Abaqus Keywords Reference Manual  

*SOLVER CONTROLS
Specify controls for the iterative and direct linear solvers.

This option is used to set the control parameters for both the direct and iterative linear equation solvers.

Product: Abaqus/Standard  

Type: History data

Level: Step

References:

Optional parameters:

CONSTRAINT OPTIMIZATION

Include this parameter to optimize the handling of hard contact and compressibility constraints associated with hybrid elements.

RESET

Include this parameter to reset all of the iterative solver controls to their default values. The option should have no data lines when this parameter is used.

If this parameter is omitted, only the iterative solver specified controls will be changed in the current step; the other controls will remain at their settings from previous steps.

Data line to define control parameters: 

First (and only) line:

  1. Relative tolerance for convergence. The default is 10–6.

  2. Maximum number of linear solver iterations. The default is 300.

  3. Number of domains. By default, Abaqus/Standard will determine the number of domains automatically based on the number of equations in the model. The number of domains must always be greater than or equal to the number of CPUs.