refine Module

pyNastran.bdf.mesh_utils.refine.hexa_get_sorted_faces(elem: CHEXA8)[source]
pyNastran.bdf.mesh_utils.refine.penta_get_sorted_faces(elem: CPENTA6)[source]
pyNastran.bdf.mesh_utils.refine.refine_model(bdf_filename: BDF | str | StringIO | PurePath, refinement_ratio: int = 2, skip_solids: bool = False) → BDF[source]

xref should be turned off TODO: support refinement_ratio != 2

Handles:

  • nodal continuity across elements

  • CBAR, CTRIA3, CQUAD4, CHEXA8…

  • handles overlapping CQUAD4s (that share the same nodes)

  • handles rotated/flipped interface between elememts (e.g., CQUAD4/CQUAD4 or CQUAD4/CHEXA8)

Todo

support refinement_ratio != 2…minor

Todo

doesn’t support CPENTA6…high priority, not bad

Todo

doesn’t support CPENTA6/CQUAD4 interface…high priority, not bad

Todo

doesn’t support CPENTA6/CTRIA3 interface…high priority, not bad

Todo

doesn’t support CTETRA4…low priority, not bad

Todo

doesn’t support CTETRA4/CTRIA3 interface…low priority, not bad

Warning

doesn’t handle overlapping solid elements…low priority, pain

Warning

doesn’t handle CBAR wa/wb

Warning

probably doesn’t handle CBAR orientation vector correctly

Note

doesn’t refine SPCs / RBEs