THOPT, Refopt, REFORMTOL, NTABPOINTS, TEMPMIN, TEMPMAX, --, ALGO
Specifies nonlinear transient thermal solution options.
RefoptMatrix reform option.
FULL | — | Use the full Newton-Raphson solution option (default). All subsequent input values are ignored. |
QUASI | — | Use a selective reform solution
option based on |
REFORMTOLProperty change tolerance for Matrix Reformation (.05
default). The thermal matrices are reformed if the maximum material
property change in an element (from the previous reform time) is greater
than the reform tolerance. Valid only when Refopt = QUASI.
NTABPOINTSNumber of points in Fast Material Table (64 default).
Valid only when Refopt = QUASI.
TEMPMINMinimum temperature for Fast Material Table. Defaults
to the minimum temperature defined by the MPTEMP command for any material property defined. Valid only when Refopt = QUASI.
TEMPMAXMaximum temperature for Fast Material Table. Defaults
to the maximum temperature defined by the MPTEMP command for any material property defined. Valid only when Refopt = QUASI.
Reserved field.
ALGOSpecifies which solution algorithm to apply:
0 | — | Multipass (default). |
1 | — | Iterative. |
Valid only when Refopt = QUASI.
The QUASI matrix reform option is supported by the ICCG, JCG, PCG, and sparse solvers only (EQSLV).
For Refopt = QUASI:
Results from a restart may be different than results
from a single run because the stiffness matrices are always recreated
in a restart run, but may or may not be in a single run (depending
on the behavior resulting from the REFORMTOL setting). Additionally, results may differ between two single runs
as well, if the matrices are reformed as a result of the REFORMTOL setting.
Midside node temperatures are not calculated if 20-node thermal solid elements (SOLID90 or SOLID279) are used.
For more information, see Solution Algorithms Used in Transient Thermal Analysis in the Thermal Analysis Guide.