Abstract:
For a membrane air spring, a finite element model was established by nonlinear finite element software ABAQUS. By simulating the static test of the air spring, the static stiffness curve of the air spring under a given displacement and a certain initial pressure were obtained. The physical parameters of the air spring were changed, and the influence of the initial pressure, the angle of the cord reinforcement layer, the distance between the layers on the vertical static characteristics of the air spring were analyzed. Finally, the dynamic stiffness model was established to study the impact of the vibration frequency on the dynamic stiffness. The calculation results showed that the change of the cord layer angle and the cord layer distance of the membrane air spring have corresponding effects on the static stiffness of the membrane air spring. The dynamic stiffness of the air spring will also be changed at different frequencies to adapt to different working conditions. Our findings can provide a reference for the matching of air spring and vehicle suspension system.