抄録
A model for analysing the quasi-static and dynamic behaviour of double helical gears is presented. It accounts for time-varying non-linear mesh stiffnesses, gear and pinion distortions, shape modifications and floating parts. The equations of motion are solved step-by-step in time and normal contact conditions are included in the numerical process. The interest of a floating pinion for equalizing quasi-static and dynamic tooth loads on the two halves is pointed out. It is also shown that tooth stagger between the two helices can significantly reduce the variations of quasi-static transmission error under load. Results at higher speeds reveal that dynamic amplifications are lower but, in the same time, critical tooth frequencies are shifted. It is therefore concluded that, depending on the operating speeds, staggering of the teeth is not necessarily beneficial.
