free_edges Module

defines:

edges = free_edges(model, eids=None) edges = non_paired_edges(model, eids=None)

pyNastran.bdf.mesh_utils.free_edges._get_edge_to_eids_map(model, eids=None)

helper method

pyNastran.bdf.mesh_utils.free_edges.free_edges(model: BDF, eids: Optional[List[int]] = None, maps=None) → List[Tuple[int, int]]

Gets the free edges for shell elements. A free edge is an edge that is only connected to 1 shell element.

Parameters

modelBDF()

the BDF model

eidsList[int]; default=None

a subset of elements to consider

mapsList[…] (default=None -> calculate)

the output from _get_maps(eids, map_names=None,

consider_0d=False, consider_0d_rigid=False, consider_1d=False, consider_2d=True, consider_3d=False)

Returns

edges: List[Tuple[int,int]]

list of node ids of each edges

pyNastran.bdf.mesh_utils.free_edges.non_paired_edges(model: BDF, eids: List[int] = None, maps=None) → List[Tuple[int, int]]

Gets the edges not shared by exactly 2 elements. This is useful for identifying rib/spar intersections.

Parameters

modelBDF()

the BDF model

eidsList[int]; default=None

a subset of elements to consider

mapsList[…] (default=None -> calculate)

the output from _get_maps(eids, map_names=None,

consider_0d=False, consider_0d_rigid=False, consider_1d=False, consider_2d=True, consider_3d=False)

Returns

non_paired_edgesList[(int nid1, int nid2), …]

the non-paired edges