[Solved]CalculiX FEM Freq Analysis: No nodes found in Frd file.

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seppelw
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[Solved]CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by seppelw »

Hello,

in my case the error is raised wothout modifying aynthing in the inp file, so I do not understand what's wrong.

I guess I have a similar problem then with https://forum.freecadweb.org/viewtopic.php?f=18&t=31076 . However, I do not know the files good enough/the explaination is not exactly telling what needs to be modified in the file in order to get it running so that the results are stored.

Could someone please tell me what nees to be modified, or modifiy it and I can do a diff to understand what the problem is?

Thanks a lot.

Best Regards, Seppel

P.S.

OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.20802 (Git)
Build type: Release
Branch: master
Hash: f4279f1bea8377a7ef63f7f4c69b67159d498965
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: German/Germany (de_DE)
Attachments
FEMMeshGmsh.inp.txt
What's wrong in this file? What needs to be modified?
(846.84 KiB) Downloaded 46 times
FC_ReportView.txt
(1.67 KiB) Downloaded 45 times
FC_MechAnalysisLog.txt
(4.92 KiB) Downloaded 46 times
Last edited by seppelw on Fri May 01, 2020 2:26 pm, edited 1 time in total.
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johnwang
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by johnwang »

Where is your Frd file?
Last edited by johnwang on Fri May 01, 2020 10:14 am, edited 3 times in total.
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bernd
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by bernd »

Without a FreeCAD gile it is not possible to say what is wrong. Would you post your FreeCAD file? To make it smaller you could clear the mesh (clear it not delete the object) if needed.

cheers bernd
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seppelw
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by seppelw »

Hello Bernd, Hello John,

it created the frd, but it is too large to attatch it. I attached the Freecad File. Is that ok?

Thank you very much.

Best Regards, Seppel
Attachments
FEMTEST.FCStd
(683.93 KiB) Downloaded 50 times
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johnwang
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by johnwang »

No material object defined in the analysis.
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seppelw
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by seppelw »

Hello John,

as far as I know, if there is only one MechanicalSolidMaterial with no solid assigned, all defaults to that, at least that's what the maual say's?

But anyway, I assigned the Solid to the MechanicalSolidMaterial, same problem. So that is not the Solution to the Problem.

Any more ideas?

Thank you very much.

Best Regards, Seppel
Attachments
FEMTEST.FCStd
MechanicalSolidMaterial now assigned.
(684.11 KiB) Downloaded 48 times
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johnwang
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by johnwang »

Sorry, I am runing an old version. 0.19.18778(git)

My newest version which I downloaded today has no CalculX in it.

I give up.
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seppelw
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by seppelw »

Hello John,

no reason to give up, I use version FreeCAD_0_19_20802_Win_Conda_vc14_x_x86_64, which is the latest on the website.
I can run the static FEM with no problems, and I was also able to run more simple examples with the FEM Frequency Analysis,... so it works in some cases.

Why it does not work in this case, I'd really like to find out because it seem's it's a Problem many people will have I guess.

Thanks a lot.

Best Regards, Seppel

P.S. Here are are the links.

https://github.com/FreeCAD/FreeCAD/rele ... g/0.19_pre
https://github.com/FreeCAD/FreeCAD/rele ... -x86_64.7z
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johnwang
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by johnwang »

Mine is 20839.
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fandaL
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Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Post by fandaL »

Frequency is just above requested range, so no output is made by ccx.

In *.inp file you can delete the range. Instead of

Code: Select all

*STEP
*FREQUENCY
10,0.0,10000.0  
(which limits frequency search to 0-10000 Hz) Use only

Code: Select all

*STEP
*FREQUENCY
10
which will search for 10 lowest frequencies up to "infinity". (Isn't this by default written by FreeCAD?)
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