beam
Module
digraph inheritance5f8fec6ebd {
bgcolor=transparent;
rankdir=LR;
size="";
"pyNastran.bdf.cards.base_card.BaseCard" [URL="../pyNastran.bdf.cards.base_card.html#pyNastran.bdf.cards.base_card.BaseCard",fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",target="_top",tooltip="Defines a series of base methods for every card class"];
"pyNastran.bdf.cards.base_card.Element" [URL="../pyNastran.bdf.cards.base_card.html#pyNastran.bdf.cards.base_card.Element",fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",target="_top",tooltip="defines the Element class"];
"pyNastran.bdf.cards.base_card.BaseCard" -> "pyNastran.bdf.cards.base_card.Element" [arrowsize=0.5,style="setlinewidth(0.5)"];
"pyNastran.bdf.cards.elements.bars.LineElement" [URL="pyNastran.bdf.cards.elements.bars.html#pyNastran.bdf.cards.elements.bars.LineElement",fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",target="_top"];
"pyNastran.bdf.cards.base_card.Element" -> "pyNastran.bdf.cards.elements.bars.LineElement" [arrowsize=0.5,style="setlinewidth(0.5)"];
"pyNastran.bdf.cards.elements.beam.BEAMOR" [URL="#pyNastran.bdf.cards.elements.beam.BEAMOR",fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",target="_top",tooltip="+--------+-----+---+---+---+-------+-----+-------+------+"];
"pyNastran.bdf.cards.base_card.BaseCard" -> "pyNastran.bdf.cards.elements.beam.BEAMOR" [arrowsize=0.5,style="setlinewidth(0.5)"];
"pyNastran.bdf.cards.elements.beam.CBEAM" [URL="#pyNastran.bdf.cards.elements.beam.CBEAM",fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",target="_top",tooltip="+-------+-----+-----+-----+-----+-----+-----+-----+----------+"];
"pyNastran.bdf.cards.elements.bars.LineElement" -> "pyNastran.bdf.cards.elements.beam.CBEAM" [arrowsize=0.5,style="setlinewidth(0.5)"];
}
- defines:
CBEAM
BEAMOR
- class pyNastran.bdf.cards.elements.beam.BEAMOR(pid, is_g0, g0, x, offt='GGG', comment='')[source]
Bases:
BaseCard
1
2
3
4
5
6
7
8
9
BEAMOR
PID
G0/X1
X2
X3
OFFT
BEAMOR
39
0.6
2.9
-5.87
GOG
- type = 'BEAMOR'
- class pyNastran.bdf.cards.elements.beam.CBEAM(eid, pid, nids, x: list[float] | None, g0: int | None, offt='GGG', bit=None, pa=0, pb=0, wa=None, wb=None, sa=0, sb=0, comment='')[source]
Bases:
LineElement
1
2
3
4
5
6
7
8
9
CBEAM
EID
PID
GA
GB
X1
X2
X3
OFFT/BIT
PA
PB
W1A
W2A
W3A
W1B
W2B
W3B
SA
SB
or
1
2
3
4
5
6
7
8
9
CBEAM
EID
PID
GA
GB
G0
OFFT/BIT
PA
PB
W1A
W2A
W3A
W1B
W2B
W3B
SA
SB
bit is an MSC specific field NX 2020 added offt
Adds a CBEAM card
- Parameters:
- pidint
property id
- midint
material id
- nidslist[int, int]
node ids; connected grid points at ends A and B
- xlist[float, float, float]
Components of orientation vector, from GA, in the displacement coordinate system at GA (default), or in the basic coordinate system
- g0int
Alternate method to supply the orientation vector using grid point G0. Direction of is from GA to G0. is then transferred to End A
- offtstr; default=’GGG’
Offset vector interpretation flag None : bit is active
- bitfloat; default=None
Built-in twist of the cross-sectional axes about the beam axis at end B relative to end A. For beam p-elements ONLY! None : offt is active
- pa / pbint; default=0
Pin Flag at End A/B. Releases the specified DOFs
- wa / wblist[float, float, float]
Components of offset vectors from the grid points to the end points of the axis of the shear center
- sa / sbint; default=0
Scalar or grid point identification numbers for the ends A and B, respectively. The degrees-of-freedom at these points are the warping variables . SA and SB cannot be specified for beam p-elements
- commentstr; default=’’
a comment for the card
- offt/bit are MSC specific fields
- classmethod add_card(card, beamor=None, comment='')[source]
Adds a CBEAM card from
BDF.add_card(...)
- Parameters:
- cardBDFCard()
a BDFCard object
- beamorBEAMOR() or None
defines the defaults
- commentstr; default=’’
a comment for the card
- center_of_mass()[source]
the centroid formuala is way more complicated if you consider the nonstructural mass axis
- center_of_mass_xform()[source]
A B ———- ^ ^ | wa | wb | | 1———-2
1-2 are the nodes of the bar A-B defines the axis of the shear center
^ z
+–+ | | | | | | 2—> y | +–+ | | +—–+
- cross_reference(model: BDF) None [source]
Cross links the card so referenced cards can be extracted directly
- Parameters:
- modelBDF()
the BDF object
- property ga: int
- property gb: int
- get_axes(model: BDF) tuple[bool, tuple[Any, Any, Any, Any, Any, Any]] [source]
Gets the axes of a CBAR/CBEAM, while respecting the OFFT flag.
- Returns:
- is_passed: bool
flag
- out: (v, ihat, jhat, khat, wa, wb)
data
Notes
pyNastran.bdf.cards.elements.bars.rotate_v_wa_wb()
for a description of the OFFT flag.
- get_axes_by_nodes(model: BDF, node1: GRID, node2: GRID, xyz1: np.ndarray, xyz2: np.ndarray, log: SimpleLogger) tuple[bool, Any] [source]
Gets the axes of a CBAR/CBEAM, while respecting the OFFT flag.
Notes
pyNastran.bdf.cards.elements.bars.rotate_v_wa_wb()
for a description of the OFFT flag.
- get_orientation_vector(model: BDF)[source]
Gets the axes of a CBAR/CBEAM, while respecting the OFFT flag.
Notes
pyNastran.bdf.cards.elements.bars.rotate_v_wa_wb()
for a description of the OFFT flag.
- get_x_g0_defaults()[source]
X and G0 compete for the same fields, so the method exists to make it easier to write the card
- Returns:
- x_g0varies
g0 : list[int, None, None] x : list[float, float, float]
Notes
Used by CBAR and CBEAM
- property is_bit
is the bit flag active?
- property is_offt
is the offt flag active?
- property node_ids
- repr_fields()[source]
Gets the fields in their simplified form
- Returns:
- fieldslist[varies]
the fields that define the card
- type = 'CBEAM'