Using PLOAD2 with THRU

[clarkbr...@gmail.com]

Steve (et al):

I have been using add_pload2 with a pressure and a single EID. pynastran makes a line like

$RIGHT OUTBOARD WING DISTRIBUTED PRESSURE LOAD ON UPPER SURFACE                
                              PLOAD2         4.0064599    3137    THRU    3137

See the THRU has EID2 = EID1. MSC Nastran doesn't complain, but NX Nastran cries about

 *** USER FATAL MESSAGE 316 (IFPDRV)
     ILLEGAL DATA ON BULK DATA ENTRY PLOAD2  
 PLOAD2         4.0064599    3137    THRU    3137

Both QRGs say 

for the “THRU” option,
EID1 < EID2

Can you make pynastran stop doing that? I need to start running NX Nastran more.

Sincerely,

Clark

[clarkbr...@gmail.com]

I haven't seen any responses at this point and it's been a month. That is unusual. Did I do something wrong in posting it?
Clark

[Steven Doyle]

I forgot about it. I work a lot and anything related to that is more of a priority. This is an unfunded hobby project. I usually get to it on a couple of issues on the weekends, but after a months I've forgotten.

I also don't have an IDE right now, so that doesn't help.

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[clarkbr...@gmail.com]

Steve, I know there is a correct way to submit code changes, but I dunno how to do that. I'm in v4.1.1.

I think I chased this to static_loads.py class PLOAD2, function raw_fields( ) where it decides if the list of eids is sequence with step 1. It uses numpy diff( ) to do this. In my case, [eids] is a single element number and diff can't diff that. It returns diffs as a []. Then np.all(diffs == 1) incorrectly answers something interpreted as True.

I changed line 2330 from

if np.all(diffs == 1):

to

if len(diffs) !=0 and np.all(diffs == 1):

And the bdf does what I want:

PLOAD2         4.0055272    3137

I ran a simple check where I forced my eids to be two sequential element numbers, and it correctly wrote

PLOAD2         4.0055272    3137    THRU    3138

So, I hope that helps and there isn't more to it than that. I apologize for not following due process.

Sincerely,

Clark