springs
Module¶
All spring elements are defined in this file. This includes:
- CELAS1
- CELAS2
- CELAS3
- CELAS4
All spring elements are SpringElement and Element objects.
-
class
pyNastran.bdf.cards.elements.springs.
CELAS1
(eid, pid, nids, c1=0, c2=0, comment='')[source]¶ Bases:
pyNastran.bdf.cards.elements.springs.SpringElement
1 2 3 4 5 6 7 CELAS1 EID PID G1 C1 G2 C2 Creates a CELAS1 card
Parameters: - eid : int
element id
- pid : int
property id (PELAS)
- nids : List[int, int]
node ids
- c1 / c2 : int; default=0
DOF for nid1 / nid2
- comment : str; default=’‘
a comment for the card
-
classmethod
add_card
(card, comment='')[source]¶ Adds a CELAS1 card from
BDF.add_card(...)
Parameters: - card : BDFCard()
a BDFCard object
- comment : str; default=’‘
a comment for the card
-
c1
= None¶ component number
-
cross_reference
(self, model)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
node_ids
¶
-
safe_cross_reference
(self, model, xref_errors)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
type
= 'CELAS1'¶
-
class
pyNastran.bdf.cards.elements.springs.
CELAS2
(eid, k, nids, c1=0, c2=0, ge=0.0, s=0.0, comment='')[source]¶ Bases:
pyNastran.bdf.cards.elements.springs.SpringElement
1 2 3 4 5 6 7 8 9 CELAS2 EID K G1 C1 G2 C2 GE S Creates a CELAS2 card
Parameters: - eid : int
element id
- k : float
spring stiffness
- nids : List[int, int]
SPOINT ids node ids
- c1 / c2 : int; default=0
DOF for nid1 / nid2
- ge : int; default=0.0
damping coefficient
- s : float; default=0.0
stress coefficient
- comment : str; default=’‘
a comment for the card
-
classmethod
add_card
(card, comment='')[source]¶ Adds a CELAS2 card from
BDF.add_card(...)
Parameters: - card : BDFCard()
a BDFCard object
- comment : str; default=’‘
a comment for the card
-
c1
= None¶ component number
-
cp_name_map
= {'GE': 'ge', 'K': 'k', 'S': 's'}¶
-
cross_reference
(self, model)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
ge
= None¶ damping coefficient
-
k
= None¶ stiffness of the scalar spring
-
node_ids
¶
-
repr_fields
(self)[source]¶ Gets the fields in their simplified form
Returns: - fields : List[varies]
the fields that define the card
-
s
= None¶ stress coefficient
-
safe_cross_reference
(self, model, xref_errors)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
type
= 'CELAS2'¶
-
class
pyNastran.bdf.cards.elements.springs.
CELAS3
(eid, pid, nodes, comment='')[source]¶ Bases:
pyNastran.bdf.cards.elements.springs.SpringElement
1 2 3 4 5 CELAS3 EID PID S1 S2 Creates a CELAS3 card
Parameters: - eid : int
element id
- pid : int
property id (PELAS)
- nids : List[int, int]
SPOINT ids
- comment : str; default=’‘
a comment for the card
-
classmethod
add_card
(card, comment='')[source]¶ Adds a CELAS3 card from
BDF.add_card(...)
Parameters: - card : BDFCard()
a BDFCard object
- comment : str; default=’‘
a comment for the card
-
cross_reference
(self, model)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
node_ids
¶
-
nodes
= None¶ Scalar point identification numbers
-
safe_cross_reference
(self, model, xref_errors)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
type
= 'CELAS3'¶
-
class
pyNastran.bdf.cards.elements.springs.
CELAS4
(eid, k, nodes, comment='')[source]¶ Bases:
pyNastran.bdf.cards.elements.springs.SpringElement
1 2 3 4 5 CELAS4 EID K S1 S2 Creates a CELAS4 card
Parameters: - eid : int
element id
- k : float
spring stiffness
- nids : List[int, int]
SPOINT ids
- comment : str; default=’‘
a comment for the card
-
classmethod
add_card
(card, comment='')[source]¶ Adds a CELAS4 card from
BDF.add_card(...)
Parameters: - card : BDFCard()
a BDFCard object
- comment : str; default=’‘
a comment for the card
-
cp_name_map
= {'K': 'k'}¶
-
cross_reference
(self, model)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
k
= None¶ stiffness of the scalar spring
-
node_ids
¶
-
safe_cross_reference
(self, model, xref_errors)[source]¶ Cross links the card so referenced cards can be extracted directly
Parameters: - model : BDF()
the BDF object
-
type
= 'CELAS4'¶
-
class
pyNastran.bdf.cards.elements.springs.
SpringElement
[source]¶