dear sir,
I'd like to know why we use connecting node in caesar?? what is the meaning of the connecting node?? i have read the definition of the connecting node in caeser guide but i don't understand the meaning very well. please clarify my doubt..
Thank you

CNODES allow you to associate certain degrees of freedom between two nodes, with an optional stiffness value. (You can think of your arm/shoulder as a CNODE connection where the 3 translational DOFs are associated but not the 3 rotational DOFs.)

Take a look at the vessel modeling examples in the Applications Guide. Without the CNODEs, the connections to the vessel would be rigid.

Dear Richard,
Thank you for your reply, But I'd like understand very well the Cnode concept because is very important in Caesar stress analysis;
Then, I understand that the Cnode allow to associate degree of freedom between two related nodes;
For example, I built a cantilever starting at node 10 (anchor) up to node 20; At node 20 I will have a -Y displacement (due to weight)
Now, I insert at node 20 an anchor with C-node 21; The system will be the same of the first above where I have a -Y displacement (at node 20 and 21).
Now, I insert at node 20 a X restraint with C-node 21;I have a -Y displacement at node 20 only.

If my understanding is correct, the C-node allow relative movement between two related nodes. An anchor with C-node the relative movement between two related nodes in all direction are allowed.
Y restraint with C-node the relative movement in Y direction between two related nodes are allowed. Is it correct?


Please, explain me the practical meaning of the Cnode. What is it used for?

Yes, node 21 will not see the -Y displacement because you didn't connect it to node 20 in the Y direction.

I'm not sure I can explain this concept in this Forum, without pictures or sketches. Have you looked at the examples in the documentation for vessel nozzle and expansion joint tie-rods? These all contain examples of using CNODES.

Thank you Richard.