mass Module

Inheritance diagram of pyNastran.bdf.cards.properties.mass

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

  • NSM
  • PMASS

All mass properties are PointProperty and Property objects.

class pyNastran.bdf.cards.properties.mass.NSM(sid, nsm_type, pid_eid, value, comment='')[source]

Bases: pyNastran.bdf.cards.properties.mass.NSMx

Defines a set of non structural mass.

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NSM SID TYPE ID VALUE ID VALUE ID VALUE

See NSMx

classmethod _init_from_empty()[source]
_properties = ['ids']
type = 'NSM'
class pyNastran.bdf.cards.properties.mass.NSM1(sid, nsm_type, value, pid_eid, comment='')[source]

Bases: pyNastran.bdf.cards.properties.mass.NSM1x

Defines a set of non structural mass.

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NSM1 SID TYPE VALUE ID ID ID ID ID
  ID ID ID etc        

See NSM1x

classmethod _init_from_empty()[source]
type = 'NSM1'
class pyNastran.bdf.cards.properties.mass.NSM1x(sid, nsm_type, value, ids, comment='')[source]

Bases: pyNastran.bdf.cards.base_card.Property

Common class for NSM1 and NSML1

Creates an NSM1/NSML1 card

Parameters:
sid : int

Case control NSM id

nsm_type : str

Type of card the NSM is applied to valid_properties = {

PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PBCOMP, PROD, CONROD, PBEND, PSHEAR, PTUBE, PCONEAX, PRAC2D, ELEMENT

}

value : float

NSM1: the non-structural pass per unit length/area NSML1: the total non-structural pass per unit length/area;

the nsm will be broken down based on a weighted area/length

ids : List[int]

property ids or element ids depending on nsm_type

comment : str; default=’‘

a comment for the card
Type

gets the nsm_type

classmethod add_card(card, comment='')[source]

Adds a NSM1/NSML1 card from BDF.add_card(...)

Parameters:
card : BDFCard()

a BDFCard object

comment : str; default=’‘

a comment for the card
cross_reference(self, model)[source]
raw_fields(self)[source]
repr_fields(self)[source]

Gets the fields in their simplified form

Returns:
fields : List[varies]

the fields that define the card
valid_properties = ['PSHELL', 'PCOMP', 'PBAR', 'PBARL', 'PBEAM', 'PBEAML', 'PBCOMP', 'PROD', 'CONROD', 'PBEND', 'PSHEAR', 'PTUBE', 'PCONEAX', 'PRAC2D', 'ELEMENT']
write_card(self, size=8, is_double=False)[source]

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.properties.mass.NSMADD(sid, sets, comment='')[source]

Bases: pyNastran.bdf.cards.base_card.BaseCard

Defines non structural mass as the sum of the sets listed.

1 2 3 4
NSMADD 2 1 3

Creates an NSMADD card, which sum NSM sets

Parameters:
sid : int

the NSM Case Control value

sets : List[int]

the NSM, NSM1, NSML, NSML1 values

comment : str; default=’‘

a comment for the card
classmethod _init_from_empty()[source]
_properties = ['nsm_ids']
classmethod add_card(card, comment='')[source]

Adds a NSMADD 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
nsm_ids

gets the nonstructural-mass ids

raw_fields(self)[source]
safe_cross_reference(self, model, debug=True)[source]
type = 'NSMADD'
uncross_reference(self)[source]

Removes cross-reference links

write_card(self, size=8, is_double=False)[source]

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
write_card_16(self, is_double=False)[source]
class pyNastran.bdf.cards.properties.mass.NSML(sid, nsm_type, pid_eid, value, comment='')[source]

Bases: pyNastran.bdf.cards.properties.mass.NSMx

Defines a set of lumped non structural mass.

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NSML SID TYPE ID VALUE ID VALUE ID VALUE

Creates an NSML card, which defines lumped non-structural mass

Parameters:
sid : int

Case control NSM id

nsm_type : str

Type of card the NSM is applied to valid_properties = {

PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PBCOMP, PROD, CONROD, PBEND, PSHEAR, PTUBE, PCONEAX, PRAC2D, ELEMENT

}

pid_eid : int

property id or element id depending on nsm_type

value : float

the non-structural pass per unit length/area

comment : str; default=’‘

a comment for the card
classmethod _init_from_empty()[source]
_properties = ['ids']
type = 'NSML'
class pyNastran.bdf.cards.properties.mass.NSML1(sid, nsm_type, value, ids, comment='')[source]

Bases: pyNastran.bdf.cards.properties.mass.NSM1x

Defines lumped non structural mass entries by VALUE,ID list.

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NSML1 SID TYPE VALUE ID ID ID ID ID
  ID ID ID etc        
NSML1 3 ELEMENT .044 1240 1500      
NSML1 SID TYPE VALUE ID THRU ID ID THRU
  ID ID THRU ID ID THRU ID ID
  THRU ID …          
NSML1 15 PSHELL .067 1240 THRU 1760    
  2567 THRU 2568 35689 THRU 40998    
  76 THRU 300          
NSML1 SID TYPE VALUE ID THRU ID BY N
  ID THRU ID BY N      
NSML1 3 PSHELL .067 1240 THRU 1760 1763 1764
  2567 THRU 2568 35689 TO 40999 BY 2
  76666 76668 79834          

Creates an NSML card, which defines lumped non-structural mass

Parameters:
sid : int

Case control NSM id

nsm_type : str

Type of card the NSM is applied to valid_properties = {

PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PBCOMP, PROD, CONROD, PBEND, PSHEAR, PTUBE, PCONEAX, PRAC2D, ELEMENT

}

value : float

the non-structural pass per unit length/area

ids : List[int]

property ids or element ids depending on nsm_type

comment : str; default=’‘

a comment for the card
classmethod _init_from_empty()[source]
type = 'NSML1'
class pyNastran.bdf.cards.properties.mass.NSMx(sid, nsm_type, pid_eid, value, comment='')[source]

Bases: pyNastran.bdf.cards.base_card.Property

Common class for NSM and NSML

Creates an NSM/NSM1 card

Parameters:
sid : int

Case control NSM id

nsm_type : str

Type of card the NSM is applied to valid_properties = {

PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PBCOMP, PROD, CONROD, PBEND, PSHEAR, PTUBE, PCONEAX, PRAC2D, ELEMENT

}

pid_eid : int

property id or element id depending on nsm_type

value : float

the non-structural pass per unit length/area

comment : str; default=’‘

a comment for the card
Type

gets the nsm_type

classmethod add_card(card, icard=0, comment='')[source]

Adds an NSM card from BDF.add_card(...)

Parameters:
card : BDFCard()

a BDFCard object

icard : int; default=0

the index of the card that’s being parsed

comment : str; default=’‘

a comment for the card
cross_reference(self, model)[source]
ids
raw_fields(self)[source]
repr_fields(self)[source]

Gets the fields in their simplified form

Returns:
fields : List[varies]

the fields that define the card
valid_properties = ['PSHELL', 'PCOMP', 'PBAR', 'PBARL', 'PBEAM', 'PBEAML', 'PBCOMP', 'PROD', 'CONROD', 'PBEND', 'PSHEAR', 'PTUBE', 'PCONEAX', 'PRAC2D', 'ELEMENT', 'PDUM8']

Set points to either Property entries or Element entries. Properties are:

write_card(self, size=8, is_double=False)[source]

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.properties.mass.PMASS(pid, mass, comment='')[source]

Bases: pyNastran.bdf.cards.base_card.Property

Scalar Mass Property Specifies the mass value of a scalar mass element (CMASS1 or CMASS3 entries).

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PMASS PID1 M1 PID2 M2 PID3 M3 PID4 M4
PMASS 7 4.29 6 13.2        

Creates an PMASS card, which defines a mass applied to a single DOF

Parameters:
pid : int

Property id used by a CMASS1/CMASS3 card

mass : float

the mass to apply

comment : str; default=’‘

a comment for the card
Mass(self)[source]
classmethod _init_from_empty()[source]
_properties = ['node_ids']
classmethod add_card(card, icard=0, comment='')[source]

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

Parameters:
card : BDFCard()

a BDFCard object

icard : int; default=0

the index of the card that’s being parsed

comment : str; default=’‘

a comment for the card
cross_reference(self, model)[source]
pname_fid_map = {3: 'mass'}
raw_fields(self)[source]
repr_fields(self)[source]

Gets the fields in their simplified form

Returns:
fields : List[varies]

the fields that define the card
type = 'PMASS'
uncross_reference(self)[source]

Removes cross-reference links

write_card(self, size=8, is_double=False)[source]

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