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Subject: Re: importing 3D models to ANSYS
Author: Sigurd Steffenssen
Date: 2001-01-29 07:33:00

Alexandros,

Importing to Ansys via the IGES import option has worked OK for me when
taking following precautions:

1. Try defeature as much possible in the CAD-system (just talk to the CAD
guy, and tell him what features to suppress). That is suppress small
fillets, holes, chamfers etc.; suppress/remove all features that are of no
interest in your FEA.

2. If the geometry is an assembly, individual parts should be spaced out
so interfearing surfaces don't create troble later in the import process.
This should be done in the exporting CAD-system.

3. When the above have been carried out, the IGES-export from the CAD
system may be executed.

4. When importing the geometry, remember to use the "alte no defeature"
option in the IGES dialog box in ANSYS. By choosing this option, entities
may be operated on as if they are native ANSYS entities after the
translation. I've experienced trouble with the "Default defeature" option;
that is entities do not behave like native entities in ANSYS ( some vital
menues are "greyed out" after the translation has been carried out).

5. When stage 4 is completed, move the individual parts/volumes in there
correct positions and continue with ANSYS preprocessor ( dividing volumes
if needed, meshing etc.) to complete your FE Model.

Of course, if geometry is "simple" the above procedure is not very
effective and consequently ANSYS modelling tools should be used directly.
However, if geometry is "complex", you may save many hours compared to
remodel everything from scratch in ANSYS.

Hope this helps.

Regards,

Sigurd O. Steffenssen,
Liaaen Engineering, Norway

asiganos@e...

ee.auth.gr To: xansys

cc:

29.01.01 12:51 Subject: [XANSYS] importing 3D
models to ANSYS

I have a general question in handling 3D models. The question is
about importing 3D models from a CAD system rather than creating them
in the preprocessor. What I'm afraid of is that:
a) I will face difficulties in meshing the model and I will have to
split volumes to sub-volumes to make meshing easier
b) Though ANSYS has some tools to "delete" useless details, I don't
know how effective they are.

Can anyone experienced in this area give me his opinion in importing
3D models in ANSYS? Is it effective or I will end up re-creating the
model in the ANSYS preprocessor?

The reason I'm asking is that we are thinking about purchasing the
corresponding ANSYS Connection Product for SolidWorks.

Thank you in advance,

Alexandros Siganos
Department of Mechanical Engineering
Aristotle University of Thessaloniki

Posts possibly associated with message #20568AuthorDateScore
20567importing 3D models to ANSYSasiganos@2001/01/29 
20568Re: importing 3D models to ANSYSSigurd Steffenssen2001/01/29 
20569Re: importing 3D models to ANSYSMartin Liddle2001/01/29 
20576Re: importing 3D models to ANSYSParis Altidis2001/01/29 
20599Re: importing 3D models to ANSYSjeff.schwalm@2001/01/29 
20609Re: importing 3D models to ANSYSenrico.zago@2001/01/30-5