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Reaction Forces vs Mass Properties

Question asked by 1-J0IC7K on Sep 2, 2009
Latest reply on Sep 2, 2009 by Joe Galliera

Why are the Reaction Forces different from the Mass Properties in the model?



I have simplified my issue with a very simple problem.


Part = a solid cylinder with A36 [default] defined [1731.767 lb]



Material - same as part material

Force = Gravity - 386.22 in/s^2 [default]

Restraint = Fixed on Bottom face of cylinder

Mesh - very refined.

Reaction forces in y - direction = [1732.4 lb]


I know that the weight is not much different in this problem - but it is a hugh problem in my simulation analysis - I can give more details on my bigger issue - but first I need to know why these weights are different.