*morphconstraintupdatedof
Updates a constraint which fixes the x (or radial), y (or theta), and/or z degrees of freedom for the selected nodes for a given system.
Syntax
*morphconstraintupdatedof entity_type mark_id dof1 dof2 dof3 system_id options id color
Type
HyperMesh Tcl Modify Command
Description
This command creates a constraint which fixes one or more translational degrees of freedom for the selected nodes relative to either the global coordinate system or a specified local coordinate system.
A degree of freedom for a coordinate system is one of the three translational directions. For a rectangular coordinate system the three degrees of freedom are along each axis: the x-axis, the y-axis, and the z-axis. For a cylindrical coordinate system the three degrees of freedom are in the the radial direction, the theta direction, and the z direction. For example, for a rectangular coordinate system, if the y-axis degree of freedom is fixed for a node, it will be allowed to move only in the x and z directions, remaining in a plane perpendicular to the y axis. Similarly, for a cylindrical coordinate system, if the theta degree of freedom is fixed for a node, it can move only in the radial and z directions. Note that fixing the radial and z degrees of freedom for a cylindrical coordinate system will force a node to move in a circle about the axis of that system.
Inputs
- entity_type
- Must be set to nodes.
- mark_id
- The mark ID for the constrained nodes. Valid values are 1 and 2.
- dof1
- 0 - Allow the nodes to move in the x (or radial) direction
- dof2
- 0 - Allow the nodes to move in the y (or theta) direction
- dof3
- 0 - Allow the nodes to move in the z direction
- system_id
- The ID of the local coordinate system. Use 0 for the global coordinate system.
- options
- 0 - Does not affect nodes near constrained nodes
- id
- The ID of morph constraint to update.
- color
- The color of the constraint. Valid values are 1-64.
Example
To update a DOF constraint with ID 12 for nodes 1-100 in the radial direction of a local coordinate system with ID 5 and mesh stretching enabled:
*createmark nodes 1 1-100
*morphconstraintcreatedof nodes 1 1 0 0 5 1 12 22
Errors
if { [ catch {command_name...} ] } {
# Handle error
}
Version History
14.0.110