Modelling Stress Analysis Interface Locations

[PipelineDeptTME]

I have a piping system which is about 20 m long with 4 supports (either rest type or rest+guide type; no axial stops) and the system is terminating with a flange (2 meters after the last support). Infact, this flange is an interface between my project and future project. We do not have any clue about the future routing. Hence, the standard practice is to model the stress analysis system till the interface flange. Keep CNODE anchor at that point and extract displacements at interface flange. These displacements will be an input to the future project to consider in their analysis.
However, my client came up with a comment to include Rz and Rx at interface flange along with C node. Can somebody advise the advantage of modelling the rotations at cnode?

 

[johnengkol]

regarding to your explanation about your model, I think there is no tendency of pipe will be move with rotation, you may ask your client why should you put rotational displacement at your flange/nozzle. as you said "Keep CNODE anchor at that point and extract displacements at interface flange", you already put exact displacement at that flange

Furthermore, client want to put rotational force on your CNODE, maybe they gonna place some rotational or vibration equipment in the future. For example when you modelling API 6.10 for centrifugal Pump, we put all Degree of freedom into force as API 6.10 mentioned.

Hope this could help you.