NX and NASTRAN, different result with IGS import or NX part
NX and NASTRAN, different result with IGS import or NX part
(OP)
Dear all,
I've posted on UG/NX forum but it's probably more appropriate here, sorry for double posting
I'm quite new with NX/NASTRAN(7.5) package but I have a small FEA background.
I'm doing some practical testing to learn how to use NX with NASTRAN.
I'm getting bogged on a simple I beam made with 2D shell elements.
Simulation is quite simple : I beam with pivot ends and tranversal force. It's just bending !
When I draw my beam with an other CAD software(Rhino) and import IGES in NX simulation, everything run ok, hand calculation give same result.
But when I draw my beam with NX (I tried everything in a part or assembly, same result), with the same way of preprocessing, result are stranges with different stress on top or bottom (near 20% difference!).
h ttp://file s.engineer ing.com/ge tfile.aspx ?folder=dc 9ef321-b62 a-4b98-8db 6-c15445a4 fe03&a mp;file=nx _beam_2D_e lement.JPG
Thanks for your help
Regards
Mitch
I've posted on UG/NX forum but it's probably more appropriate here, sorry for double posting
I'm quite new with NX/NASTRAN(7.5) package but I have a small FEA background.
I'm doing some practical testing to learn how to use NX with NASTRAN.
I'm getting bogged on a simple I beam made with 2D shell elements.
Simulation is quite simple : I beam with pivot ends and tranversal force. It's just bending !
When I draw my beam with an other CAD software(Rhino) and import IGES in NX simulation, everything run ok, hand calculation give same result.
But when I draw my beam with NX (I tried everything in a part or assembly, same result), with the same way of preprocessing, result are stranges with different stress on top or bottom (near 20% difference!).
h
Thanks for your help
Regards
Mitch





RE: NX and NASTRAN, different result with IGS import or NX part
On NX Nastran, I would compare the two files that contain all the model details from the two methods you mentioned. I don't know what file types they are since it is NX Nastran and I am a MSC Nastran user.
If you would like, you can post your files here and I can skim them to note any differences.