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)[source]

helper method

pyNastran.bdf.mesh_utils.free_edges.free_edges(model, eids=None, maps=None)[source]

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

Parameters:
model : BDF()

the BDF model

eids : List[int]; default=None

a subset of elements to consider

maps : List[…] (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)

pyNastran.bdf.mesh_utils.free_edges.non_paired_edges(model, eids=None, maps=None)[source]

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

Parameters:
model : BDF()

the BDF model

eids : List[int]; default=None

a subset of elements to consider

maps : List[…] (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_edges : List[(int nid1, int nid2), …]

the non-paired edges