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Fixed Surface Rotation in a Model

Fixed Surface Rotation in a Model

Fixed Surface Rotation in a Model

(OP)
I need to fix a couple faces in my model to keep them from rotating in certain degrees of freedom.  However, when I go attempt to use the fixed surface option (highlight Environment, click Structural) it is grayed out.  Is this an assembly only feature?  How can I use this feature?  I think I am doing a 3D Simulation as I imported my model from Solidworks and am applying loads/constraints to that.  Any help is greatly appreciated.

RE: Fixed Surface Rotation in a Model

(OP)
Anyone?  I really need some help.

Thanks.

RE: Fixed Surface Rotation in a Model

Is your model meshed?

RE: Fixed Surface Rotation in a Model

(OP)
Yes it is constrained.  I have done some sizing controls and things of that sort.  I have tried this constraint with two different types of analysis.  One using a singe model for geometry with no contact and one using several models (assembly) with contact points.  I use Solidworks as my 3D CAD program.  Neither of these attempts yielded being able to use the fixed surface rotation option.

RE: Fixed Surface Rotation in a Model

Is rotation a valid DOF for the elements you're trying to constrain?  Solid elements can only be constrained in translational DOF.

RE: Fixed Surface Rotation in a Model

(OP)
I am designing hubs that are constrained by a double raced tapered roller bearing.  Therefore I need to constrain rotation about that bearing face on the hub.  What degrees of freedom does a fixed support constrain (3 translational and 3 rotational if I am correct)?  I am importing geometry from Solidworks, a 3D modelling system.  Are these models considered a solid element?

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