October 17, 2021 at 3:12 pm

peteroznewman

Subscriber

**Deformable**Remote Force (RBE3 element in a linear analysis) distributes the force

**without adding stiffness to the structure**. If you perform the same calculation to determine how the RBE3 will distribute the force to each node and apply the nodal forces yourself, you will get a very similar result.

Forces applied to nodes

**do**have a say in the displacements in the model: F = K.X, double the force, double the displacement. Forces don't have a say in the stiffness of the structure, K = F/X which is the same as 2F/2X.

**Rigid**Remote Force (CERIG element in a linear analysis) rewrites the stiffness matrix, giving you a

**stiffer structure**than what you had before you added the Rigid Remote Force. When using this, think about adding very stiff elements between the scoped faces/edges.

Forces

**do not**become part of the global stiffness matrix [K], they are in the system of equations that are solved [K]{X} = {F}.