The CNODE is an association of degrees of freedom. If you can remember this phrase, CNODES are easy.

The short answer to your question is "Yes", but I wouldn't do it that way. Instead, try this:

- Assuming you just want to displace the node, don't specify restraints at all, just define the displacements. This is because a displacement is a boundary condition, just like a restraint is a boundary condition. So if you want to displace a node (restraint) in XYZ, you would specify displacements in these three directions.

- If the restraint is a nozzle, all 6 degrees of freedom are restrained. If the nozzle displaces, you can specify the XYZ values as above, or maybe just XY. However, the other non-displaced degrees of freedom must have their displacement magnitude set to zero - otherwise these degrees of freedom are free - which is not the case for a nozzle.

- There are a number of examples in the Applications Guide on the use of CNODES. Check the section on modeling Vessel Nozzles.

CNODES are a very powerfull modeling construct in CAESAR II. It is worth your time and effort to study this subject.