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Drag and drop the geometry box onto 
If
We can now survey the imported geometry by double clicking 
The internal components of this satellite have been simplified to reduce modal analysis run time. While this CubeSat structure is simple, larger satellites often have a more complex interior with a wide array of components and structural stiffeners. Features such as small extrusions, fillets not in contact with the frame and holes may be omitted to reduce the computational load of the simulation.
In order to simulate the mass of the internal components, we must apply a specific density to each component based on its corresponding volume. The volume of each component can be found by clicking on the desired part under Geometry in the Design Modeler and opening up the Properties tab in the details window.
In the image below, you can see the volume for "Large Box 1".
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.
For the purposes of this tutorial, the densities for the components are provided (make sure the correct unit kg/m^3 is selected):
Large Box Density = 1000 kg/m^3
Small Box Density = 900 kg/m^3
Cylinder Density = 1200 kg/m^3
Now we can apply the new material densities to the internal components. Left click Return to Project > Model to return to the Design Modeler. Now open up the Geometry drop down list and select "Large Box 1" and "Large Box 2". Right click Material > Assignment > Large Box.
