미세티끌 효과에 대한 마찰진동 연구

초록

In this study, the friction-induced vibration of the reciprocating device is measured under dust conditions and he dynamic instability mechanism using the analytical finite element model is proposed. In the case of absence of dust, a friction-induced vibration did not occur and the corresponding friction coefficient increased with the increase in revolutions per minute (r/min). In contrast, under the dust condition, a negative slope is developed, in which the friction coefficient decreases with increase in r/min. Consequently, the friction-induced vibration is generated. The results show that this system is excited by the negative slope mechanism, and the dynamics instability is predicted using the analytical finite element model. The numerical results show that the unstable frequency is due to dynamics instability caused by the bending mode of the frictional direction.

키워드