Ansys Q3D error: Found 6 bodies without triangles.

- February 10, 2020 at 4:05 pm
  
  YangMie
  Subscriber
  
  The errors indicate:
  
  Found 6 bodies without triangles. Please check the sizes of small bodies and the unit selection. Bodies without triangle are (10:52:19 AM Feb 10, 2020)
  
  Surface Mesh Generation Failed. (10:52:54 AM Feb 10, 2020)
  
  Simulation completed with execution error on server: Local Machine. (10:52:54 AM Feb 10, 2020)
  
  I am new to Q3D and didn't find much material about this software. Anyone can explain what the errors mean? And how to fix it?
  
  I cannot orientate the problematic bodies. When I right click on the error message, there is no option to show the incorrect body.
- February 10, 2020 at 8:09 pm
  
  YangMie
  Subscriber
  
  One error is about:
  
  Bodies failing to boolean correctly.
  
  Warning: These bodies do not boolean correctly in ACIS. The triangulation will be very complex on these bodies and the bodies that touch them. The mesher may not be able to correct all of them.
  
  However, this problematic body does not exist in the 3D model.
  
  Other 6 errors are:
  
  Empty surface triangulation.
  
  Warning: These bodies do not boolean correctly in ACIS. The triangulation will be very complex on these bodies and the bodies that touch them. The mesher may not be able to correct all of them.
  
  These 6 bodies can be found in the 3D model.
- February 11, 2020 at 4:15 pm
  
  YangMie
  Subscriber
  
  By the way, some times the error message shows: Bad quality triangles found in mesh. But the analysis can still run and end up with the simulation result. I don't know if the results are wrong due to the bad quality triangles. Anyone knows?
  
  How to improve those bad quality triangles?
- February 12, 2020 at 11:23 am
  
  Rob
  Forum Moderator
  
  Poor quality mesh will tend to lead to poor convergence and potentially incorrect results.
  
  If you click on help, do the tutorials show you how to generate good meshes?
- February 12, 2020 at 3:40 pm
  
  YangMie
  Subscriber
  
  Poor quality mesh will tend to lead to poor convergence and potentially incorrect results.
  
  If you click on help, do the tutorials show you how to generate good meshes?
  
  Thank you for your reply.
  
  However, actually the tutorial explaines what is 'good meshes' while doesn't demonstrate how to modify the model to generate good mesh.
  
  I went to Modeler> Model Analysis>Show Analysis Dialog>Objects, and tried to perform the surface mesh at every single object. The results under surface mesh column shows all 'good'.
  
  How can I know where the problem is?