Smitc solver – Where are the Eigenfrequencies?

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Captain Slow
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Smitc solver – Where are the Eigenfrequencies?

Post by Captain Slow »

Hi Guys,

I have just been looking at the tutorial ''Smitc solver – Eigenmodes of an elastic plate'' which seems to have run fine (I have the displacements for the 10 modes simulated) but I cannot find where the eigenfrequencies are displayed. Can you point me in their direction?

Thanks,
John
raback
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by raback »

Hi John

ARPACK outputs by default the eigenvalues, lambda. For a typical equation these are related to the frequency f by lambda=(2*PI*f)^2. SaveScalars can output this directly to a given file when you reques 'Save Eigenfrequencies = Logical True'.

-Peter
Supituki
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by Supituki »

Hi,

I've been trying to save the eigenvalues but i've been unsuccessful. I have tried several time writing the commands in different places but ElmerSolver Crashes.

I wrote the following:

'Solver 2';
'Equation = SaveScalars';
'Exec Solver = After saving';
'Procedure = "SaveData" "SaveScalars"';
'Save Eigenfrequencies = Logical True';
'Filename = "Eigenvalues_name .dat"';
'End';

Is there something wrong? I could not manage to find a solution.

Thanks in advance

Supituki
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by raback »

Hi Supituki

I hope you wrote that to the solver input file (.sif) and without the special characters: ' and ;

-Peter
Juha
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by Juha »

Hi,
i think it's a ElmerSolver bug, i'll commit a fix in a minute.
Juha
Juha
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by Juha »

...done. The eigen values are also,btw., shown in the ElmerSolver terminal output.
Juha
Supituki
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by Supituki »

Hi

Thank you for your fast answer.

I'm using Elmer in Windows installed from the binary, and since I am working with a restricted computer, I cannot install "MinGW and MinSYS".

How often are the binaries in the SourceForge actualized?

Thanks for all

Supituki
foadsf
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Re: Smitc solver – Where are the Eigenfrequencies?

Post by foadsf »

This is an ancient post, but it is indeed possible to install MSYS2 on a Windows machine without admin privileges, as a portable package.
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