Loads
RBE2 & RBE3 discrete ties can be used by modifying already generated remote loads.
To change a remote load to a load distributed by a RBE2 or RBE3 element the following commands can be added to the Advanced User Settings:
boundaryCondition.ModelLoadEvent_Force_1_Force.tyingMode=RBE2 boundaryCondition.ModelLoadEvent_Force_2_Force.tyingMode=RBE3 |
Force_1 & Force_2 have to be replaced with the names of the change desired loads.
Displacement Constraints / Rotational degrees of freedom
Displacement constraints can also be created with RBE2 elements. Thus, rotational degrees of freedom can be unconstrained.
Therefore, a dummy remote load has to be created with a load value. The dummy load can then be modified to a displacement constraint with a RBE2 element with the following 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 |
Force_1 has to be replaced with the name of the change desired load to a displacement constraint.
Limitations:
Displacement constraints can only be applied with RBE2 elements and not with RBE3 elements. Displacement constraints on RBE3 elements make the FE matrix unsolvable.
Several RBE2 elements on the same application region make the FE matrix unsolvable.
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