Experimental Research on the Mechanical Damping Characteristics of Automotive Hydraulic Shock Absorber

In this paper the experimental research on the damping characteristics of a twin-tube shock absorber is presented. The damping force of the shock absorber was measured when it was excited with both sine wave and stochastic wave displacement, which were applied under different shock absorber temperature. And based on the data processing both in amplitude domain and frequency domain, the damping characteristics of the shock absorber were carefully and objectively evaluated. And the effects of the load method and operation temperature on the damping characteristics, its nonlinear and time-variable characteristics and its force transfer-function were also discussed. From this work, a more scientific and accurate evaluation method of the shock absorber method was established, and the measures data will be very helpful for the to-be-done theoretic investigation into the thermo-dynamical characteristics, and for the establishment of a time-variable, nonlinear shock absorber damping model with hysteresis effect.