cart3d Package
cart3d
Module
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"pyNastran.converters.cart3d.cart3d_reader_writer.Cart3dReaderWriter" -> "pyNastran.converters.cart3d.cart3d.Cart3D" [arrowsize=0.5,style="setlinewidth(0.5)"];
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- Defines:
- Cart3D(log=None, debug=False)
read_cart3d(self, infilename, result_names=None)
write_cart3d(self, outfilename, is_binary=False, float_fmt=’%6.7f’)
flip_model()
make_mirror_model(self, nodes, elements, regions, loads, axis=’y’, tol=0.000001)
make_half_model(self, axis=’y’, remap_nodes=True)
get_free_edges(self, elements)
get_area(self)
get_normals(self)
get_normals_at_nodes(self, cnormals)
- comp2tri(in_filenames, out_filename,
is_binary=False, float_fmt=’%6.7f’)
- class pyNastran.converters.cart3d.cart3d.Cart3D(log=None, debug=False)[source]
Bases:
Cart3dReaderWriter
Cart3d interface class
- get_area() ndarray [source]
Gets the element area
- Returns:
- area(nelement,) float ndarray
the element areas
- get_area_centroid_normals()[source]
Gets the area, centroid, and centroidal normals
- Returns:
- area(nelement,) float ndarray
the element areas
- centroid(nelement, 3) float ndarray
centroid of the element
- cnormals(nelement, 3) float ndarray
normalized centroidal normal vectors
- get_free_edges(elements)[source]
Cart3d must be a closed model with each edge shared by 2 elements The free edges indicate the problematic areas.
- Returns:
- free edges(nedges, 2) int ndarray
the free edge node ids
- get_normals() ndarray [source]
Gets the centroidal normals
- Returns:
- cnormals(n, 3) ndarray
normalized centroidal normal vectors
- get_normals_at_nodes(cnormals: ndarray) ndarray [source]
Gets the nodal normals
- Parameters:
- cnormals(nelement, 3) float ndarray
normalized centroidal normal vectors
- Returns:
- nnormals(nnode, 3) float ndarray
normalized nodal normal vectors
- is_outward_normals = True
- is_structured = False
- keep_elements(ielements: ndarray, remove_associated_nodes: bool = True) ndarray [source]
keeps a set of elements from the model
- make_half_model(axis: str = 'y', remap_nodes: bool = True)[source]
Makes a half model from a full model
Notes
Cp is really loads[‘Cp’] and was meant for loads analysis only
- make_mirror_model(nodes, elements, regions, loads, axis='y', tol=1e-06)[source]
Makes a full cart3d model about the given axis.
- Parameters:
- nodes(nnodes, 3) ndarray
the nodes
- elements(nelements, 3) ndarray
the elmements
- regions(nelements) ndarray
the regions
- loadsdict[str] = (nnodes) ndarray
not supported
- axisstr; {“x”, “y”, “z”, “-x”, “-y”, “-z”}
a string of the axis
- tolfloat; default=0.000001
the tolerance for the centerline points
- model_type = 'cart3d'
- pyNastran.converters.cart3d.cart3d.comp2tri(in_filenames, out_filename, is_binary=False, float_fmt='%6.7f', log=None, debug=False) Cart3D [source]
Combines multiple Cart3d files (binary or ascii) into a single file.
- Parameters:
- in_filenameslist[str]
list of filenames
- out_filenamestr
output filename
- is_binarybool; default=False
is the output file binary
- float_fmtstr; default=’%6.7f’
the format string to use for ascii writing
Notes
assumes loads is None
- pyNastran.converters.cart3d.cart3d.convert_to_float(svalues: list[str]) list[float] [source]
Takes a list of strings and converts them to floats.
- pyNastran.converters.cart3d.cart3d.get_area_centroid_normals(nodes: ndarray, elements: ndarray) tuple[ndarray, ndarray, ndarray] [source]
Gets the area, centroid, and centroidal normals
- Parameters:
- nodes(nnode,3) float ndarray
the nodal load
- elements(nelement,3) int ndarray
the nodal load
- Returns:
- area(nelement,) float ndarray
the element areas
- centroid(nelement, 3) float ndarray
centroid of the element
- cnormals(nelement, 3) float ndarray
normalized centroidal normal vectors
cart3d_result
Module
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"pyNastran.gui.gui_objects.gui_result.GuiResultCommon" -> "pyNastran.converters.cart3d.cart3d_result.Cart3dGeometry" [arrowsize=0.5,style="setlinewidth(0.5)"];
"pyNastran.gui.gui_objects.gui_result.GuiResultCommon" [fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled"];
}
- defines:
Cart3dGeometry
- class pyNastran.converters.cart3d.cart3d_result.Cart3dGeometry(subcase_id, labels, nodes, elements, regions, area, cnormals, colormap: str = 'jet', uname: str = 'Cart3dGeometry')[source]
Bases:
GuiResultCommon
Stores the cart3d results.
cart3d_to_nastran
Module
- pyNastran.converters.cart3d.cart3d_to_nastran.cart3d_to_nastran_filename(cart3d_filename, bdf_filename, log=None, debug=False)[source]
Converts a Cart3D file to Nastran format.
- Parameters:
- cart3d_filenamestr
path to the input Cart3D file
- bdf_filenamestr
path to the output BDF file
- loglog / None
log : a logger object None : a log will be defined
- debugbool
True/False (used if log is not defined)
Examples
>>> cart3d_filename = 'threePlugs.tri' >>> bdf_filename = 'threePlugs.bdf' >>> cart3d_to_nastran_filename(cart3d_filename, bdf_filename)
- pyNastran.converters.cart3d.cart3d_to_nastran.cart3d_to_nastran_model(cart3d_filename: str, loads_map: LOADS_DICT | None = None, log: SimpleLogger | None = None, debug: bool = False) BDF [source]
Converts a Cart3D file to Nastran format and returns a BDF() object.
- Parameters:
- cart3d_filenamestr
path to the input Cart3D file
- loads_dict: dict[load_id, case]
case : dict[eid, pressure] write the loads
- loglog / None
log : a logger object None : a log will be defined
- debugbool
True/False (used if log is not defined)
- Returns:
- bdf_modelBDF
BDF() model object
cart3d_to_stl
Module
- defines:
stl = cart3d_to_stl(cart3d, stl_filename=None, is_binary=False, log=None, debug=False)
stl = cart3d_to_stl_filename(cart3d_filename, stl_filename=None, is_binary=False, log=None, debug=False)
- pyNastran.converters.cart3d.cart3d_to_stl.cart3d_to_stl(cart3d, stl_filename=None, is_binary=False, log=None, debug=False)[source]
Converts a Cart3D object to STL format.
- Parameters:
- cart3dCart3D()
a Cart3D object
- stl_filenamestr; default=None
path to the output STL file (or None to skip)
- loglog
a logger object (or None)
- debugbool; default=False
True/False (used if log is not defined)
- Returns:
- stlSTL()
an STL object
Todo
this seems to be broken… ..
- pyNastran.converters.cart3d.cart3d_to_stl.cart3d_to_stl_filename(cart3d_filename, stl_filename=None, is_binary=False, log=None, debug=False)[source]
Converts a Cart3D file to STL format.
- Parameters:
- cart3d_filenamestr
path to the input Cart3D file
- stl_filenamestr; default=None
path to the output STL file (or None to skip
- is_binarybool; default=False
writes the stl in binary
- loglog
a logger object (or None)
- debugbool; default=False
True/False (used if log is not defined)
- Returns:
- stlSTL()
an STL object
cart3d_to_tecplot
Module
input_c3d_reader
Module
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- class pyNastran.converters.cart3d.input_c3d_reader.InputC3dReader(log=None, debug=False)[source]
Bases:
object
- pyNastran.converters.cart3d.input_c3d_reader.read_input_c3d(input_c3d_filename, log=None, debug=False, stack=True) InputC3dReader [source]
reads the input.c3d file
>>> input_c3d_filename = 'bJet/input.c3d' >>> nodes, elements = read_input_c3d(input_c3d_filename)
input_cntl_reader
Module
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- class pyNastran.converters.cart3d.input_cntl_reader.InputCntlReader(log=None, debug=False)[source]
Bases:
object
- pyNastran.converters.cart3d.input_cntl_reader.read_input_cntl(input_cntl_filename, log=None, debug=False) InputCntlReader [source]