Rectangular transition duct/pipe

[Mrbobbyjoe]

Hello everyone!
I have an interesting problem I am facing with modeling. I am running a 32" pipe into a blower wich then transitions to a rectangular duct. Its not a long piece of ducting, however it does contain a spring hanger and a +y restraint a few feet after, before returning to circular pipe. Is it possible to model this and with good /acceptable accuracy? Thanks,
Rich

 

[richay]

The best way to do this is to use the "Structural Modeler" and create a "User Defined Shape/Cross-Section". Then include this in your piping model.

You can't approximate a rectangular cross-section in with a pipe (circular cross-section). You need to model (accurately) both the area and the inertia. You can only get one of these right with a circular cross-section, not both.

Richard Ay
COADE, Inc.