Abstract: A mechanic model of circular elastic supporting slices was established under partial load， and the influential law of slices deformation was discussed. The exclusive testing machine was used to study its damping characteristics， which was then compared and verified with that of the theoretically deduced results. The influence of different key parameters on the damping characteristics of shock absorbers was studied. The results showed that with the increase of spring stiffness and slices thickness， the damper force of rebound stroke of shock absorber increases， and the greater the speed， the big increase in damping force. The area of pressure acting on the circular slices also has a significant influence on the damping force， so it is recommended that this parameter should be examined during the design phase of the shock absorber to extend the product performance interval. The results may provide reliable and accurate theoretical reference for the design of twin-tube hydraulic shock absorber with elastic supporting slices.

Key words: shock absorber, damping characteristics, partial load, elastic supporting, slice deformation