Card 9 - DESIGN_VARIABLE

KODE

KODE is the code DESIGN_VARIABLE (or 132)

N1

N1 is the DESIGN_VARIABLE card ID. Cards with the same ID reference the same optimization design variables.

T1

T1 specifies the type of data that is being defined for the design variable. Typical values correspond to the design variable attributes such as the name, initial value, minimum value, maximum value, and status of the design variable.

T1 = NAME

T1 = NAME (or 1) specifies the name of the optimization design variable in T2. T2 is a character string enclosed in double quotes that defines the design variable name. For example: DESIGN_VARIABLE 1 NAME "DV1_CPU_to_PCB_HTC".

T1 = INITIAL

T1 = INITIAL (or 2) specifies the initial value of the optimization design variable in T2. T2 is a numeric value that defines the initial value used by the optimizer at the start of the thermal correlation analysis. With the substitution method, the initial value equals the original quantity value. With the multiplier method, the initial value is typically one.

T1 = MINIMUM

T1 = MINIMUM (or 3) specifies the lower bound for the optimization design variable in T2. T2 is a numeric value that defines the minimum allowable value for the design variable. The optimizer does not reduce the design variable below this value.

T1 = MAXIMUM

T1 = MAXIMUM (or 4) specifies the upper bound for the optimization design variable in T2. T2 is a numeric value that defines the maximum allowable value for the design variable. The optimizer does not increase the design variable above this value.

T1 = STATUS

T1 = STATUS (or 5) controls whether the design variable is active in the optimization in T2.

• T2 = ACTIVE: the design variable is considered by the optimizer.
• T2 = INACTIVE: the design variable is ignored by the optimizer and keeps its initial value for all design cycles.

T1 = METHOD

T1 = METHOD (or 6) specifies the method to define the design variable for a thermal correlation analysis.

• T2 = MULTIPLIER multiplies one or more expressions or parameters by the design variable.
• T2 = SUBSTITUTION replaces expressions or parameters with the design variable.

T1 = MATERIAL

T1 = MATERIAL (or 7) specifies the ID of the material card in T2. Only used if the design variable is applied to a material property.

T1 = PROPERTY

T1 = PROPERTY (or 8) specifies the type of material property in T2. Only used if the design variable is applied to a material property.

• T2 = CPP: The design variable is applied to the specific heat of the material.
• T2 = KTHERM: The design variable is applied to the thermal conductivity of the material.

Code example

DESIGN_VARIABLE 5 NAME "ABS_Thermal_Conductivity"
DESIGN_VARIABLE 5 INITIAL 1.0000
DESIGN_VARIABLE 5 MINIMUM 0.8000
DESIGN_VARIABLE 5 STATUS ACTIVE
DESIGN_VARIABLE 5 METHOD MULTIPLIER
DESIGN_VARIABLE 5 MATERIAL 4
DESIGN_VARIABLE 5 PROPERTY KTHERM