damper Module

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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: LineDamper

Creates a CDAMP1 card

Parameters:

eidint

element id

pidint

property id (PDAMP)

nidslist[int, int]

node ids

c1 / c2int; default=0

DOF for nid1 / nid2

commentstr; default=’’

a comment for the card

B()

classmethod add_card(card, comment='')

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

Parameters:

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids()

property node_ids

raw_fields()

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CDAMP1'

uncross_reference() → None

Removes cross-reference links

validate()

card checking method that should be overwritten

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: LineDamper

Creates a CDAMP2 card

Parameters:

eidint

element id

bfloat

damping

nidslist[int, int]

SPOINT ids node ids

c1 / c2int; default=0

DOF for nid1 / nid2

commentstr; default=’’

a comment for the card

B()

classmethod add_card(card, comment='')

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

Parameters:

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

b

Value of the scalar damper (Real)

c1

component number

cp_name_map = {'B': 'b'}

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids()

property node_ids

raw_fields()

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CDAMP2'

uncross_reference() → None

Removes cross-reference links

validate()

card checking method that should be overwritten

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: LineDamper

1	2	3	4	5
CDAMP3	EID	PID	S1	S2

Creates a CDAMP3 card

Parameters:

eidint

element id

pidint

property id (PDAMP)

nidslist[int, int]

SPOINT ids

commentstr; default=’’

a comment for the card

B()

classmethod add_card(card, comment='')

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

Parameters:

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

property node_ids

raw_fields()

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CDAMP3'

uncross_reference() → None

Removes cross-reference links

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: LineDamper

Creates a CDAMP4 card

Parameters:

eidint

element id

bfloat

damping

nidslist[int, int]

SPOINT ids

commentstr; default=’’

a comment for the card

B()

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

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

property node_ids

raw_fields()

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CDAMP4'

uncross_reference() → None

Removes cross-reference links

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: LineDamper

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

Creates a CDAMP5 card

Parameters:

eidint

element id

pidint

property id (PDAMP5)

nidslist[int, int]

GRID/SPOINT ids

commentstr; default=’’

a comment for the card

B()

classmethod add_card(card, comment='')

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

Parameters:

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

property node_ids

raw_fields()

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CDAMP5'

uncross_reference() → None

Removes cross-reference links

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: LineDamper

Viscous Damper Connection Defines a viscous damper element.

1	2	3	4	5
CVISC	EID	PID	G1	G2

Creates a CVISC card

Parameters:

eidint

element id

pidint

property id (PVISC)

nidslist[int, int]

GRID ids

commentstr; default=’’

a comment for the card

B()

classmethod add_card(card, comment='')

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

Parameters:

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

classmethod export_to_hdf5(h5_file, model, eids)

exports the elements in a vectorized way

get_edge_ids()

property node_ids

raw_fields()

repr_fields()

Gets the fields in their simplified form

Returns:

fieldslist[varies]

the fields that define the card

safe_cross_reference(model: BDF, xref_errors)

Cross links the card so referenced cards can be extracted directly

Parameters:

modelBDF()

the BDF object

type = 'CVISC'

uncross_reference() → None

Removes cross-reference links

write_card(size: int = 8, is_double: bool = False) → str

Writes the card with the specified width and precision

Parameters:

sizeint (default=8)

size of the field; {8, 16}

is_doublebool (default=False)

is this card double precision

Returns:

msgstr

the string representation of the card

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

Bases: Element

dummy init

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

Bases: DamperElement

dummy init