기어 물림부의 스프링강성 변화와 구동기의 불균형을 고려한 2단 기어장치의 진동에 관한 연구

Abstract

We develop a method to analyze dynamic behavior of a multi-stage gear train system. The example system consists of three shafts supported by ball bearings at the ends of them and two pairs of spur gear set. For exact analysis, the meshing tooth pair of gear set is modeled as spring and damper having time-dependent meshing stiffness and damping. The bearing is modeled as spring. The result of this analysis is compared to that of other model having mean mesh stiffiiess. The effect of the excitation force by the imbalance of a rotor of a motor is also analyzed. Finally, the change of a natural frequency of the whole system due to the change of an angle between three shafts is compared in each case, and from this analysis, the avoiding angle for design is advised.