Measure displacement with an external point

Chris84

I'd like to create a displacement response (also an optimisation constraint), which is measured at a point outside of my geometry. I tried to fix him to my geometry with an RBE2 element, but that made the RBE2 stretch and the point stayed where it was. I'd like the point to move by the same amount a / some nodes of my component move after applying a force. How can I achieve that?

Adriano_Koga

are you sure the RBE2 is using all DOFs? 

 

You can try to use a RBE3 for this, as the central node will give you an 'averaged' displacement.