What are the procedures to have alignment check using CAESAR II?

I am describing procedure which we follow in our company.

1. We defined the springs.

2. Then for Load case WNC, we defined, Hanger "As Designed".

3. Then we blank displacements of Turbine nozzle(Disconnect nozzle from Turbine).

4. Then we check displacements at Turbine nozzle. We maintain displacements lesser than 5 mm.

Is this right procedure?

Is their any practical approaches for alignment cases?

Is their any alternative method for this?

What do you think ??

Since your company has a procedure, you should follow it unless YOU disagree with it, then take up the matter with your lead engineer. But don't tell him you disagree with his procedure because the CAESAR II forum guys say so, unless you like getting fired.

That said, what you propose seems to be the minimum. You should consider Vendor allowable limits and in addition, limitation of rotation at the nozzle (more difficult to correct on site).

4). 5 mm displacement may not be acceptable to most vendors.

keep it up to 1 mm.

This condition is when spring is unlocked condition.


make one more check, with spring is locked by making hanger "rigid".