Manually morphing a mesh

Use the Manual Morph command to manually morph existing nodes and elements to conform to modified geometry. With the Manual Morph command, you must manually define the associations between the existing nodes and the geometry.

Use the Manual Morph command when:

• You want to morph a mesh to conform to updated polygon geometry or to updated CAD geometry that has topology modifications.

• The Automatic Morph command is not able to automatically associate the existing nodes to the new geometry.

• Only selected elements need to be morphed to achieve a localized change.

• You want to update a specific region of an orphan mesh, which is a mesh with no existing geometry association.

• You want to associate an orphan mesh to new CAD geometry.

Mapping nodes to the geometry

In the Manual Morph dialog box, you must map the nodes in the mesh to the polygon geometry. The software uses these mappings to:

• Associate the nodes to the polygon geometry.

• Determine where to move the nodes during the morphing process.

You can use the Node Mapping Method options in the Manual Morph dialog box to specify how the existing nodes should be associated (mapped) to the updated geometry. For example, you can:

• Select Fixed to indicate that an existing node should not move during morphing.

• Select Node to Point to map an existing node to a point or vertex on the polygon geometry.

• Select Node to Edge to map an existing node to an edge on the polygon geometry.

• Select Node to Face to map an existing node to a face on the polygon geometry.

Using the Mapping List

The Mapping List in the Manual Morph dialog box displays all existing node-to-geometry mappings. You can use options in the Mapping List to:

• Modify an existing mapping.

• Delete a selected mapping.

• Change the order of the mappings in the list.

Best practices for creating mappings

• A Node to Face mapping associates nodes to the surface but does not define how the edge and vertex nodes in the mesh are related to the surface. Consequently, you should also create the appropriate Node to Edge mappings to ensure that the nodes on the perimeter of the surface and at the vertices are properly associated.

• In a Node to Edge mapping, the Uniformly Across Edge and Keep Source Bias distribution methods require that you designate the appropriate nodes as vertex nodes. Explicitly designating the vertex nodes provides the software with unambiguous information that generally results in the creation of better edge mappings.Tip: Regardless of the distribution method that you select for a Node to Edge mapping, you should always use the Vertex Nodes option to explicitly define the correspondence between nodes at the corners of your mesh and the vertices on the geometry.

Association of nodes and elements with the Manual Morph command

When you use the Manual Morph command, the software changes the association of only the external nodes. The association of the nodes in the interior of the mesh remains unchanged. Any nodes that you explicitly include in a map are associated to the appropriate geometry during the manual morph process. How the software associates any connected elements to the geometry depends on the element’s order. For more information, see Node and element association during morphing.

Handling of nodes in multiple maps

If a node is included in multiple map definitions, the software uses the following rules to determine which map will take precedence:

• If a node is included in a single Node to Point map, the software moves the node to the point’s location.

• If a node is included in multiple Node to Point maps, the software honors the map that comes first in the mapping list and moves the node to that location.

• If a node is included in a Node to Edge and a Node to Face map, the software uses the Node to Edge map.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the work part and displayed part
Command Finder	Manual Morph

Learn more

Morphing a mesh

Automatically morphing a mesh

Morphing a revolved mesh

Comparing the manual morphing node distribution methods

Node and element association during morphing

Manually associating nodes to geometry

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Manually morphing a mesh, Simcenter 3D 2021.1 Series

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