Add "on cylindrical face" constraint (similar to Pin constraint in Fusion 360)

[Anonymous]

Please add "on cylindrical face" constraint (similar to Pin constraint in Fusion 360):

When selecting a cylindrical face, this constraint would allow you to prevent face from moving in radial, tangential, circunferential direction.

It's currently very tedious to do it in Nastran in-CAD because you need to define a local coordinate system, and when you have many holes to constrain it's time consuming.

[Anonymous]

Ability to define this constraint without having to define a local cordinate system would solve another problem.

See this model:

- Bottom face has a Frictionless constraint, and it doesn't allow the face to move vertically in the global cordinate system

- Left hole has a constraint defined in a cylindrical cordinate system to prevent only radial displacement

- Right hole has a constraint defined in another cylindrical cordinate system to prevent only radial displacement

If you run analysis Nastran in CAD will pop up and error informing that it's not allowed to constrain a node in two different cordinate systems.

This is because the bottom edges of the holes (which sits on the flat constrained face) has nodes that are constrained in both global cordinate system and the two local cordinate systems.

If you don't have to define a cordinate system in your constraint this problem would not exist,

Infact in Fusion 360 this problem doesn't occur because you don't define any cordinate system.