关键词: 振动与波, 动力吸振器, 轴系纵振, 有限元, 磁流变弹性体

Abstract: Given the longitudinal vibration of ship propulsion shafting, the dynamic model of longitudinal vibration of Propeller-Shafting is established, and its first three modal shapes are derived in this paper. At the same time, the finite element modal of the shafting has been established, the calculated results and the analytical solution were compared. In this paper, a method of using the dynamic absorber to suppress the longitudinal vibration of the ship shafting was put forward. By simulating the longitudinal vibration of the shafting under the actual speed of ship, it is evident that the actual vibration is very close to the first modal, so it is used to approximate the response of the shafting. After assembled absorber, the dynamic differential equation was established and the response was deduced. Then, an idea was conceived that using magnetorheological elastomer to manufacture broadband dynamic vibration absorber, and a simple conceptual design was introduced. A new method of suppressing the shafting vibration is introduced in this paper.