Creating Case Control Deck

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miguel...@gmail.com

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Feb 8, 2021, 9:02:13 AMFeb 8
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Hi

I loaded the bulk data from a bdf and now I want to create the case control deck. If I use bdf.case_control_deck it appears the line 'BEGIN BULK', but when writing the bdf it does not appear. I will also want to add the 'SOL 101', 'CEND', 'SPC = 1', etc...

¿Can I create the executive control and case control from scratch from within pynastran?

Thanks!

Alejandro Stewart

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Feb 8, 2021, 9:20:08 AMFeb 8
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Hello,
I was able to create a single subcase (only needed one but I think it may be similar) with the following:
new_model.create_subcases([1])
sub_1=new_model.subcases[1]
sub_1.sol=101
sub_1.add('SPC',1,[],'STRESS-type')
sub_1.add('LOAD',2,[],'STRESS-type')
sub_1.add('FORCES',1,['PRINT','PLOT'],'STRESS-type')
sub_1.add_set_from_values(1, list(props.keys()))
new_model.update_solution(101,'',1)
to get:

SOL 101
CEND
$CASE CONTROL DECK
SUBCASE 1
    SET 1 = 1 THRU 30
    FORCE(PRINT,PLOT) = 1
    LOAD = 2
    SPC = 1
BEGIN BULK

Hope that helps

Alejandro

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miguel...@gmail.com

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Feb 8, 2021, 12:57:03 PMFeb 8
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Thanks Alejandro, but I still don't get anything printed to the bdf file (when I use write_bdf method). There are only modifications in the bulk data entries.

Alejandro Stewart

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Feb 8, 2021, 1:14:14 PMFeb 8
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Without seeing your code it is difficult, but my guess is that maybe you imported the model with punch=True

Steven Doyle

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Feb 8, 2021, 1:23:50 PMFeb 8
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That looks like that is the case.  You need to set:
  model.punch = False

That should probably be handled by create_subcases.

miguel...@gmail.com

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Feb 9, 2021, 3:28:11 AMFeb 9
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Thank you! Indeed was the because the punch=True. It is now solved using model.punch = False.
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