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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

1. Assigning Material to a Component

Now we can assign 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.

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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 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 together, instead they are bolted to the four supports.  Modeling these connections can be achieved in two steps.

First, right click Connections > Create Automatic Connections.  This creates a bonded connection between all parts that touch each other.

Go to Step 3 - Mesh
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