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Fixtures when applying centrifugal loads to non-linear analysis

Question asked by Mark Wylie on Oct 30, 2015
Latest reply on Nov 2, 2015 by Mark Wylie

Hi guys,

 

I have a box structure which requires quasi-static angular acceleration loads applied in all three orthogonal axes (separately). It is a bolted structure, so its a non-linear dynamic analysis.

 

I can apply the centrifugal load along each axis and through CoG but the model will not solve without fixtures.If I fix nodes then the centrifugal force is not applied? True?

 

I have tried advanced fixtures and restrained nodes on two surfaces, in this case, out of plane to the rotational axis. But this also returned an error for inadequate fixtures etc,

 

I have seen examples of this analysis on flywheels and other circular structures. They tend to fix the inner cylindrical face of the flywheel...but I cannot do this

 

I have attached an image of the set up.

 

Any suggestions?

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