Periodic Meshing

The Periodic Mesh utility can be used to generate a grid containing rotational and/or translational symmetric boundaries, for example rotating machinery. In the first step, the mesh on the source geometry has to be generated using any of HyperMesh surface meshing algorithms, for example 2D mesh with BL. In the second step of the Periodic Mesh utility, the mesh is mapped from the source geometry onto the target geometry. In addition to source and target geometry, detailed information about the transformation can be optionally entered.

The Periodic Mesh dialog contains the following buttons:

Button	Action
Check/Modify Geometry	Performs a check to determine whether source and target geometry are rotational and/or translational symmetric or not.
Check Mesh	Performs a check for source and target mesh to determine if symmetry exists.
Map Mesh	Maps the mesh from the source geometry onto the target geometry.
Reject	Rejects the generated mesh.
Close	Closes the dialog.

periodic_mesh_dialog2

To describe the mesh transformation between source and target geometry, expand the Symmetry options portion of the dialog to enter detailed information.

The following options are available in the Symmetry options section:

Option	Description
Translation	Defines the translation vector by two nodes.
Rotation	Defines the rotation by an arc (defined by three nodes) or by an axis and a rotation angle.

Both options can be used simultaneously for one transformation.

periodic_mesh_symmetry

After a successful mapping step, information about the transformation is plotted in the log region of the dialog.

periodic_mesh_log_step