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How to best handle quilts made in Pro/E

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Old   September 30, 2011, 11:00
Angry How to best handle quilts made in Pro/E
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Tony DelNegro
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I have some complex geometry made with surfacing in Pro/E. When I try to import the file into CFDesign using the Granite configuration I get the standard error "PTC Granite kernel cannot process the quilt geometry". When I try the Pro/Mechanica configuration I get the standard tesselation errors.

I've tried exporting the files as NEU & STEP and then re-importing them but still end up with the same errors, sometimes even more.

How are we supposed to deal with geometry that is not simply prismatic?
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Old   October 7, 2011, 03:10
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yoav
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he Big

well i used to be a Pro/E user not to long ago until i thanfully switched back to SW in my new work place ...

in any case what i found useful when i encountered your problem in the past was (and i emphesis this) -
1. save the file as a parasolid or STEP.
2. open the file with SolidWorks (most work places some sort of version, so that they can open or manipulate files from contractors that use SW without a problem)
3. save the file again this time useing SW as an X_T (parasolid)
4. then opening the in CFDesign

i know it is an ugly work-around... but it worked and its the best i can offer
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Old   October 7, 2011, 09:18
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Tony DelNegro
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Thanx yoavmatia. I don't have a SW license available unfortunately. (since I've always used Pro/E I find myself on the other side of the SW/Pro-E fence)

I did get a response from a tech that suggested this using a shrinkwrap to smooth out any weird surfaces or to make sure when I export the STEP to only export 'solids' and no surfaces. I haven't tried this yet. And unfortunately I don't have shrinkwrap in my base package.

He also said there is new technology in CFDesign 2012 called Fusion that helps with this sort of problem. I don't have that either, though.
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Old   October 15, 2011, 22:53
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Derrek Cooper
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Hello Tony.. If you have access to Autodesk Simulation CFD 2012(former CFdesign), Fusion installs automatically. Sounds liek the issue is that you need to create solid geometry from the surfaces
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Old   October 17, 2011, 08:50
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Tony DelNegro
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Hey Derrek. I believe all the surfaces have been used to create solid geometry. There were some cosmetic features that were suppressed, but the error still remains. I don't see any quilts visible at all in the model.

Unfortunately we cannot afford maintenance at the moment so we are stuck on 2010/2011. I think I've had the same issue before and have sent it in to BRNI for help and they have fixed the problem, but I don't really know how they did it.
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Old   November 5, 2011, 11:04
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Zachariah Swetky
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CFdesign can process quilt geometries using the "mechanica" kernel. It is an option when you start CFdesign from Pro/E. I used it extensively for 2-D modeling. I can't speak for 3-D modeling, but in 2-D, using this option means that Pro/E meshes your model instead of CFdesign. I found that this configuration was quite touchy in the Spring 2011 version, but it worked. Most of the time in 3-D, I have simply had to make my own 'clean' geometry for CFdesign.

-Zachariah
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Old   November 7, 2011, 09:17
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Tony DelNegro
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Zachariah,
I am aware of the Mechanica option as I stated in my original post. Unfortunately, I get errors with that method too. I would think that using the Mechanica option would be the most reliable but that doesn't seem to be the case.
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Old   November 7, 2011, 10:28
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Zachariah Swetky
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Quote:
Originally Posted by BigBaboo View Post
Zachariah,
I am aware of the Mechanica option as I stated in my original post. Unfortunately, I get errors with that method too. I would think that using the Mechanica option would be the most reliable but that doesn't seem to be the case.
I see. Occasionally, ramping up the model accuracy in Pro/E helped me get geometry to mesh. If you want a science project, you could probably use OpenFOAM with snappyHexMesh and an STL file. The learning curve is a bit of a challenge through. Best of luck.
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Old   November 7, 2011, 12:47
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yoav
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Hi Big

well, like i said as the first reply to the thread.

i used to be a Pro/E for 2.5 years, thanfully switched back to SW

i know your on the other side ot the Pro/E VS. SW fence.
however, since i see you are still stuck with the same problem!?!

i would strongly recomend you take the the solution/work-around i used to do when ever i stumbled to your exact problem... say what you may - it works.
(see my initial reply up in the begining of the thread)
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Old   April 4, 2012, 14:44
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Mike Stroup
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interesting...

I have been doing a lot of external flows extensively using surfaces... (wings, fuselages and tails)...
the Pro/E model has a lot of surfaces used for construction.. on hidden layers.. and I get the same warning when I start up... but none of the domain that gets meshed is defined by a surface... so I click "OK" and carry on.... (Merged surfaces are used to cut [via solidify/cut] from the domain)

can you post any screen snaps?
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