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VisualAnalysis Tutorials: Generating Copies

Project Description:

Up to this point in using the tutorials you have become familiar with generating copies in a rectangular pattern. This tutorial is aimed at teaching you how to generate copies in a circular pattern.

This tutorial was created using a prior version of VisualAnalysis. Minor changes to the software may have occurred including new features and graphics updates. The appearance of dialog boxes and the Project Manager may be altered slightly. () or the User's Guide () if steps do not appear correct.

Modeling the Structure

Begin by creating a new blank Plane Truss. Title the project "Plane Truss". Draw the first half of the truss; your model should be similar to the figure below:

The next step is to create a mirror image copy of the truss. In order to do this, we must make this Plane Truss a Space Truss; using the Modify tab.

Now, highlight all of the members by holding down shift and selecting one member. Use the Model | Generate Copies command to make the copies. Select "Using a circular pattern", click Next. Rotate the model parallel to the Y axis about the rightmost point of the sketch. Click Next.

Make "1" copy with Spacing between copies of "180 deg". Click Finish. Your model should look similar to the figure below.

Turn on the local axes for the members under the Member Details of the Filter Tab. Notice that the newly copied member's local axes are opposite that of the original members. Depending on how you drew the original members, some of the copied members may need to have their local axes reversed. To do this, use the Model | Reverse Local Axes command. The orientation of the local axes may or may not be a concern, depending on the application. If you are going to load the truss using Global Axes and you are not concerned with local axes specific results, reversing the local axes is probably not needed.

Now switch the structure type back to a plane truss and select the two end nodes to make them pinned supports. Your model is now ready to be loaded, and should look similar to the model below:

Note: This truss could have also been generated using the Model | Generate Standard command.