Rigid Elements
Rigid Elements
(OP)
What is the difference between RBE2 and RBE3 Elements (Kimenatic coupling and distributing coupling elements)?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Rigid Elements
Hope is useful somehow
RE: Rigid Elements
I don't know how NASTRAN implements the constraints but in ABAQUS the motion of coupling nodes (in an element or node-based surface) is governed by the reference node in both kinematic and distributing coupling constraint. Element-based surfaces are usually the way to go, particularly in distributing coupling constraints.
Think of kinematic coupling as a "hard" constraint of rigid body motion on the coupling nodes. However, distributing coupling allows transmission of loads since the constraint is enforced only in an average sense ("soft" constraint). Depending on the coupling method employed, distributing coupling constraint has two sub-types: continuum and structural. No moments are transferred in continuum coupling, whereas in structural coupling both forces and moments are transferred (similar to what DCOUP2D and DCOUP3D elements allow).
P.S.: I know nothing of NASTRAN.
RE: Rigid Elements
However, distributing coupling [constraint] also allows transmission of loads since the constraint is enforced only in an average sense ("soft" constraint).