No, Harmonic is a linear analysis, but you should run that before you spend time on a Transient Structural to get an estimate.
You should also get Modal results before you run a Transient so you know the frequency of the modes around the 30 Hz forcing frequency.
The rule for Transient Structural time steps is that the maximum time step should put 20 steps in the 30 Hz cycle. That means 600 steps/second or a time step of 0.00167 seconds.
You must add some Damping to the model. Is there a physical prototype to obtain some vibration data from?
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