`random_loads` Module¶

Inheritance diagram of pyNastran.bdf.cards.loads.random_loads

All static loads are defined in this file. This includes:

LSEQ

DAREA

SLOAD

RFORCE

RANDPS

class pyNastran.bdf.cards.loads.random_loads.RANDPS(sid, j, k, x=0.0, y=0.0, tid=0, comment='')[source]¶

Bases: pyNastran.bdf.cards.loads.random_loads.RandomLoad

Power Spectral Density Specification

Defines load set power spectral density factors for use in random analysis having the frequency dependent form:

\[S_{jk}(F) = (X+iY)G(F)\]

Creates a RANDPS card

Parameters:	sid : int random analysis set id defined by RANDOM in the case control deck j : int Subcase id of the excited load set k : int Subcase id of the applied load set k > j x / y : float; default=0.0 Components of the complex number tid : int; default=0 TABRNDi id that defines G(F) comment : str; default=’‘ a comment for the card

Tid(self)[source]¶

classmethod _init_from_empty()[source]¶

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

Adds a RANDPS 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

get_loads(self)[source]¶

j = None¶: Subcase identification number of the excited load set. (Integer > 0)

k = None¶: Subcase identification number of the applied load set. (Integer >= 0; K >= J)

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

safe_cross_reference(self, model, xref_errors)[source]¶

sid = None¶: Random analysis set identification number. (Integer > 0) Defined by RANDOM in the Case Control Deck.

tid = None¶: Identification number of a TABRNDi entry that defines G(F).

type = 'RANDPS'¶

uncross_reference(self)[source]¶: Removes cross-reference links

validate(self)[source]¶: card checking method that should be overwritten

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

x = None¶: Components of the complex number. (Real)

class pyNastran.bdf.cards.loads.random_loads.RANDT1(sid, n, t0, tmax, comment='')[source]¶