Influence of Oil Bulk Modulus on Shock Absorber Characteristics

The oil bulk modulus influences the characteristics of shock absorbers. The modulus changes with the change of pressure and tamperature. In the literature, it is always assumed to be a constant. But there is no exploration. In the modeling, the bulk modulus is considered in this paper. And computer simulation is carried out for constant or changeable bulk modulus. For invalidation, simulation and experiments are compared. The simulation results are identical with the experiment results. The simulation time for constant is shorter than that for changeable one. This shows that constant bulk modulus is more suitable for sedation. According to the results of hydraulic control systems, Be = 7000 x 105 Pa is a suitable constant.