Abaqus Analysis User's Guide
20.2.2 aStudy.constrain(): Constrain parameter value combinations in parametric studies.
Products: Abaqus/Standard Abaqus/Explicit
This command is used to define constraints on parameter value combinations; combinations that violate any of the constraints are eliminated from the parametric study.
Required data:
constraint expression
Provide a constraint expression enclosed by matching quotation marks. This expression may involve operations among parameters, numbers, and previously defined Python variables; for example, 'height*width < maxArea-2.0'. The constraint can be an equality or an inequality.