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Displacement constraints can also be created with RBE2 Elementselements. Thus, rotational degrees of freedom can be unconstrained.
Therefore, a dummy remote load has to be created with a load value in one direction which will be constrained. The dummy load can then be modified to a displacement constraint with a RBE2 element . E.g. with the following Advanced User Setting commands the rotation around the x-axis is freed:commands. Unconstraint directions or rotations are left free to enable rotation. Ideally, the dummy load is applied in a direction of a translational displacement constraint so that the dummy load is without influence.
boundaryCondition.ModelLoadEvent_Force_1_Force.tyingMode=RBE2 |
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Force_1 hasto be replaced with the name of the change desired load to a displacement constraint. |
Displacement constraints can only be applied with RBE2 elements and not with RBE3 elements. Displacement constraints on RBE3 elements make the FE matrix unsolvable.
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