How to constraint 6DOF for a surface in a Flexible body (MNF)?

I have generated an MNF file in Abaqus and a node of a surface is fixed and the node is MPC beam constraint to the target surface. My FEA results are correct and the surface tied to the node is fixed as expected.

Now the MNF file with these BCs is generated and imported to Adams. Now I want to compare deformation from Adams and Abaqus. They are totally different even though the surface was fixed in ABAQUS and had zero displacements, it has displacement in ADAMS. Please look at the following image for more information and please help me out with what causes this issue.

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0 Fredrik Sjogren over 2 years ago

Hi Abbas,

Nothing wrong with that. Remember that a flexible body (based on an mnf) is a linear representation of the body elasticity. When scaling the deformation you scale the modal coordinates of the flexbody. The more you scale it the more funny it may look because you scale a linear deformation base.
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0 Fredrik Sjogren over 2 years ago

Hi Abbas,

Nothing wrong with that. Remember that a flexible body (based on an mnf) is a linear representation of the body elasticity. When scaling the deformation you scale the modal coordinates of the flexbody. The more you scale it the more funny it may look because you scale a linear deformation base.
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