2020年2月18日 · NEi Nastran, or more accurate, NEi Software was acquired in 2014 by Autodesk and NEi Nastran became Autodesk Nastran. Today, as far as I know, you can't buy Autodesk Nastran because it is only sold as part of Autodesks products like Nastran-in-Cad. But is was originally developed to run on PC's.

2015年5月21日 · Recently our company has transitioned from using NEi Nastran to NX Nastran as our FE solver. In doing so we notice some significant differences in the results for the same models. Our models are fairly straightforward using linear static SOL101. One of the first differences that we noticed was...

2013年3月3日 · NASTRAN can do, but NEi Nastran does much more. In NEi Nastran the GLUE surface-to-surface contact is also handled by the Solver, which takes care of glue stiffness definition automatically. This is done at the Solver level with a PARAM or command. Glue is a simple and effective method to join meshes, which are dissimilar.

2006年7月7日 · For example, contact analysis in Nastran (of any flavour) was possible using the CGAP element, but this is really limited to a non-sliding contact. To overcome the limitations of the CGAP element, MSC have recently introduced a more general contact capability which actually calls up the Marc solver in the background!

2003年3月6日 · If I make a model by Femap and use parabolic elements, NEi/Nastran gives me a warning 'T2004' and it is caused by quad8-elements. If I use the same model and make an analyze by MSC/Nastran -> No problem. How this is possible?

2003年2月6日 · For solid models NEi tends to be faster and in this case it was more like 5 times faster for NEiNastran. For nonlinear NEi seems to be faster but for dynamics MSC was faster but the differences were not that great. I think that overall for shell structures MSC will be faster and for solids NEi will be faster.

2012年2月1日 · I'm new to FEMAP/NASTRAN (well, new to NASTRAN for that matter). I've been self-teaching for a short while but still long way to go. Ok, getting to the point. I'm modeling a bi-material structure, made of two different orthotropic materials (both are …

2009年3月3日 · With NX NASTRAN the card "PARAM,AUTOMPC,YES" relieves the need to carefully define rigid elements (or MPCs) so as to not have a conflict of the m-sets between elements. In addition, any redundant constraints will be eliminated.

2007年10月15日 · 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.

2011年6月27日 · I had a question concerning the DMIG input for NEI NASTRAN. We need to translate the matrices from an NEI NASTRAN file to another system. Does anyone know the NEI NASTRAN format for the DMIG entry? It seems to be somewhat different than the NX NASTRAN entry. Thanks for your help. Andrew