the tutorial, Cart3D has unique mesh resolution and quality requirements which make it particularly well suited to VSP and this approach. 
-     - In the 'Multi Sect Wing Geom' window, under the '​Gen'​ tab, enter 101 in the box to the right of 'Num Points:'​ \\ {{:​1_airfoil_points.png?​direct&​200|}} 
-  - Refine spanwise wireframe 
-     - Select the '​Sect'​ tab and then click one of the right-facing arrows under 'Num Interpolated XSecs' until there are 40 interpolated cross sections. \\ {{:​2_spanwise_points.png?​direct&​200|}} 
-  - Intersect components 
-     * VSP has the ability to intersect the triangulated wireframe components resulting in a single watertight body for a model. ​ In addition to providing input for high-fidelity analysis, this capability is commonly used to quickly calculated the wetted areas and volumes of a model. ​ 
-     - From the '​Geom'​ menu, click '​CompGeom (Union)...'​ \\ {{:​1_compgeom_menu.png?​direct&​200|}} 
-     - When the 'Comp Geom' window opens, click '​Execute'​ at the bottom of the window. 
-     * When complete, a wetted area and volume report will be displayed in the 'Comp Geom' window; this window can now be closed. ​ Notice in the 'Geom Browser'​ that VSP also added an intersected component mesh to the model. ​ The mesh shown on screen exactly corresponds to the information written to the file.  Note that the original geometry components are still present, but they have automatically been hidden. \\ {{:​2_compgeom_executed.png?​direct&​200|}} 
-   - Export intersected file 
-     * An intersected triangulated surface can be exported from VSP after CompGeom has been executed.  ​ 
-     - From the '​File'​ menu, select '​Export...'​. \\ {{:​3_click_export.png?​direct&​200|}} 
-     - From the displayed list of export options, choose either '​CART3d File (.tri)'​ or '​Sterolith File (.stl)'​. ​ \\ {{:​3.5_export_options.png?​direct&​200|}} 
-     - In the '​Select File' dialog, navigate to the save location and choose a file name.  When you are satisfied, click '​Accept'​. \\ {{:​4_compgeom_filename.png?​direct&​200|}} 
-  ​ 
-  ​ 
-==== Generating an Intersected Wireframe from the Command Line ==== 
- 
-The VSP interface is the best way to set up and adjust the wireframe resolution, but once that is established,​ you may want to generate the wireframe from the command prompt. 
- 
-To generate an intersected triangulated wireframe from the command line, enter the following command: 
- 
-<​file>​ 
-vsp -batch infile.vsp -compgeom -tri 
-</​file>​ 
- 
-or 
- 
-<​file>​ 
-vsp -batch infile.vsp -compgeom -stl 
-</​file>​ 
- 
-These commands will generate the unintersected wireframe and write '​infile.tri'​ or '​infile.stl',​ respectively.  ​ 
-  ​ 
-===== Next Steps ===== 
- 
-Once the intersected wireframe is complete, the next step is to prepare the file for analysis in Cart3D. ​ If you are using a STL file, it will need to be converted to a Cart3D TRI file; that process is detailed in the [[TutSTLtoTRI|STL to TRI Tutorial]]. ​ Otherwise, continue to the [[TutSetup|Cart3D Setup Tutorial]]. 
- 
-Or, feel free to jump to your topic of choice. 
- 
-  - [[OneraM6|Geometry Generation]] 
-  - [[MeshOverview|Mesh Generation]] 
-    * [[TutGenMesh|Isotropic Generated Mesh]] 
-    * [[TutUnint|Unintersected Component Wireframe]] 
-    * Intersected Component Wireframe (This Page) 
-  - [[TutSTLtoTRI|STL to TRI Conversion]] 
-  - [[TutSetup|Cart3D Setup]] 
-  - [[TutRunCart3D|Cart3D Execution]] 
tutcompgeom.txt ยท Last modified: 2018/04/01 14:41 (external edit)