I've got WI manifold model to be analyzed and i want to know loads and moments on the bottom flange of each valve shown in attachment. This is because of i want to compare actual nozzle loads with the allowable loads. I located anchors onto necessary points(above the bottom flanges) in order to determine this but it changed restraint loading of manifold supports( nodes 20, 60, 90) which i think should not be like this.
My query is: is there any other way you might recommend to use or more practical solution you have been using ?

Ramil,
You must have used anchor instead of C-node anchor. Alternatively check loads at interested node in “Global Element Force “report.

I'm in agreement with Khalidmf, except I would like to add that you need to consider at which point you need to measure your loads.

I typically put an Anchor+CNODE at the flange/flange connection, as well as at the nozzle wall, just in case I am ever queried, the information is available.

E.G. if your pipe is valve + flange + nozzle neck + header

Normal:
10-20 valve
20-30 flange
30-120 nozzle neck to center of header

110-120-130 header

Instead model:
10-20 valve,Anchor at 20, CNODE to 21
21-30 flange
30-40 nozzle neck to pipe OD, Anchor at 40, CNODE to 41
41-120 nozzle neck from pipe OD to center of header, branch connection at 120.

110-120-130 per normal

This will report simple loads at the header wall and flange/flange interface.

An even more adanced model would be as follows:
10-20 anchor at 20, cnode to 21
21-30
30-40 Y with K value, X with K value, Z with K value, all three at node 40, CNODE to 41
41-120 RX with K value, RZ with K value, both at node 41 CNODE to 40, SIFs input at 120.

The K values and SIF values can come from nozzlepro, fe/pipe, etc, or calculated through FEA tools. This will result in more flexibility and lower stresses and forces, typically.

Hi ramil,

Please note that Manifold should have one limit stop.

Hi Kumar,
Yes i'm aware of that possibility. Therefore, i've put rotational restraint(RZ) along the longitudinal axis of manifold to take care of rotational movement