Torsional vibration dynamics of a gear-shafting system attaching a nonlinear energy sink

Abstract

Torsional vibration of a gear-shafting system attaching a nonlinear energy sink (NES) is examined herein. Firstly, a gear-shafting system with two shafts is introduced and then dynamic model of the gear-shafting-NES system is established. Next, numerical simulations of gear-shafting-NES system on both the transient vibration and steady-state vibration are carried out. In the next part, the experimental verification of NES on the steady-state vibration suppression of the gear-shafting system is given. Incidentally, influences of the NES on the meshing frequency of gear pair are also studied. The results show that the steady-state vibration suppression rate of NES can reach 76.4% in simulation and 81.7% in test, and also the NES can inhibit the torsional vibration of the gear-shafting system even when it is not on the shaft of excitation source.