Define the Amplitudes

1. Click the Amplitudes tab.
   1. Select Show Graph of Force.
   2. Type 0 in the first row of the Frequency (Hz) column.
      • Press Enter twice.
      • Type 150 in the first row of the Force (lbf) column.
      • Press Enter.
   3. Type 30  in the second row of the Frequency (Hz)column
      • Press Enter twice.
      • Type 150 in the second row of the Force column.
      • Press Enter.
   4. Click OK to accept the frequency response setup.
2. Click OK to accept the analysis parameters.  

The force amplitude will be 150 lbf for all excitation frequencies.

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Parent topic: Truss Tower Frequency Response Analysis