Abstract: The gas-precharged dual-sleeve shock absorber with multiple valve plates of a passenger car is submitted to study. A mathematical model which includes all kinds of cases is built based on the working principle of the shock absorber, A detailed simulation sketch model is built using the multi-domain system simulation software-AMESim based on the mathematical model of the given shock absorber. According to the equivalent thickness formula of superposition throttle-slices, a finite element method model of the multiple valve plates in the shock absorber is built using Abaqus considering the non-liner features in the deformation of the valve plates. The deformation curve with varied force applied on the valve plates is acquired in abaqus. Further, an advanced simulation model focusing on the entire shock absorber system is built in AMESim using the data gathered in the previous simulation in Abaqus. The simulation indicates that the velocity performance curve and the indicator diagram acquired from the model fit well compared with those from the testing data, and the simulation model is considered to be correct and meets actual requirements. In the last part, the affection on the performance of the shock absorber caused by gas resilience, piston aperture and liquid-filled piping is studied, and several important conclusions are reached. The simulation model can be used as a performance forecast and key parameters design of the shock absorber.

Key words: AMESim, Damping features, Gas resilience, Multiple valve plates, Shock absorber