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How to export mass and stiffness matrices of a large model?

JohLut
Hi,
 
up to now, I've applied the command EXTSEOUT (STIFFNESS MASS ASMBULK EXTID = 10 DMIGPCH) to get the matrices as a byproduct of the superelement reduction process.
This is ok for models of moderate size.
 
However, this approach seems not reasonable for rather large models (~1.000.000 nodes) as the intermediate files like *.DBALL are blown up to more than 16 GB and the computations take ages.
 
Since I'm not interested in the external superelement itself I'm wondering if there might be a simpler way to export the system matrices without extensive reduction computations.
 
Best regards,
Johannes
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  • 0
    The MATGPR will print them to the f06- that will make for a huge file... the MATMOD results in the matrices being punched to the pch file as DMIG matrices... this is usually what is desired.
     
    Also, if you add an "EXIT" command after the output commands, you can have the job 'stop' rather than continuing with the eigensolution, etc.
     
    Also, those commands aren't going to work by themselves, but require the MALTER line to place them in the correct location of the solution sequence.
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  • 0
    The MATGPR will print them to the f06- that will make for a huge file... the MATMOD results in the matrices being punched to the pch file as DMIG matrices... this is usually what is desired.
     
    Also, if you add an "EXIT" command after the output commands, you can have the job 'stop' rather than continuing with the eigensolution, etc.
     
    Also, those commands aren't going to work by themselves, but require the MALTER line to place them in the correct location of the solution sequence.
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