You can use a plane as a reference to apply restraints. You can prescribe the translations in directions 1 and 2 of the plane as well as in the direction normal to the plane. For shell meshes, you can prescribe rotations in reference to these directions.
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
|
 Along plane direction 1
 Along plane direction 2
 Normal to plane
|
| Rotations (for shells and beams only)
|
About plane direction 1
About plane direction 2
About normal to plane
|
Example
Using the reference plane (shown in blue) of the fork, you can restrain the selected faces (shown in dark green) along Dir 1 and the normal direction (shown in light green). This leaves the selected faces free to move along Dir 2 (shown in red).