nastran manual
This section describes all options that the user can find in the menu Constraints
Allows assign prescribed displacements and rotations around global axes.
These conditions can be assigned over points, lines and surfaces, and affect nodes.
X-Constraint->Prescribed displacement along X-global axis
X-Rotation->Prescribed rotation around X-global axis
The prescribed displacements and rotations always make references to global axes.
Assigns enforced displacements or rotations. The signs convention for components of a vector follows the right hand rule (see figure below).
This condition can be assigned over points, lines and surfaces, and it is attached to nodes of the entity.
Figure 1 – Positive Signs Convention |
Enforced displacements and rotations always make references to global axes.