User defined constraint

The User Defined Constraint command lets you define constraints for up to six degrees of freedom (DOF). The DOF correspond to the nodal displacement coordinate system.

For example, if a node belongs to a solid element, it has three translational DOF. These DOF correspond to X,Y,Z directions if the Cartesian coordinate system is used.

Each DOF can be set to fixed, free, or a displacement value.

Note:

If nodal displacement coordinate systems already exist, the constraint's local 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.

When Abaqus is the selected solver, you can define a zero-valued boundary constraint when you create a user-defined constraint. For more information, see Zero-valued boundary constraint (Abaqus).

For information about user-defined constraints in the Simcenter Samcef environment, see User defined constraint (Simcenter Samcef).

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed partSimcenter Nastran, MSC Nastran, Abaqus, or ANSYS as the specified solver
Command Finder	User Defined Constraint
Simulation Navigator	Right-click Constraint Container→New Constraint→User Defined Constraint

Quick links

Command reference

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User defined constraint, Simcenter 3D 2021.1 Series

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