Optimization cards (structmanager.sol200.cards_opt)

Many input cards related to the optimization problem are wrapped in this module. The input cards more related to the solver are contained in module structmanager.sol200.cards_solver.

Classes

structmanager.sol200.cards_opt.DCONSTR(dcid, ...) Design constraint
structmanager.sol200.cards_opt.DEQATN(eq) Equation to calculate customized responses
structmanager.sol200.cards_opt.DESVAR(label, ...) Design Variable
structmanager.sol200.cards_opt.DLINK(ddvid, ...) Link between design variables
structmanager.sol200.cards_opt.DRESP1(label, ...) Design response DRESP1
structmanager.sol200.cards_opt.DRESP2(label, ...) Design response DRESP2
structmanager.sol200.cards_opt.DRESP3(label, ...) Design response DRESP3
structmanager.sol200.cards_opt.DTABLE([...]) Design Table used to define many constants
structmanager.sol200.cards_opt.DVPREL1(type, ...) Design Variable-to-Property relation
class structmanager.sol200.cards_opt.BASEDV2[source]

Bases: structmanager.sol200.cards_opt.PRINTAUX

Base class for DVPREL2, DVCREL2 and DVMREL2

Methods

add_dtable
add_dvar
print_aux
class structmanager.sol200.cards_opt.DCONSTR(dcid, rid, lallow, uallow)[source]

Bases: object

Design constraint

Parameters:

dcid : int

Design constraint set identification number.

rid : int

The corresponding design response id.

lallow : float

Lower bound on the response quantity.

uallow : float

Upper bound on the response quantity.

Methods

print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DEQATN(eq)[source]

Bases: object

Equation to calculate customized responses

Parameters:

eq : str

A string containing the equation. For example, the following equation:

\[T(x_1, x_2, x_3) = \sqrt{x_1^2 + x_2^2 + x_3^2}\]

can be written as:

eq = 'T(x1,x2,x3)=SQRT(x1**2+x2**2+x3**2)'

Notes

Note

The DEQATN.print_card() method will split the equation, when necessary, in order to keep the limit length up to 56 characters in the first line, and 64 characters for the subsequent lines.

Methods

print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DESVAR(label, xinit, xlb, xub, dvprel1=None, code=None)[source]

Bases: object

Design Variable

Parameters:

label : str

User-supplied name for printing purposes.

xinit : float

Initial value.

xlb : float

Lower bound.

xub : float

Upper bound.

dvprel1 : DVPREL1 or None, optional

The corresponding design variable-to-property relation.

code : str or None, optional

An additional code to identify the design varible.

Methods

defaults
print_card
show_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.

Bases: object

Link between design variables

DLINK creates links among variables using the form:

\[dvar_{dependent} = c_0 + c_{mult} \times (c_1 \times {dvar}_1 + c_2 \times {dvar}_2)\]

where:

  • dvar_{dependent} is the dependent variable
  • {dvar}_i the i^{th} design variable
  • c_0 is a constant
  • c_{mult} is a common multiplier
  • c_i is an individual multiplier for {dvar}_i
Parameters:

ddvid : int

Dependent design variable identification number.

c0 : float

Constant term.

cmult : float

Constant multiplier.

idvs : list

The independent variables.

cs : list

The multipliers for each variable.

Notes

Be sure that no dependent variables are being used as independent variables.

By default c0 = 0 and cmult = 1.

The values of dvi and ci are inputed as follows:

indep_dv_c = [dv1, c1, dv2, c2, ...]
indep_dv_c = [1000000, 1., 1000001, 1., ...]

Methods

print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DRESP[source]

Bases: object

Base class to guarantee an unique id among all DRESPs

class structmanager.sol200.cards_opt.DRESP1(label, rtype, ptype, region=None, atta=None, attb=None, atti=None)[source]

Bases: structmanager.sol200.cards_opt.DRESP

Design response DRESP1

Parameters:

label : str

User-defined label.

rtype : str

Response type.

ptype : str

Element flag (‘ELEM’) or property entry name (‘PBAR’, PSHELL’ etc).

region : int or None, optional

Region identifier for constraint screening.

atta, attb: int or float or None :

Response attributes.

atti : int or float or None or list, optional

Response attributes.

Methods

print_card
print_card(file)[source]

Print the corresponding input card

class structmanager.sol200.cards_opt.DRESP2(label, eqid, region=None)[source]

Bases: structmanager.sol200.cards_opt.DRESP23

Design response DRESP2

Define equation responses that are used in the design, either as an objective function or as constraints.

Parameters:

label : str

User-defined label.

eqid : int or str

DEQATN entry identification number, or string informing a pre-programmed function.

region : int or None, optional

Region used for constraint screening.

Notes

To add variables, table entries or other DRESP1 responses use the methods: add_dvar(), add_dtable() and add_dresp1().

Methods

add_dresp1
add_dresp2
add_dtable
add_dvar
print_aux
print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DRESP23[source]

Bases: structmanager.sol200.cards_opt.PRINTAUX

Base class for DVPREL2, DVCREL2, DVMREL2, DRESP2, DRESP3 etc

Methods

add_dresp1
add_dresp2
add_dtable
add_dvar
print_aux
class structmanager.sol200.cards_opt.DRESP3(label, group, type, region='')[source]

Bases: structmanager.sol200.cards_opt.DRESP23

Design response DRESP3

Define use-subroutine or built-in responses that can be used in the design either as constraint or as an objective.

Parameters:

label : str

User-defined label.

group : str

Group name the external response type belongs to.

type : str

External response type.

region : int, optional

DEQATN entry identification number.

Notes

To add variables, table entries or other DRESP1 responses use the methods: add_dvar(), add_dtable() and add_dresp1().

Methods

add_dresp1
add_dresp2
add_dtable
add_dvar
print_aux
print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DTABLE(input_dict={})[source]

Bases: object

Design Table used to define many constants

Hints:

  • There can be any number of DTABLE entries in the bulk data.
  • The user must avoid repeated labels for constants
  • The constant label must be <= 8 characters.

All values for the constants must be of the ‘Real’ type. Ex:

input_dict={'c1':1. , 'c2':2., 'max8char':999.}

Methods

print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DVPREL[source]

Bases: object

Base class to guarantee an unique id among all DVPRELs

class structmanager.sol200.cards_opt.DVPREL1(type, pid, pname, dvids, coeffs, c0=0.0)[source]

Bases: object

Design Variable-to-Property relation

This is a wrapper for the DVPREL1 card in NASTRAN.

Parameters:

type : str

Name of a property entry, such as “PBAR”, “PBEAM”, etc.

pid : int

Property entry identification number.

pname : str

Parameter name such as “T”, “A”, “DIM1”, or a field position of the property entry.

dvids : list

Ids of the design variables that will be related to this property parameter.

coeffs : list

Multipliers to each corresponding design variable.

c0 : float, optional

Constant term of relation.

Methods

print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.DVPREL2(type, pid, pname, eqid)[source]

Bases: structmanager.sol200.cards_opt.BASEDV2

Design Variable-to-Property relation

This is a wrapper for the DVPREL1 card in NASTRAN.

Parameters:

type : str

Name of a property entry, such as “PBAR”, “PBEAM”, etc.

pid : int

Property entry identification number.

pname : str

Parameter name such as “T”, “A”, “DIM1”, or a field position of the property entry.

eqid : int or str

DEQATN entry identification number, or string informing a pre-programmed function.

Methods

add_dtable
add_dvar
print_aux
print_card
print_card(file)[source]

Print the corresponding input card

Parameters:

file : file

File object with a write() method.
class structmanager.sol200.cards_opt.PRINTAUX[source]

Bases: object

Base class for DRESP23 and BASEDV2

Methods

print_aux