Making a Finer Analysis of Clash Command Results

This task explains how to apply Clash command visualization filters and read detailed results.

Insert the following sample model files: ATOMIZER.model, BODY1.model, BODY2.model, LOCK.model, NOZZLE1.model, NOZZLE2.model, REGULATION_COMMAND.model, REGULATOR.model, TRIGGER.model and VALVE.model.

They are to be found in the online documentation filetree in the common functionalities sample folder cfysm/samples.

Switch to Design Mode (Edit > Representations > Design Mode).

  1. (Optional) To enable a finer analysis at element level, ensure that the detailed computation mode is set to Element level. To do so, select the Tools > Options..., Digital Mockup command (DMU Space Analysis > DMU Clash Detailed Computation tab).

    Element level: is the default detailed computation mode.
    Triangles identifying contacts and clearances, intersection curves identifying clashes and the penetration depth or minimum distance are computed and displayed.

    Note: The graphics display and storage of the triangular representation is costly and may adversely affect performance.

  2. Select Insert > Clash from the menu bar or click Clash  in the DMU Space Analysis toolbar to run a check of type Clearance (3mm) + Contact + Clash between the valve and all the other products in the document (Selection against all).

  3. Click Apply

    The Check Clash dialog box expands to show the results of the initial computation. The number of interferences detected along with the type is indicated in the dialog box: 4 interferences have been detected.

    Note: The results given in the various tabs of the dialog box correspond to the worst case.

  4. Close the Preview window and click Results Window in the Check Clash dialog box to view the selected interference in a dedicated viewer. The Interference Results window appears displaying the products in conflict only.

    To open the Preview window again, click Results window a second time. The Results Window is closed and the Preview window is restored.

    If however, you close the Results Window (using the Close button in the title bar), the Preview window will not be restored.

  5. Click the List by Product tab to display conflicts associated with products.

    Results are organized by product in the List by Product tab. There may be more than one conflict per product.

  6. Select the product Valve.1, then More>> for a finer analysis. The dialog box expands to include Detailed Results and Visualization boxes.

  7. Click Product in the Visualization box to obtain an analysis by individual product.

    The first conflict (a clash) between the valve.1 and body1.1 is identified in the Detailed Results box and is visible in the Results window.

    X,Y,Z coordinates of the penetration vector are given.

    • The origin of the penetration vector is the center of inertia of the intersection curve. 

    Note that this vector may sometimes be located outside selected products. 

    • Special case: when one product is completely included in another, the origin of the penetration vector is the center of the local axis system of one of the products.

    If an intersection volume is requested (Tools > Options..., Digital Mockup  > DMU Space Analysis, DMU Clash - Detailed Computation tab), the volume is also given with its inertial box.

    The valve product is in conflict with four other products (body1, body2, the lock and trigger). Previous and next icons in the Detailed Results box let you browse through them.

    The detailed computation has also identified three different pairs of elements within the first pair of products (valve and body1).

  8. Click Element in the Visualization box to obtain an analysis at element level. The Detailed Results box is updated and identifies the elements involved in the conflict. In our example, elements *SOL276 (Valve) and  *SOL1373 (Body1).

  9. Click Next to view detailed results for other pairs of elements in the same two products. You will notice that a Contact interference is detected for the second pair of elements.

  10. Browse through other pairs of elements in other pairs of products using Next and Previous.

  11. (Optional) export as clash results in the desired format from the following list:

  12. (Optional) Publish your  clash result in HTML

  13. Click OK to exit when done. The interference definition and results are kept as specification tree features.

    Notes:

    • The numeric value (minimum distance or penetration depth) of the current result is kept when you exit the command. If you edit the results, the system re-displays the last current result analyzed.

    • Clicking Deselect in the Check Clash dialog box removes the current results from the selection.

    Using Visualization Filters

    • All products: displays all products selected in the list.

    • Product: displays products involved in the current conflict.

    • Element: displays elements involved in the current conflict. Pairs of elements are listed in the Detailed Results box and can be browsed using the Next and Previous options.

    Note: The Element  option is only available if the detailed computation mode is set to Element level. This option is particularly useful when in Design mode.
     

    • Show / Show drop-down box: a variety of combinations lets you show, hide or place in low light the geometries of the two products involved in the conflict. This option has no effect in the Preview window.

    • All cases drop-down box: lets you select the graphics representation you want to see displayed (All cases, None or Worst cases). If Element is selected, the Worst case option is not available.

    Note: The effects of all options, except the Show / Show drop-down box, can be seen in the Preview window.