Using the following formulas, you can determine how much vibration will be sufficient. Remember, the goal is to provide just enough vibration to do the job.
Excessive vibration can cause excessive wear on surrounding systems.
Vibrators with their axes in the same plane and wired to contra-rotate will produce a linear motion at right angles to the vibrator axes. Amplitudes are given by the formulas below. True circular motion is only obtained when the center of the vibrator coincides with the center of gravity of the structure. When vibrators are fixed in noncenter of gravity positions, the motion will be in the form of an ellipse which varies at different points on the structure. Amplitudes given by the formulas below are an average value suitable as an approximation.