*morphnodesnormalenvelope
Moves the selected nodes normal to the attached elements while morphing the affected elements.
Syntax
*morphnodesnormalenvelope m_entity_type m_mark_id e_entity_type e_mark_id f_entity_type f_mark_id n_entity_type n_mark_id dist integ mbias fbias
Type
HyperMesh Tcl Modify Command
Description
This command will move the selected nodes the specified distance normal to the selected elements. The fixed nodes are held in place and the affected elements (or all unfixed nodes in the model if integ is 3 or 6) are stretched according to the value of integ.
Temporary handles are created for all moving and fixed nodes to determine the stretching of the affected elements. If integ is 0, a general domain is temporarily created for the affected elements. If integ is 1, the domains currently in the model are used. If integ is 2, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements but the 2D domains are not partitioned. If integ is 3 then handle influences are applied using a spatial relationship rather than through a domain. If integ is 4, only the selected moving nodes are moved and all others are held fixed. If integ is 5, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements and the 2D domains are partitioned. Any handles created due to partitioning are moved based on their distance from the moving and fixed nodes. If integ is 6, then handle influences are applied using the Kriging algorithm. If integ is 7, then handle influences extend only up to a given distance (if envelope is positive) or a given multiple of the applied perturbations (if envelope is negative) away from the moving nodes.
If 100 is added to the value of integ, the normals of the elements selected for determining the direction of morphing will be averaged with their neighbors, resulting in a smooth distribution of vectors around sharp corners.
If 200 is added to the value of integ, the normals of the elements selected for determining the direction of morphing will be calculated using the "CFD corners" method, resulting in a very smooth distribution of vectors around sharp corners which should prevent mesh folding.
The bias factors function as they would for handles except that all moving nodes will have the mbias value and all fixed nodes will have the fbias value.
If integ is set to 3, 6, or 7, nodes on undisplayed elements and components can be morphed, fixed, or excluded depending on the value of undisplayed.
Inputs
- m_entity_type
- Must be set to nodes.
- m_entity_mark
- The mark ID of the moving nodes. Valid values are 1 and 2.
- e_entity_type
- Must be set to elems.
- e_entity_mark
- The mark ID of the affected elements. Valid values are 1 and 2.
- f_entity_type
- Must be set to nodes.
- f_entity_mark
- The mark ID of the fixed nodes. Valid values are 1 and 2.
- n_entity_type
- Must be set to elems.
- n_mark_id
- The mark ID of the element used to determine the normal direction. Valid values are 1 and 2.
- dist
- The distance the nodes will be moved.
- integ
- 0 - Free edges (a single general domain)
- mbias
- Bias factor of moving nodes.
- fbias
- Bias factor of fixed nodes.
- envelope
- If positive, all nodes beyond the given distance away from the moving nodes will be fixed.
- undisplayed
- If integ is set to 3, 6, or 7, nodes which are not displayed can be affected by the morphing. This defines how undisplayed nodes are handled:
Example
To move a mark of nodes normal to their attached elements by 5 units and stretch all the elements in the model using the existing domains:
*createmark nodes 1 11 12 13
*createmark elems 1 "all"
*createmark nodes 2 21 22 23
*createmark elems 2 "all"
*createvector 1 1.0 0.0 0.0
*morphnodesnormalenvelope nodes 1 elems 1 nodes 2 elems 2 5.0 1 1.0 1.0 0.0 0
Errors
if { [ catch {command_name...} ] } {
# Handle error
}
Version History
12.0.110