damper Module

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

• PDAMP

• PDAMP5 (not implemented)

• PDAMPT

• PVISC

All damper properties are DamperProperty and Property objects.

class pyNastran.bdf.cards.properties.damper.DamperProperty

Bases: pyNastran.bdf.cards.base_card.Property

dummy init

cross_reference(model: BDF) → None

uncross_reference() → None

Removes cross-reference links

class pyNastran.bdf.cards.properties.damper.PDAMP(pid, b, comment='')

Bases: pyNastran.bdf.cards.properties.damper.DamperProperty

1	2	3	4	5	6	7	8	9
PDAMP	PID1	B1	PID2	B2	PID3	B3	PID4	B4
PDAMP	1	2.0

dummy init

B()

classmethod _init_from_empty()

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

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

Parameters

cardBDFCard()

a BDFCard object

icardint; default=0

the index of the card that’s being parsed

commentstr; default=’’

a comment for the card

b = None

Force per unit velocity (Real)

pid = None

Property ID

pname_fid_map = {3: 'b', 'B1': 'b'}

raw_fields()

repr_fields()

Gets the fields in their simplified form

Returns

fieldsList[varies]

the fields that define the card

type = 'PDAMP'

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.properties.damper.PDAMP5(pid, mid, b, comment='')

Bases: pyNastran.bdf.cards.properties.damper.DamperProperty

Defines the damping multiplier and references the material properties for damping. CDAMP5 is intended for heat transfer analysis only.

Mid()

returns the material ID of an element

Returns

midint

the Material ID

classmethod _init_from_empty()

classmethod add_card(card, comment='')

Adds a PDAMP5 card from BDF.add_card(...)

Parameters

cardBDFCard()

a BDFCard object

commentstr; default=’’

a comment for the card

b = None

Damping multiplier. (Real > 0.0) B is the mass that multiplies the heat capacity CP on the MAT4 or MAT5 entry.

cross_reference(model: BDF) → None

Cross links the card so referenced cards can be extracted directly

Parameters

modelBDF()

the BDF object

mid = None

Material ID

pid = None

Property ID

raw_fields()

repr_fields()

Gets the fields in their simplified form

Returns

fieldsList[varies]

the fields that define the card

type = 'PDAMP5'

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.properties.damper.PDAMPT(pid, tbid, comment='')

Bases: pyNastran.bdf.cards.properties.damper.DamperProperty

dummy init

Tbid()

classmethod _init_from_empty()

classmethod add_card(card, comment='')

Adds a PDAMPT 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

pid = None

Property ID

pname_fid_map = {}

raw_fields()

repr_fields()

Gets the fields in their simplified form

Returns

fieldsList[varies]

the fields that define the card

tbid = None

Identification number of a TABLEDi entry that defines the damping force per-unit velocity versus frequency relationship

type = 'PDAMPT'

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.properties.damper.PVISC(pid, ce, cr, comment='')

Bases: pyNastran.bdf.cards.properties.damper.DamperProperty

Viscous Damping Element Property Defines properties of a one-dimensional viscous damping element (CVISC entry).

1	2	3	4	5	6	7
PVISC	PID1	CE1	CR1	PID2	CE2	CR2
PVISC	3	6.2	3.94

Creates a PVISC card

Parameters

pidint

property id for a CVISC

cefloat

Viscous damping values for extension in units of force per unit velocity

crfloat

Viscous damping values for rotation in units of moment per unit velocity.

commentstr; default=’’

a comment for the card

classmethod _init_from_empty()

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

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

Parameters

cardBDFCard()

a BDFCard object

icardint; default=0

the index of the card that’s being parsed

commentstr; default=’’

a comment for the card

cross_reference(model: BDF) → None

pname_fid_map = {'CE1': 'ce'}

raw_fields()

repr_fields()

Gets the fields in their simplified form

Returns

fieldsList[varies]

the fields that define the card

type = 'PVISC'

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