Location: Analysis page – Optimization panel (OptiStruct user profile)
Use the Free Size panel to define design domains for free size optimization.
For more information on free size design variables, see DSIZE in the OptiStruct online help.
Subpanels and Inputs
The Free Size panel contains the following subpanels and command buttons:
Panel Inputs
Input
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Action
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desvar
|
Name for the design variable
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type
|
Entity type
|
props
|
Select the property.
|
minimum thickness
|
Specify a non-zero value for the minimum shell (for PSHELL) or set global TMINPLY for PCOMP and PCOMPG.
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maximum thickness
|
Specify a maximum thickness other than the shell (for PSHELL) or set global TMINPLY for PCOMP and PCOMPG thickness defined on the property card.
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Panel Inputs
Input
|
Action
|
desvar
|
Name for the design variable
|
type
|
Entity type
|
props
|
Select the property.
|
minimum thickness
|
Enter the minimum thickness or select zero to be the minimum.
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maximum thickness
|
Choose to use the thickness value from the selected property, or enter a thickness value.
|
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Panel Inputs
Input
|
Action
|
desvar
|
Name for the design variable
|
minmemb off / mindim =
|
Enter a value for the member size control, or toggle the switch to off.
|
stress constraint
|
Enter a value for the stress constraint, or toggle the switch to none.
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fatigue constraint
|
Enter a value for the fatigue constraint, or toggle the switch to none.
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For more information on member size control, see Member Size Control for Free Size Optimization in the OptiStruct online help.
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Panel Inputs
Input
|
Action
|
desvar
|
Select the DSIZE design variable.
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laminate thickness: min thickness /off
|
Enter a value for the laminate thickness (LAMTHK) minimum, or toggle the switch off.
|
laminate thickness: max thickness /off
|
Enter a value for the laminate thickness (LAMTHK) maximum, or toggle the switch off.
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ply thickness: no. of constraints
|
Displays the number of constraints for ply thickness (PLYTHK). To modify this number, click Edit.
|
ply percentage: no. of constraints
|
Displays the number of constraints for ply thickness percentage (PLYPCT). To modify this number, click Edit.
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ply manufacture: no. of constraints
|
Displays the number of constraints for manufacturable ply thickness (PLYMAN). To modify this number, click Edit.
|
balance: no. of constraints
|
Displays the number of constraints for balancing (BALANCE). To modify this number, click Edit.
|
constant: no. of constraints
|
Displays the number of constraints for constant thickness (CONST). To modify this number, click Edit.
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ply drop-off: no. of constraints
|
Displays the number of constraints for ply drop-off (PLYDRP). To modify this number, click Edit.
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Panel Inputs
Input
|
Action
|
desvar
|
Name for the design variable
|
pattern type
|
Select the pattern type.
|
second node
|
Used for 2-plns sym or 3-plns sym types.
|
ucyc
|
The number of repetitions in 360 degrees. Used for cyclic or cyc 1-pln types.
|
|
Panel Inputs
Input
|
Action
|
desvar
|
Name for the design variable
|
master / slave / none
|
Determine whether you are establishing a master coordinate system, a slave design variable, or neither.
|
system /coordinates
|
Choose to manually enter the values for the coordinate system, or to graphically select the system.
|
global system / local system
|
Reference coordinate system
|
anchor
|
Select the anchor node.
|
sx /sy /sz
|
x, y and z scale factors.
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Panel Inputs
Input
|
Action
|
desvar
|
Select the DSIZE design variable.
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zone definition sets
|
Select sets for zone based (GROUP) free-sizing optimization.
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The following action buttons appear throughout the subpanels:
Button
|
Action
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create
|
Create the design variable.
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edit
|
Open the property collector panel to edit the property.
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reject
|
Revert the most recent changes.
|
review
|
Review the load in the graphic area.
|
update
|
Update the load with the most recent changes.
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return
|
Exit the panel.
|
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See Also:
Free Size Optimization in the OptiStruct online help
