semiimplicit#

NonlinearOptions.semiimplicit(option='', type_='', value='', **kwargs)#

Specifies parameters for a semi-implicit solution.

Mechanical APDL Command: SEMIIMPLICIT

Parameters:
optionstr

Option to be performed:

  • ETOI - Criterion for transitioning from the semi-implicit solution phase to the implicit solution phase.

  • MSCA - Selective mass scaling factor used during the semi-implicit solution phase.

  • SFAC - Safety factor for time incrementation used during the semi-implicit solution phase.

  • AUTS - Automatic time stepping and bisection controls used during the semi-implicit solution phase.

  • BVIS - Bulk viscosity controls used during the semi-implicit solution phase.

  • EFRQ - Output and restart file frequency used during the semi-implicit solution phase.

type_str

Additional input; varies depending on the Option value. See table below.

valuestr

Additional input; varies depending on the Option and Type values. See table below.

Notes

This command triggers a semi-implicit solution scheme in which the analysis transitions to a semi-implicit solution method when the implicit solution method fails to converge. The command is valid only in the solution processor ( slashsolu ) and must be defined before the first solve command.

The semiimplicit command can be used in a restart, even if the base analysis did not include the command. Therefore, a problem that failed in the implicit analysis can be restarted with this command so that it can transition to the semi-implicit method and solve further.

The semiimplicit command can overwrite the values on some commands, as described in the following table.

This command contains some tables and extra information which can be inspected in the original documentation pointed above.