Using a Reference Axis
You can use an axis as a reference to apply restraints. You can prescribe the translations in the radial, circumferential, and axial directions. For shells and beams, you can prescribe rotations in reference to these directions.
The angle (q) specified for the circumferential translation is used to calculate the actual translation (v) at each node from the formula: v = r. q where r is the distance from the node to the reference axis.
The following table summarizes the attributes of this restraint type:
Attribute
|
Value
|
Possible DOFs for solids
|
3 translations
|
Possible DOFs for shells and beams
|
3 translations and 3 rotations
|
Possible DOFs for trusses
|
3 translations
|
|
3D symbol
|

translation
|

rotation
|
Selectable entities
|
Vertices, edges, faces and beam joints
|
Translations
|
Radial displacement
|
Circumferential displacement
|
Axial displacement
|
Rotations (for shells and beams only)
|
About radial direction
|
About circumferential direction
|
About axial direction
|