ABSTRACT
It may seem strange to think of deliberately vibrating a gearbox when an operating gear drive can be one of the most powerful vibration exciters that we have. The contrast between the excitation due to poor gears [which can easily give up to 10,000 N (1 Ton) pp at tooth frequency] and the 45 N (10 Ibf) from a typical small electromagnetic vibrator is rather extreme. There are several possible reasons for using an external forcing.
