By default, the Optimization module uses the data from the last load case, if any, and the last step of your Abaqus model to define the design response. Alternatively, if your model contains multiple steps or load conditions, you can select which steps or load conditions will be used to define the design response. Finally, if you have multiple models open in your session, you can select which models and which steps or load conditions within each model will be used to define the design response.
In addition, if the design response is calculating an eigenfrequency, you can choose which mode or range of modes to examine.
To select the data source of a design response:
From the Create Design Response dialog box, select the Steps tabbed page.
Do either of the following:
Select Use last step and last load case to define the design response using data from the last step or last load case.
Select Specify to select the step or load condition that will be used to define the design response.
If you selected Specify, do the following to select the models, steps or load cases (within a step) that will be used to define the design response.
Select 
to add a step from the current model to the list of steps.
Select 
to add all of the valid steps from the current model to the list of steps.
Select 
to add all of the valid steps from all of the open models in your session to the list of steps. (Abaqus/CAE displays an asterisk next to the name of the current model.)
Select 
to delete a step from the list of steps.
If desired, click on a cell in the table, and select an alternate model, step, or load case from the menu that appears.
If the design response will calculate an eigenfrequency, you can select a mode or a range of modes from which the eigenfrequency will be calculated.
If the design region is a shell, you can select the location in the shell section from which the Optimization module will calculate the shell stresses. You can choose from the following:
The value of the shell stress at the top, middle, or bottom layer of the shell. (The middle layer experiences no bending and behaves as a membrane.)
The maximum value of the shell stress from the top, middle, or bottom layer of the shell.
The minimum value of the shell stress from the top, middle, or bottom layer of the shell.
Select how the Optimization module will extract the design response from the selected region. You can choose from the following:
The maximum value from the selected region.
The minimum value from the selected region.
The sum of the values from the selected region.
Select how the Optimization module will extract the design response from the steps and load cases. You can choose from the following:
The maximum value from all the selected steps and load cases.
The minimum value from all of the selected steps and load cases.
The sum of the values from all of the selected steps and load cases.
Click OK to save your data and to exit the editor.
