tunif

Mapdl.tunif(temp='', **kwargs)

Assigns a uniform temperature to all nodes.

APDL Command: TUNIF

Parameters:

temp

Uniform temperature assigned to the nodes. If a TEMP value is not specified, the uniform temperature is set to zero.

Notes

TUNIF is a convenient form of the more general BFUNIF command.

In a transient or nonlinear thermal analysis, the uniform temperature is used during the first iteration of a solution as follows:

as the starting nodal temperature (except where temperatures are explicitly specified [D, DK]),

to evaluate temperature-dependent material properties.

In a structural analysis or an explicit dynamic analysis, the uniform temperature is used as the default temperature for thermal strain calculations and material property evaluation (except where body load temperatures are specified (BF, BFE, BFK, LDREAD). In other scalar field analyses, the uniform temperature is used for material property evaluation.

Because TUNIF (or BFUNIF,TEMP) is step-applied in the first iteration, issue a BF,ALL,TEMP,Value command to ramp on a uniform temperature load.

When the TUNIF command is used in an explicit dynamic analysis, you cannot apply temperature loading via the EDLOAD,,TEMP command. Furthermore, temperature loading defined by TUNIF cannot be listed or deleted by the EDLOAD command.

The command default sets the uniform temperature to the reference temperature defined via the TREF command only (and not the MP,REFT command).

If using the command default to set the uniform temperature (to the reference temperature set via TREF), you can convert temperature- dependent secant coefficients of thermal expansion (SCTEs) from the definition temperature to the uniform temperature. To do so, issue the MPAMOD command.

This command is also valid in PREP7.