extracting results from f06

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NAIMI Fakhreddine

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Apr 28, 2015, 9:47:01 AM4/28/15
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Hi,
the PyNastran is very interesting.
recently i'm using Patran/Nastran a lot, and i'm only familiar with the .bdf & .f06 files
i was looking for a routine to extract the results such as (MaxRatio, Oloads,  Fatals,...), and i'm wondering if this Module (PyNastran) is able to.
Thanks

Steven Doyle

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Apr 28, 2015, 11:48:00 AM4/28/15
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The F06 reader is no longer distributed with the release versions of pyNastran (at least for now).  It's a much harder file to parse, it's slower, it supports fewer results, and there are no major results that it has that the OP2 reader does not have that the F06 reader supports.  The F06 reader doesn't support max ratio/oloads.  While you won't get the error message, the OP2 does determine if there was a FATAL.

All you need to make an OP2 is add:
$ -2 will also work
PARAM,POST,-1
to the BDF

If you're after results (e.g. static/transient displacement, spc forces, mpc forces, applied loads, stress, force, strain energy, grid point forces, weight, eigenvalues, eigenvectors), then the OP2 can read it.  It supports multiple subcases, superelements while being 100x faster.

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NAIMI Fakhreddine

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May 3, 2015, 2:08:33 PM5/3/15
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Thank you for answering,
i'm wondering what's the use of fhe F06writer, how would it help ?

Steven Doyle

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May 3, 2015, 5:55:34 PM5/3/15
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It mainly lets developers verify that they read the OP2 correctly.  If you wanted to plug a 3rd party solver in and convert the data format, you could use it for that as well.
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