Goal

Use the Goal area of the Optimization Study Definition dialog box to select a measure to minimize or maximize as the goal of the optimization. For example, you might want to minimize mass or reaction forces for your model. When defining a goal, you cannot select a measure unless you have defined an analysis for which that measure is valid. However, you can select a measure associated with different analyses.

Defining a goal is optional, but if you do not define a goal, you must define design limits. Without a goal, Creo Simulate searches for the first feasible design that satisfies the limits you define.

The Goal area of the dialog box includes a Goal drop-down list that you use to indicate the goal and a Measure button that enables you to select the measure that you want to use as the basis for the goal.

The Goal option menu provides these selections:

• Minimize—Creo Simulate tries to make the goal measure as small as possible. If the measure can move into the negative numbers, Creo Simulate will try to make the goal as negative as possible.

• Maximize—Creo Simulate tries to make the goal measure as positive as possible.

• Minimize Absolute Value—Creo Simulate tries to minimize the absolute value of the goal measure, getting it as close to zero as possible, regardless of sign.

• Maximize Absolute Value—Creo Simulate tries to maximize the absolute value of the goal measure, getting it as far from zero as possible, regardless of sign.

Note that the Minimize and Maximize options take into account the sign of the goal measure's value, while the Minimize Absolute Value and Maximize Absolute Value options do not.

Clicking Measure opens the Measures dialog box. After you select a measure and exit the Measures dialog box, Creo Simulate displays the name of the selected measure in the Optimization Study Definition dialog box. Creo Simulate also displays an analysis name, except for measures like total_cost and total_mass that are calculated for all analyses. In case of multiple analyses you can use the Analysis drop-down list to indicate the analysis you want the optimization study to run.

Depending on the analysis type you select, you may have the option of selecting specific load sets or modes. If you select a modal and prestress modal analysis, you also have the option of enabling mode tracking.