*SRADIATE
18.30 *SRADIATE: Specifys urfaceradiation conditions in heat transfer analysis.
This option is used to apply surface radiation boundary conditions between a nonc oncave surface and a
nonreflecting environment in fully coupled thermal-stress ana lysis. In ABAQ US/Standard it is also used
for heat transfer and coupled thermal-electrical analyses.
It must be used in conjunction with the *PHYSICAL CONSTANTSoption, which is used to define the
Stefan-Boltzmann constant.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: History data
Level: Step
Reference:
•“Thermal loads,” Section 27.4.4 of the ABAQUS Analysis User’s Manual
Optional parameters:
AMPLITUDE
Set this parameter equal to the name of the *AMPLITUDE option that gives the variationof the
ambient temperature with time.
If this parameter is omitted in an ABAQUS/Standard a nalysis, the reference magnitude is
applied immediately at the beginning of the step or linearly overthe ste p, depending on the value
assigned to the AMPLITUDE parameter on the *STEP option (see “Procedures: overview,”
Section 6.1.1 of the ABAQUS Analysis User’s Manual). If this parameter is omitted in an
ABAQUS/Explicit analysis, the reference magnitude i sa pplied immediately at the beginning of
the step.
OP
Set OP=MOD (default) for existing *SRADIATE definitions to remain, with this option m odifying
existing radiation conditions or defining additional radiation conditions.
Set OP=NEW if all existing *SRADIATE definitions applied to the model should be removed.
Data lines to define surface radiation conditions:
First line:
1. Surface name.
2. Radiationtype label R.
3. Referenceambient temperature value, .(Unitsof .)
18.30–1
ABAQUS Version 6.1 Module: ID:
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