Taming disk and spindle rocking by damped laminated disks - An experimental study

The purpose of this paper is to demonstrate experimentally that increased d isk damping will reduce rocking motion of a rotating disk/spindle system. I n principle, rocking motion of the spindle is always coupled with one-nodal -diameter disk vibration modes. Therefore, increase of disk damping could r educe spindle rocking motion. To prove the concept, damped laminated disks were used in experiments to increase disk damping. Frequency response funct ions of the disk/spindle system were measured from 0 to 7200 rpm for regula r disks and damped laminated disks. Experimental results show that the damp ed laminated disks increase the damping of the first and second pair of roc king modes by a factor of 4 and 2, respectively. The experimental results a gree with previous theoretical predictions qualitatively [1].