Surface meshing problem
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Surface meshing problem
Hi!
My model is deck and also surface from space claim with share topology and I have tried to modal analysis in freecad.
But while meshing with Netgen my surface meshes is independent so ı even can not handle solution due to the mesh fail.
so how can ı mesh whole model with surface mesh and with together?
OS: Ubuntu 20.04.2 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git) AppImage
Build type: Release
Branch: (HEAD detached at 0.19.2)
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: Turkish/Turkey (tr_TR)
My model is deck and also surface from space claim with share topology and I have tried to modal analysis in freecad.
But while meshing with Netgen my surface meshes is independent so ı even can not handle solution due to the mesh fail.
so how can ı mesh whole model with surface mesh and with together?
OS: Ubuntu 20.04.2 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git) AppImage
Build type: Release
Branch: (HEAD detached at 0.19.2)
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: Turkish/Turkey (tr_TR)
Re: Surface meshing problem
Moved to FEM forum.
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Re: Surface meshing problem
very difficault to guess without a file? Would you post a file which shows the problem
Re: Surface meshing problem
Hi,
From space claim file export to freecad with iges file type all surfaces.neither meshed correctly nor handle solution.
And also ı have tried export step file to freecad but same error.All calculix results 0.
I can solve with solid geometry for same geometry.But surface, ı could not.
Thanks for eveything.
- Attachments
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- all results is zero
- Ekran görüntüsü 2021-09-17 11-30-22.png (449.78 KiB) Viewed 2675 times
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- independet mesh view
- Ekran görüntüsü 2021-09-17 10-58-55.png (423.3 KiB) Viewed 2675 times
Re: Surface meshing problem
same again with picture we could only guess. You wuld need to give us the date to test with ...
Re: Surface meshing problem
So the mesh was generated correctly after all (since you already have the results).
Try clicking on CCX_Mode_Results, it should show you the eigenfrequency and then you can double click it to see displacements (just keep in mind that those aren’t the physical values).
Try clicking on CCX_Mode_Results, it should show you the eigenfrequency and then you can double click it to see displacements (just keep in mind that those aren’t the physical values).
Re: Surface meshing problem
Re: Surface meshing problem
You should rebuild the model for the analysis, it has some intersecting surfaces that can't be meshed properly:
Re: Surface meshing problem
NewJoker wrote: ↑Fri Sep 17, 2021 4:19 pm You should rebuild the model for the analysis, it has some intersecting surfaces that can't be meshed properly:
The main problem is actually exporting surface. While exporting the model -my model is the only surface- which file format is the best suited and intersect correctly?
I have more complicated geometry so ı could not make a model in freecad.I have to export another modeler.
model.JPG
Re: Surface meshing problem
I don't think it's because of the export format, standard STEP should work fine in all cases. Most likely the problem lies in the way the surfaces were modeled in this external software.