Define the Excited Nodes

Next, we must specify the nodes to which the forces will be applied.

1. Click the Excited Nodes tab.
   • Select Node Number of Applied Excitation and type the first previously recorded node number into the adjacent field.
   • Select Force Input.
   • Type 1 in the Scaling Factor for Amplitudes field.
2. Click New to create a new node set.
   • Type 2  in the Excited Nodes Set ID dialog box and click OK.
   • Click Yes to save the changes.
   • Type the second previously recorded number into the Node Number of Applied Excitation field.
3. Click New to create a new node set.
   • Type 3 in the Excited Nodes Set ID dialog box and click OK.
   • Click Yes to save the changes.
   • Type the third previously recorded number into the Node Number of Applied Excitation field.
4. Click New to create a new node set.
   • Type 4  in the Excited Nodes Set ID dialog box and click OK.
   • Click Yes to save the changes.
   • Type the fourth previously recorded number into the Node Number of Applied Excitation field.  

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Parent topic: Truss Tower Frequency Response Analysis