search

Alneos / vega

Finite element format converter
GNU General Public License v2.0
23 stars 9 forks source link

Infinite node in RB2 #34

Closed ThomasAbballe closed 3 years ago

ThomasAbballe commented 3 years ago

Hi all

When translating a Nastran RBE2 into a SYSTUS 3D model, Vega (rightly) creates a node to host the rotation of the master node. In the current version (SVN3775), this node coordinate are infinite

In the log, you can see a warning: Writing warning in Nodes: Infinite node with Id: 9999999

In the ASC file, you can see: 9999999 0 0 0 2 0 -1.79769313486232e+308 -1.79769313486232e+308 -1.79769313486232e+308

This does not cause problem for the SYSTUS solver, to my knowledge. It's just a bit distressing when looking at the model in a viewer. And as I can manually change the coordinates to the correct ones, it a very small bug. Nonetheless, the created node should have the same coordinate as the master node.

I add here a small example. Note that translating this example to 3D has no physical sense: it's a shell model. I'm just doing it to bring up the error. InfiniteNodeRBE.zip

ThomasAbballe commented 3 years ago

Solved by 1397a8e780f52a0e3d4277d9b37e97fe8f2cc3bc