驻波振动下阻尼环径向运动阻尼比计算方法

The damping capability of the blisk structure is relatively low，which incrsasing its risk of high-cycle fatigue failure. A common solution to enhance structural damping is installing a ring damper. This study focused on the damping mechanism of the radial motion component of a blisk with ring damper under nodal diameter standing wave vibration conditions. An improved analytical method for calculating the damping ratio was presented，which could more precisely identify the slip and stick regions，thereby calculating frictional energy dissipation. By representing the ring damper as a rod element，an 1D finite element method was introduced. The improvement made on the analytical method was validated and the damping ratio calculation process was simplified. Based on the above methods，the damping ratio provided by the ring damper was calculated using the energy method and applied to a blisk example with ring damper. The consistency of the results between the improved analytical method and the 1D finite element method was confirmed，as well the mesh independence of the latter. The analysis indicates that the 1D finite element method proposed in this paper surpasses the analytical method in terms of universality and offers potential for considering the effect of the superposition of multiple nodal diameter displacement on damping.