Velocity constraint (Nastran)

A velocity constraint applies a known velocity to geometry or FE entities, depending on the constraint creation method.

Constraint creation method	Supported geometry or FE entities
Magnitude and Direction****Component	curvepointmesh pointpolygon facepolygon edgenode
Normal	curvepointmesh pointpolygon facepolygon edgeelement

Note:

When you define a velocity constraint on geometry, a local coordinate system is created and applied to the underlying nodes. If local coordinate systems already exist at these nodes, the constraint's coordinate system may overwrite them. For example, if you define a constraint on a location where spring elements are defined, the constraint's coordinate system may overwrite the spring element definitions.

Velocity constraints are available only for the following Nastran solutions:

• SOL 108 Direct Frequency Response

• SOL 109 Direct Transient Response

• SOL 111 Modal Frequency Response

• SOL 112 Modal Transient Response

For more information, see Dynamic analysis

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed partNastran as the specified solver and a supported solution active
Command Finder	Velocity
Simulation Navigator	Right-click Constraint Container→New Constraint→Velocity

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Velocity constraint (Nastran), Simcenter 3D 2021.1 Series

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