Fundamental Research on Gear Noise and Vibration : 7th Report, Generation Mechanism of Radial and Axial Vibration of Spur Gears-II

Abstract

In this report, various kinds of vibrations of a gearing, including those of bearings, are examined closely on their phase-relationship, vibrational mode and frequency spectrum, whose results are compared with the calculated ones based on the theory in the 6th report. Results obtained are as follows : The theory is useful not only for behaviours and the vibrational mode of the circumferential vibration and the radial one in spur gears but also for the vibrational mode of bearings, although the calculated value for the conversion ratio to radial vibration is a little smaller than the experimental one mainly because of the frequency characteristics of bearings being neglected. Regarding the generation mechanism of the axial vibration of spurgears, the vibration of a gear body as an elastic circular disc, which was not considered in the theory, can be predominant by a resonance under some definite condition.