Abstract
When a gearbox is operated, the gearwheels are all subjected to in-plane oscillatory forces at the rim. The forces are induced due to the time varying stiffness during toothmesh and the imperfect profiles of the gearteeth. This paper is concerned with the mechanism of the vibrational power transmission due to these induced in-plane forces. The effects of a journal bearing on the vibrational power transmitted to the casing are also presented. The results show that the tangential excitation forces at the rim of a gearwheel transmit most of the power to the casing. The results also show that a journal bearing with a low eccentricity ratio reduces the power transmitted to the casing at low frequencies.
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