Guru's,
I have been getting some odd results on an analysis that I've been
running with symmetry and a pressure load. As a check, I set up a
simple analysis of a cylinder with a hole drilled in it. The bottom of
the cylinder is fixed and the hole has an applied pressure load to it's
surfaces. I created measures in x,y and z on the constraint to measure
reaction loads. I anticipated seeing ZERO z and x reaction forces as
the internal pressure should be completely balanced. The model looks
like this:
I was shocked to see the following reaction load measures: x = 0,
y=189,673 and z= -15,896 ! Is this the way it's supposed to work? My
understanding was the creating a symmetry plane would essentially create
a mirror image of everything; part, loads, constraints.... As a check
to this, I ran without symmetry. The model looks like this:
Results for the reaction load measures were: x=0, y=379,347 and z=0
which is just what I expected from both analysis.
So is it correct that I am wrong, and that creating a symmetry plane
ONLY creates a mirror of the model and constraints but NOT the loads?
Also, if I was applying a force to the top surface of my example above
and no pressure load, if I was running symmetry, I would apply HALF the
force, is that correct?
thanks in advance...
Paul Korenkiewicz
FEV , Inc.
4554 Glenmeade
Auburn Hills, MI, 48326-1766
