Abstract
When we operate a transmission under light load conditions, the contact pattern of the gear pair does not cover the entire tooth surface and the vibratory response varies with transmitting load. To obtain a detailed description of the rotational vibratory response of a helical gear pair having tooth surface deviation during light load transmission, we have already developed a numerical calculation method for gear vibration which can take any type of deviation into account. In this paper, we show the 'performance diagram' for several types of tooth profile deviation and several load conditions. The perfomance diagram indicates the acceleration level using contour lines on the contact ratio plane formed by the transverse contact ratio (abscissa) and the overlap ratio (ordinate). With these diagrams, the vibratory characteristics of each type of tooth profile under light load conditions become clear. The optimal and worst gear parameters are discussed.
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