bdf_equivalence
Module¶
- defines:
- model = bdf_equivalence_nodes(bdf_filename, bdf_filename_out, tol,
renumber_nodes=False, neq_max=4, xref=True, node_set=None, size=8, is_double=False, remove_collapsed_elements=False, avoid_collapsed_elements=False, crash_on_collapse=False, log=None, debug=True)
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_check_for_referenced_nodes
(model: pyNastran.bdf.bdf.BDF, node_set: Optional[Any], nids: Any, all_nids: Any, nodes_xyz: Any) → Optional[Any][source]¶ helper function for
_eq_nodes_setup
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_eq_nodes_build_tree_new
(kdt: KDTree, nodes_xyz: NDArrayN3float, nids: NDArrayNint, nnodes: int, is_not_node_set: bool, tol: float, log: SimpleLogger, inew=None, node_set=None, neq_max: int = 4, msg: str = '', debug: float = False) → Tuple[Any, List[Tuple[int, int]]][source]¶
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_eq_nodes_final
(nid_pairs, model: pyNastran.bdf.bdf.BDF, tol: float, node_set=None, debug: bool = False) → None[source]¶ apply nodal equivalencing to model
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_eq_nodes_setup_node
(model: pyNastran.bdf.bdf.BDF, renumber_nodes: bool = False) → Tuple[Any, Any, Dict[int, int]][source]¶ helper function for
_eq_nodes_setup
that doesn’t handle node sets
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_eq_nodes_setup_node_set
(model: pyNastran.bdf.bdf.BDF, node_set: List[Any], renumber_nodes: bool = False) → Tuple[Any, Any, Dict[int, int]][source]¶ helper function for
_eq_nodes_setup
that handles node_sets
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_get_tree
(nodes_xyz: Any, msg: str = '') → scipy.spatial.ckdtree.cKDTree[source]¶ gets the kdtree
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_get_xyz_cid0
(model: pyNastran.bdf.bdf.BDF, nids: Any, fdtype: str = 'float32') → Any[source]¶ gets xyz_cid0
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_nodes_xyz_nids_to_nid_pairs
(nodes_xyz: NDArrayN3float, nids: NDArrayNint, tol: float, log: SimpleLogger, inew: NDArrayNint, node_set=None, neq_max: int = 4, method: str = 'new', debug: bool = False) → List[Tuple[int, int]][source]¶ Helper for equivalencing
- Returns
- nid_pairsList[Tuple[int, int]]
a series of (nid1, nid2) pairs
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
_nodes_xyz_nids_to_nid_pairs_new
(kdt, nids, node_set, tol: float)[source]¶ helper function for bdf_equivalence_nodes
-
pyNastran.bdf.mesh_utils.bdf_equivalence.
bdf_equivalence_nodes
(bdf_filename: str, bdf_filename_out: Optional[str], tol: float, renumber_nodes: bool = False, neq_max: int = 4, xref: bool = True, node_set: Optional[Union[List[int], NDArrayNint]] = None, size: int = 8, is_double: bool = False, remove_collapsed_elements: bool = False, avoid_collapsed_elements: bool = False, crash_on_collapse: bool = False, log: Optional[SimpleLogger] = None, debug: bool = True, method: str = 'new') → BDF[source]¶ Equivalences nodes; keeps the lower node id; creates two nodes with the same
- Parameters
- bdf_filenamestr / BDF
str : bdf file path BDF : a BDF model that is fully valid (see xref)
- bdf_filename_outstr
str: a bdf_filename to write None: don’t write the deck
- tolfloat
the spherical tolerance
- renumber_nodesbool
should the nodes be renumbered (default=False)
- neq_maxint
the number of “close” points (default=4)
- xrefbool
does the model need to be cross_referenced (default=True; only applies to model option)
- node_setList[int] / (n, ) ndarray; default=None
the list/array of nodes to consider (not supported with renumber_nodes=True)
- sizeint; {8, 16}; default=8
the bdf write precision
- is_doublebool; default=False
the field precision to write
- remove_collapsed_elementsbool; default=False (unsupported)
- True1D/2D/3D elements will not be collapsed;
CELASx/CDAMP/MPC/etc. are not considered
False : no elements will be removed
- avoid_collapsed_elementsbool; default=False (unsupported)
- Trueonly collapses that don’t break 1D/2D/3D elements will be considered;
CELASx/CDAMP/MPC/etc. are considered
False : element can be collapsed
- crash_on_collapsebool; default=False
- stop if nodes have been collapsed
False: blindly move on True: rereads the BDF which catches doubled nodes (temporary);
in the future collapse=True won’t need to double read; an alternative is to do Patran’s method of avoiding collapse)
- debugbool
bdf debugging
- method: str; default=’new’
‘new’: doesn’t require neq_max; new in v1.3 ‘old’: use neq_max; used in v1.2
- loglogger(); default=None
bdf logging
- Returns
- modelBDF()
The BDF model corresponding to bdf_filename_out
Warning
I doubt SPOINTs/EPOINTs work correctly ..
Warning
xref not fully implemented (assumes cid=0) ..
Todo
node_set still does work on the all the nodes in the big kdtree loop, which is very inefficient
Todo
remove_collapsed_elements is not supported ..
Todo
avoid_collapsed_elements is not supported ..