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Nonlinear transient impact analysis with contact
automechanicar, you didn't mention which solver you were using... To really perform an impact such as a drop test, you'd want to use SOL601 or SOL701 in NX Nastran, do you have access to these modules? If not, you could perform a dynamic response, but you'd have to manipulate the data a bit... -
multiple processor
bdf stands for bulk data file, it's just an extension... As far as nastran is concerned, the extension doesn't matter as long as the input file is in the proper nastran bulk data format... Basically, the syntax to manually submitt a job with nastran is: nastran <filename> <option1> <option2>... -
Features of NX Nastran compared to NEi Nastran
NX Nastran "basic" would be SOL106, probably the weakest of the lot (except for Mechanica), as you pointed out you'd need the advanced non-linear, SOL601, to perform surface-surface contact, although you might be able to get away with gap elements. Both Abaqus and Marc would definitely do a... -
Unable to recover NX Nastran result file
If you're running NX Nastran 32-bit, you should be able to assign about 1.3GB of RAM on Windows, and maybe 1.5GB on Linux, but not more... With NX Nastran 64-bit, things get much better since you can assign 8GB-10GB easily... For a model like this, I would definitely use the elemental... -
Features of NX Nastran compared to NEi Nastran
Which solver are you thinking of using? Forming might need a more specialized code than a generic non-linear code like SOL106 (I'm thinking Abaqus, LS-Dyna, Marc or Adina). -
LGMASS Problem
My first guess would be a units mismatch, i.e. the force you are applying is not correct... The large mass method should work just fine and should give similar results... -
Features of NX Nastran compared to NEi Nastran
Both MSC and NX Nastran cover as much, arguably even more if you think about DMAP programming. The surface-surface contact in NX Nastran is pretty darn good, and is not limited to statics, it is also able to deal with modes and dynamics response... All the NE animations can definitely be done...
