Use the Midmesh: Automatic tool to automatically generate a mesh at the
midplane location, directly from the input geometry (components, elements, solids or
surfaces), without first creating a midsurface. This saves significant time over the
traditional midsurface-based approach.
From the Mesh ribbon, click the Midmesh > Automatic tool.
Figure 1.
Optional: On the guide bar, click to define midmesh
options.
Select geometry.
Use the drop down menu on the guide bar selector to
choose components, elements, solids, or surfaces as the source geometry
type.
Edit the extraction size value in the microdialog.
Click Midmesh in either the microdialog or the guide bar.
The midmesh is extracted. HyperMesh organizes the midmesh elements in the Midmesh.#
component (named is based on the Destination component option), and the midmesh edges in
the ^MidmeshEdges.# component.
Options for Creating Midmesh
Access the following options by clicking on the
Midmesh: Automatic tool guide bar.
Edit criteria
Set the minimum size and target element size settings in the criteria
file to control the resulting midmesh via the Criteria File Editor.
Extraction size
The midmesh extraction element size. By default this is taken as the
target element size from the criteria file. This can be set smaller than
the target size, though that is not recommended unless there are
problems extracting at the target size.
Minimum size
Minimum element size allowed in the finalized mesh. This in combination
with the ‘suppress proximity edges factor’ and 'combine non-manifold
edges factor’ can ensure that the output mesh is ready for rebuild with
the same criteria.
Can only be modified in the Criteria File
Editor.
Mask input entities
Hide input midmeshed entities in the modeling window upon exiting the
context.
Destination component
Select which component newly created midmeshes are placed in.
Ignore flat edges
Do not imprint flat edges from the input geometry onto the
midmesh.
Figure 2. Option Off
Figure 3. Option On
Flatten connections
Aligns/flattens the midmesh at ribs/connections.
Figure 4. Option Off
Figure 5. Option On
Step offset mode
This option allows finer control of how stepped geometry (one side
continuous surface, and opposite side steps) is captured. This option is
valid only when flatten connections is enabled. Values can be:
Automatic – Steps of different thickness across a
common base surface are automatically offset to a uniform distance from
the base surface.
Middle everywhere – Each step will be placed in
the middle everywhere.
Middle of thickest plate – All steps that share a
common base are moved to the middle of the thickest step. This might
place portions of the midmesh outside the solid.
Middle of thinnest plate – All steps that share a
common base are moved to the middle of the thinnest step.Figure 6.
Suppress proximity edges factor
The minimum size factor for removing edges within proximity. Edges
closer than this factor times minimum size will be
suppressed.
Figure 7. Option Off
Figure 8. Option On
Combine non-manifold edges factor
The minimum size factor for joining non-manifold edges. Non-manifold
edges closer than this factor times minimum size will be
combined.
Figure 9. Option Off
Figure 10. Option On
Defeature ribs width factor
The minimum size factor for removing small ribs. Ribs closer than this
factor times minimum size will be suppressed. Default is 0.9.
Defeature openings with width <
The maximum width for removal of small holes and openings.
to define midmesh
options.
on the
Midmesh: Automatic tool guide bar.
