Pressure Vessel Nozzle FEA - Constraint Help

[subaruwrc]

I am looking at analysing a nozzle on a pressure vessel in solidworks simulaltion (Cosmos). My attempts so far have resulted in unrealstic stresses / failed runs - my guess is this is down to being over constrained?? Can anyone provide some guidance as to how the model should be constrained.

Model is attached (SW 2009 version)...........

 

[kellnerp]

Post a neutral file like STEP, IGES or parasolid and I will have a look.

TOP
CSWP, BSSE

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Phenom IIx6 1100T = 8GB = FX1400 = XP64SP2 = SW2009SP3
"Node news is good news."

 

[rumandcola]

You don't have any restraint set in the y direction. Your model is also missing a pressure balancing force at the flange.