AnsweredAssumed Answered

Gravity gone wild?

Question asked by Chris Michalski on May 7, 2013
Latest reply on May 9, 2013 by Chris Michalski

Okay I'm in 2009 SP4.1 so this might be a glitch that no longer exists.  I was having problems getting 1 component of an assembly to mesh so I decided to investigate it separately to find usable mesh settings.  Found those, but when I did a simple simulation to verify it was sufficient I get some screwy results.


It's a welded shaft with differing cross-sections.  I started with 2 bearing supports then switched to 2 circular fixtures, both give weird results.  It is fine using a centrifugal load only, but applying gravity or a pressure/force on the OD face towards a reference plane is being misinterpretted somewhere. 


Hints?  Am I missing something here or is this simply a glitch in the Matrix?  I tried gravity and centrifugal on a plain tube and things were fine.

20130507 grav1a.jpg

setup of tube with gravity and 2 cylindrical fixtures


20130507 grav3a.jpg

with centrifugal forces the results are reasonable, very small radial expansion


20130507 grav2a.jpg

But when I apply gravity it acts like it is a HUGE centrifugal load.  It should be bending downward, in the middle, not expanding radially.