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Before applying a specific density to this component, we must create a new material with a given density. This is done through Engineering Data on the Ansys Workbench. It is important to note that we will only be changing the density of the material, as other material properties have little to no effect on the resonant frequency of the satellite. We will simply duplicate the Al 6061-T6 and change the density. Right click on Al 6061-T6 , >Duplicate. Duplicate three times, then rename the new materials Large Box, Small Box, and Cylinder.
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Now assign the small box material to "Small Box 1" and the cylinder material to "Cylinder". The internal components will now simulate a more realistic mass rather than a solid piece of aluminum.
2. Geometry Connections
While in the Design Modeler, right click Connections > Contacts to view all of the contacts between two parts. To To simplify the model, we assume that most of the structure is rigid and bonded together. However, for our model we will assume that none of the satellite walls are bonded togetherto each other, instead they are bolted to the four supports. Modeling these connections can be achieved in two a few steps.
First, right right click Connections > Create Automatic Connections. This creates a bonded connection between all parts that touch each other.
Now maximize the Connections tab, right click Contacts > Rename Based on Definition. You can now see the connection type and the names of the parts that are bonded to each other.
Because the walls are not physically bonded to each other, we must suppress every wall-to-wall connection. While holding the Ctrl key, select every wall-to-wall connection. There should be 12 wall-to-wall connections. Right click the selection > Supress. 