CFD Online Discussion Forums - Compress PID

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Compress PID - Python script

Hey Guys!
I would like to ask for a help.
I need a Python script to Compress all the PIDs with same thickness in a model. Always keep the lower PID-ID and put all the Entities from the other properties to the one is kept.

I have found a easy way to compress Materials with the same name and/or same values, but coudnt find this feature for PIDs.
Mostly we are working with NASTRAN or LS-DYNA.
I hope someone can help me with it.
Thanks in advance!

i don't know how to do this by scripting.
but you can show only elements/entities/etc with the same thickness. then select all shown entities/elements/etc->modify->PID->set some
and compress=)
easy=)

but be carfully, because you will have problems with hiding/showing some entities if you keep only 1 PID... but if you doesn't work with huge assembles it isn't a issue to you=)

Hi!
Thanks for the reply.

This is actually what we are doing, but i need a script to do it with a single click.
Btw i'm working on the script, but i'm not so good with python so i'm kinda suffering to write it.

Sometimes our single-part models have several PIDs with the same tickness and if we have like 30 different thicknesses, then making the compression manualy (like you assumed) takes time.
I just need a script for this to do it in secounds instead or minutes.

it takes secund, you are quite right-it is ot 1 click.
but ANSA is good in hide/show possibilities!
in data manager sort by thickness->show only and do that i write =) it takes 10-15 seconds if you have a 100 pids with the same thickness=)
but if you want to scripting...) it will be great.)

Hi,

You can try something like:

Code:

# PYTHON script import os

 import ansa

 from ansa import *

 



 def main():

     deck = constants.NASTRAN

     shell_props = base.CollectEntities(deck, None, 'PSHELL')

     props_with_same_thickness = {}

     for prop in shell_props:

         vals = base.GetEntityCardValues(deck, prop, ['T'])

         prop_thickness = vals['T']

         props_with_same_thickness.setdefault(prop_thickness, [])

         props_with_same_thickness[prop_thickness].append(prop._id)

     

     for key, values in props_with_same_thickness.items():

         if len(values) >= 2:

             print('Merging PIDs with thickness: ', key)

             print('-------------------------------------------')

             min_id = min(values)

             min_pid = base.GetEntity(deck, 'PSHELL', min_id)

             for x in values:

                 if x != min_id:

                     current_pid = base.GetEntity(deck, 'PSHELL', x)

                     shells = base.CollectEntities(deck, current_pid, 'SHELL', recursive = True)

                     print('Assigning SHELLS of PID: ', x, ' to PID: ', min_id)

                     for shell in shells:

                         base.SetEntityCardValues(deck, shell, {'PID':min_id})

             print('-------------------------------------------')

     

     base.Compress({'Properties':1})

 



 



 if __name__ == '__main__':

     main()

Best regards,
Greg

Thank You very mutch!

It's working like a charm!

:)