Dear all,

Per the User Guide pg 185:


When attempting to use this feature, however, I'm finding that a CNODE anchor won't fulfill this requirement, only an actual anchor or specified displacement will.

This I find odd, as I can use the CNODE anchor option to pull out loads on the nozzle in the restraint summary and manually check them, but CAESAR cannot.

Is there a solution or trick to accomplishing this that doesn't assume you can quantify the flexibility/movement of the nozzle manually?

Thanks.

I do that all the time (unless I'm not understanding you correctly).

Say I have piping from node 10-20. The nozzle is at node 20. I'd specify an ANC at node 20, CNode 21. At node 21, I can specify a displacement or continue with equipment modeling, say element 21-40 and so on.
For nozzle check, I'd specify Node as 20. Is that how you're doing it?

Thanks for the response.

Say you have a pipe, 1010-1020, a flange, 1020-1030.
At 1030, there's an anchor point, CNODE to 1031.
A flange is 1031-1040, and a pipe, 1040-1050.

<1010 is the rest of the piping system.
>1050 is the equipment.

The "nozzle" is 1031 through 1050. I've tried enabling the nozzle check on element 1031, as well as I've tried enabling it on 1030. I've moved the anchor itself from one side to the other.

I did not, however, specify any displacements, as I want CAESAR to calculate them.

The end result is an error message stating that the specified node is not at the model boundary.

It shouldn't matter at which element you enable Nozzle Lmt Check. What matters is the Node number you specify under Equipment Checks. In your example, you should define 1030 as the Node number under Equipment Checks.

The nozzle limit check must reference a node that is listed (as an anchor?) in the program's restraint report.
In your model, the pipe flange is 1020-1030 and the pump flange is 1031-1040. You have 1030 connected to 1031 through your "relative" anchor. Since you want to see the pipe load on the pump, the anchor should be defined at Node 1030 with a CNode at 1031 - this will give the load of the pipe on the pump. The restraint report will show node 1030 so use node 1030 as your node in the Nozzle Limit Check. (as Faizal says).
It works in my test model. Review your data and try again.