spider on caelinux

Hello,
I write to get answers to two questions:
1. how do I simulate the presence of a bearing fitted to a shaft with CL?
2. how do I check if the stiffness of the FEM shaft is the same real shaft?

With other software between points on the surface and a point on the axis of the shaft were connected in a cloud of stiff links called spiders. I remember that there was an automatic function to achieve the spider. In CAELinux as we tackle the problem?
thank you very much
Salvatore

Hello,

Please remember that caelinux is "only a linux distribution" which by itself do not make any FE modeling. I did no get what you called "CL", I suppose it stands for "caelinux".
Then, I suppose you might want to use the code_aster for FEmodeling.

What you call spider elements are as far as I remember linear kinematics relations expressed between a master dof and slave dofs:
-in the gui version of one commercial programm, master dof is viewed through what they call pilot node or remote point and slave dofs are seen through a scoped geometry -surface, line, vertices...-,
- then, the software tranform it into rbe3 elements as you would do at script level,
- in the solver, internal constraint equations are automatically created to depict the linear relations between dofs.

This being said, and if you confirm we are dealing with the same topic, for code_aster, you should have a look at this thread www.code-aster.org/forum2/viewtopic.php?pid=33693 .

The keyword you need are liaison_ddl with specials parameters I think.

I don't know if upper level concepts are integrated in the gui salome meca + efficas (I don't think so )

Good luck.

If you make comparisons between commercial software and code_aster on this topic, I would be very interested to view some results