damper Module

All damper elements are defined in this file. This includes:

• CDAMP1
• CDAMP2
• CDAMP3
• CDAMP4
• CDAMP5
• CVISC

All damper elements are DamperElement and Element objects.

class pyNastran.bdf.cards.elements.damper.CDAMP1(eid, pid, nids, c1=0, c2=0, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

Creates a CDAMP1 card

Parameters:

eid : int

element id

pid : int

property id (PDAMP)

nids : List[int, int]

node ids

c1 / c2 : int; default=0

DOF for nid1 / nid2

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, comment='')

Adds a CDAMP1 card from BDF.add_card(...)

Parameters:

card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids(self)

node_ids

raw_fields(self)

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CDAMP1'

uncross_reference(self)

Removes cross-reference links

validate(self)

card checking method that should be overwritten

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.CDAMP2(eid, b, nids, c1=0, c2=0, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

Creates a CDAMP2 card

Parameters:

eid : int

element id

b : float

damping

nids : List[int, int]

SPOINT ids node ids

c1 / c2 : int; default=0

DOF for nid1 / nid2

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, comment='')

Adds a CDAMP2 card from BDF.add_card(...)

Parameters:

card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card

b = None

Value of the scalar damper (Real)

c1 = None

component number

cp_name_map = {'B': 'b'}

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids(self)

node_ids

raw_fields(self)

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CDAMP2'

uncross_reference(self)

Removes cross-reference links

validate(self)

card checking method that should be overwritten

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.CDAMP3(eid, pid, nids, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

1	2	3	4	5
CDAMP3	EID	PID	S1	S2

Creates a CDAMP3 card

Parameters:

eid : int

element id

pid : int

property id (PDAMP)

nids : List[int, int]

SPOINT ids

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, comment='')

Adds a CDAMP3 card from BDF.add_card(...)

Parameters:

card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

node_ids

raw_fields(self)

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CDAMP3'

uncross_reference(self)

Removes cross-reference links

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.CDAMP4(eid, b, nids, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

Creates a CDAMP4 card

Parameters:

eid : int

element id

b : float

damping

nids : List[int, int]

SPOINT ids

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, icard=0, comment='')

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

node_ids

raw_fields(self)

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CDAMP4'

uncross_reference(self)

Removes cross-reference links

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.CDAMP5(eid, pid, nids, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

Defines a damping element that refers to a material property entry and connection to grid or scalar points.

Creates a CDAMP5 card

Parameters:

eid : int

element id

pid : int

property id (PDAMP5)

nids : List[int, int]

GRID/SPOINT ids

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, comment='')

Adds a CDAMP5 card from BDF.add_card(...)

Parameters:

card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

node_ids

raw_fields(self)

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CDAMP5'

uncross_reference(self)

Removes cross-reference links

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.CVISC(eid, pid, nids, comment='')

Bases: pyNastran.bdf.cards.elements.damper.LineDamper

Viscous Damper Connection Defines a viscous damper element.

1	2	3	4	5
CVISC	EID	PID	G1	G2

Creates a CVISC card

Parameters:

eid : int

element id

pid : int

property id (PVISC)

nids : List[int, int]

GRID ids

comment : str; default=’‘

a comment for the card

B(self)

classmethod add_card(card, comment='')

Adds a CVISC card from BDF.add_card(...)

Parameters:

card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card

cross_reference(self, model)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids(self)

node_ids

raw_fields(self)

repr_fields(self)

Gets the fields in their simplified form

Returns:

fields : List[varies]

the fields that define the card

safe_cross_reference(self, model, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

model : BDF()

the BDF object

type = 'CVISC'

uncross_reference(self)

Removes cross-reference links

write_card(self, size=8, is_double=False)

Writes the card with the specified width and precision

Parameters:

size : int (default=8)

size of the field; {8, 16}

is_double : bool (default=False)

is this card double precision

Returns:

msg : str

the string representation of the card

class pyNastran.bdf.cards.elements.damper.DamperElement

Bases: pyNastran.bdf.cards.base_card.Element

class pyNastran.bdf.cards.elements.damper.LineDamper

Bases: pyNastran.bdf.cards.elements.damper.DamperElement