I have a project with several large (30-48") frp ducts running between FRP Flash Tanks and 316 SS condensers. THE FRP supplier waited over a year before informing us that the nozzle loads where too high. So we need to use bellows type expansion joints at the nozzles.
I'm using CII Ver 5.30.03 Build 120131. I read up on using the expansion joints and stuck in the axial, transverse, Torsional, and Effective ID values. However, if I look at the differential movement occuring across the joint, the restraint forces reported are 3 to 4 times higher then what (I think) they should be (mainly delta * stiffness).
BTW, the tanks and nozzles are modeled. I'm wondering if I can model the exp. joint using a cnode with restaints and displacements.
Am I missing something?
Edited by egcallis (02/12/13 10:37 AM)