STOP


ID_NAME	= <`id_name_of_stop_condition`>	Name of the `STOP` condition.
LOGICAL	= <`name_of_logical_variable`>	Name of a logical variable.
ITER_MAX	= <`value`> = 50 (size/topo sens) = 50 (shape controller/sens) = 15 (topo controller) = 20 (bead sens) = 3 (bead controller)	Maximum number of iterations. For sensitivity-based topology and sizing optimization, the default value is 80 iterations when nonlinear material or stress design responses are present in the optimization
The following parameters are available only in combination as `Logical Condition`:
MOD_NDGR	= <`name_of_node_group`>	Node group for which the comparison is made.
MOD_TYPE	<`mod_type_1`>, <`mod_type_2`>	The parameter <`mod_type_1`> of the variable specified in the second parameter <`mod_type_2`> is compared to `MOD_REF` using the operator specified in `MOD_OPER`.
<mod_type_1>	= MAX
	= MIN
	= SUM
	= COUNT
<mod_type_2>	= MOVE	Amount of optimization displacement.
	= MOVE_GROWTH	Like `MOVE`, but only positive.
	= MOVE_SHRINK	Like `MOVE`, but only negative.
	= MOVE_TOTAL	Optimization displacement referring to initial model.
	= MOVE_GROWTH_TOTAL	Like `MOVE_TOTAL`, but only positive.
	= MOVE_SHRINK_TOTAL	Like `MOVE_TOTAL`, but only negative.
	= CTRL_INP	Controller input value (equivalent stress).
	= CTRL_INP_SHAPE	`CTRL_INP` of design nodes.
	= CTRL_INP_SHAPE_FIX	`CTRL_INP` of restricted design nodes.
	= CTRL_INP_SHAPE_FREE	`CTRL_INP` of free design nodes.
	= CTRL_INP_SURFACE	`CTRL_INP` of surface nodes.
MOD_OPER		Comparison operator.
	=LT	Less than.
	= LE	Less or equal.
	= EQ	Equal.
	= GE	Greater or equal.
	= GT	Greater than.
MOD_REF	= <`real`>, <`mod_ref_1`>, <`mod_ref_2`>	The real value is linked with the <`mod_ref_2`> specified iteration in the way described by <`mod_ref_1`>.
<mod_ref_1>	= MULT	Multiplication.
	= ADD	Sum.
	= SUB	Subtraction
	= DIV	Division.
<mod_ref_2>	= PREV	Previous (iteration).
	= FIRST	First (iteration).
OPTIMIZE	= <`name_of_optimization`>	Name of the optimization task.

Remarks

Using the parameter ITER_MAX a global stop condition can be set. In the optimization system, a number of 40 iterations is set by default.
If a global STOP condition is defined, no other parameters can be defined in the STOP command. If an additional logical STOP condition must be defined, another STOP definition must be defined.

Examples

The optimization should stop, when the maximum equivalent stress of the node group all_nodes is smaller than 1% of the maximum equivalent stress of the first iteration:

STOP
  ID_NAME  = stop_command
  MOD_NDGR = ALL_NODES
  MOD_TYPE = MAX, CTRL_INP_SHAPE
  MOD_OPER = LE
  MOD_REF  = 0.01, MULT, FIRST
  OPTIMIZE = run
END_

The optimization should stop when the equivalent maximum von Mises stress in the design area is smaller than 200 MPa.

VARIABLE
  ID_NAME    = var_sig
  DEF_TYPE   = SYSTEM
  TYPE       = SIG_MISES
  ND_GROUP   = design_nodes
  GROUP_OPER = MAX
END_

LOGICAL
  ID_NAME  = logi_1
  DEF_TYPE = BASE
  OPER     = LT
  VAR_A    = var_sig
  FIX_VAL  = 200
END_

STOP
  ID_NAME  = my_stop_condition
  LOGICAL  = logi_1
  OPTIMIZE = my_optimization_problem
END_