tutr dx whatif

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DesignXplorer 14.0: Performing a Parametric What If Study

This tutorial gives step-by-step instructions for performing a parametric What If? study of a hitch re-ceiver. The workshop uses the Parameter Managerto investigate the behavior of stress, mass, and

deformation in the receiver as the geometry parameters are changed during vertical loading.

Note

What If? studies use functionality inherent to ANSYS Workbench. A DesignXplorer license

is not required to complete this workshop.

This tutorial covers the following sections:

1. Getting Started

2. Promoting Input and Output Parameters3.Working with Design Points in Workbench

4.Working with Parameters Charts in DesignXplorer

5.Viewing the Solution

1. Getting Started

Model Description

The model is composed of a multibody part (three bodies) created in DesignModeler. Constraints and

loads are shown below.

The dimensions labeled 1,2, and 3, shown below, will be promoted to input parameters.

1Release 14.0 - SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationof ANSYS, Inc. and its subsidiaries and affiliates.


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Restoring the Archived the Project

1. Open ANSYS Workbench 14.0 and select File > Restore Archive from the main menu.

2. In the file browser, locate and open the file receiver.wbpz.

3. Save the project as reciever.wbpj.

Release 14.0 - SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationof ANSYS, Inc. and its subsidiaries and affiliates.2



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2. Promoting Input and Output Parameters

Promoting Input Parameters in DesignModeler

1. On the Project Schematic, double-click the Geometrycell. Alternatively, you can right-click the Geo-

metrycell and select Edit from the context menu.

2. In DesignModeler, select Gusset in the Tree Outline.

3. In the Details View, select the parameter box next to FD1, Depth.

4. Set Parameter Name to thick_dsand click OK.

5. In the Tree Outline, expand YZPlaneand select Sketch4.


Promoting Input and Output Parameters


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6. In the Details View, select the parameter box next to H6.

7. Set Parameter Name to horiz_dsand click OK.

8. Leave Sketch4under the YZPlane in the Tree Outlineselected.

9. In the Details View, now select the parameter box next to V7.

10. Set Parameter Name to vert_dsand click OK.




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11. Return to the Project Schematic. Note that the Parameter Setbar has been added. An arrow leaves

the Parameter Setbar and connects to cell A8 Parameters, indicating that input parameters have

been defined.

Promoting Output Parameters in Mechanical

1. On the Project Schematic, double-click the Setupcell. Alternatively, you can right-click the Setupce

and select Edit from the context menu.




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2. In DesignModeler Outline, select Geometry.

3. In Details of Geometry, expand Propertiesand select the parameter box next to Mass. This promotes

mass to an output parameter.

4. In the Outline view, expand Solutionand select Equivalent Stress.




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5. In the Details of Equivalent Stress view, expand Resultsand select the parameter box next to Max-

imum. This promotes the maximum equivalent stress to an output parameter.

6. In the Outlineview under Solution, select Total Deformation.

7. In the Details of Total Deformation view, expand Resultsand select the parameter box next to

Maximum. This promotes the maximum total deformation to an output parameter.




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8. Return to the Project Schematic. Note that an arrow now leaves cell A8 Parametersand connects to

the Parameter Setbar, indicating that output parameters have been defined.




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3.Working with Design Points in Workbench

Adding and Updating Design Points

1. On the Project Schematic, double-click the Parameter Setbar. Alternatively, you can right-click the

Parameter Setbar and select Edit from the context menu.

2. In the Parameter workspace, add the three design points shown below to the Table of Design Points

3. Click the Update All Design Pointsbutton.

4. Click the Show Progressbutton in the Status Bar at the bottom right corner of the workspace. TheProgress Barshows the progress of the update.

When the update is complete, the Table of Design Pointsdisplays the results.


Working with Design Points in Workbench


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4.Working with Parameters Charts in DesignXplorer

Working with Charts

Note

The Chartsview may not be displayed by default. If you do not see the Chartsview at the

bottom right of the workspace, select View > Outline from the main menu.

First, well add a chart that illustrates the relationship between a selected output parameter and each

of the design points.




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1. In the Outline of All Parametersview, under Output Parameters selectP6. Note that there are no

charts in the Chartsection at the bottom of the view.

2. In the Toolbox, expand Parameter Charts and double-click Design Point vs ? to add a chart.

3. Select the newly added Parameter Chart 0.

4. In the Properties of Outlineview, set the Y-Axis (Left) property to P6 Total Deformation Maximu


Working with Parameters Charts in DesignXplore


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The Parameter Chart 0displays in the Chartview. Note that the design points are arranged along

the bottom of the X-axis and the P6 values are on the Y-axis on the left side of the chart, as spe-

cified in the Propertiesview.




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Note

An alternate method of viewing this chart is to select the parameter P6and then double-

click on the Parameters Chart P6 vs ?option in the Toolbox.

Next, well add a chart that illustrates the relationship between a selected output parameter and each

of the design points.

1. Select any cell in the IDcolumn of the Outline of All Parametersview.

2. In the Toolbox, double-click Parameters Parallel Chart (All) to add the chart.

3. Select the newly added Parameters Parallel Chart 0.


Working with Parameters Charts in DesignXplore


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The Parameters Parallel Chart 0displays in the Chartview. Note that all the parameters are ar-

ranged along the bottom of the X-axis. The top and bottom values indicate the range relative to

each parameter. Each color-coded line on the plot represents a design point.

5.Viewing the Solution

Viewing the Solution

A solution is generated for the design point designated as Current in the Table of Design Points. If,

based on your design exploration, you decide that another design point is preferable, you can define

that design point as Current.




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1. In the Table of Design Points, right-click on the design point you want to designate as Currentand

select Copy inputs to Currentfrom the context menu. Note how the values in the Currentrow chan

accordingly.

2. Right-click on the Current row and select Update Selected Design Points from the context menu.

When the update is complete, the Table of Design Pointsdisplays the results.

3. Click the Return to Projectbutton to return to the Project Schematic.

4. On the Project Schematic, double-click the Modelcell. Alternatively, you can right-click the Model

cell and select Edit from the context menu.

5. In Mechanical, under the Solutionbranch of the Outlineview, select an output to view the solution

for the Currentdesign point.


Viewing the Solution


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