OPNCONTROL, Lab, VALUE, NUMSTEP
Sets decision parameter for automatically increasing the
time step interval.
LabDOF | — | Degree-of-freedom label used to base a decision for increasing the time step (substep) interval in a nonlinear or transient analysis. The only DOF label currently supported is TEMP. |
OPENUPFACTOR | — | Factor for increasing the time step interval. Specify when AUTOTS,ON is
issued and specify a |
VALUE, NUMSTEPTwo values used in the algorithm for determining if
the time step interval can be increased. Valid only when Lab = DOF.
The time step interval is increased
if the maximum absolute value of the incremental solution at the specified
DOF label is less than VALUE for the number
of contiguous time steps specified by NUMSTEP. The default VALUE = 0.1 and the default NUMSTEP = 3.
This command is available only for nonlinear static or full transient analysis. For linear full transient analysis, where the time step interval can be
predominantly determined by the estimated modal frequency (number of solution points in a cycle
in the dynamic system), the OPENUPFACTOR specified may show no
effect.