RBE2 and RBE3 are basically rigid elements that are use to connect mesh sets together.
The name is similar, but there is a fundamental difference between them:
RBE2 transmits the displacements and RBE3 transmits the Loads (MPC Forces)
I made 2 videos that show:
- How to create RBE2 and RBE3 Elements
- The results in terms of displacements and forces
The material I used to create this example is here