Simulate the force of gravity as it affects your model.
        Only one gravity load can be applied to a model. Gravity load acts on all
            unsuppressed parts of the model.
        - 
                On the Project Tree, open
                    the Analysis Workbench.
            
 
- 
                In the workbench toolbar, click the 
 (Gravity load) icon.
             
- 
                In the dialog, specify directional components of the load in the X, Y, and Z
                    fields.
                
                    Note: Enter negative values to specify gravitational forces that oppose the
                        coordinate direction.
                 
             
- 
                Specify amplification factor for the gravity load magnitude.
                
                    Note: The default  magnitude is specified as a ratio of 1G gravitational
                        load.
                 
             
- 
                Click OK.