A universal dynamical model of dual-chamber air springs with experimental validation

Abstract

Experimentally and theoretically, this paper combines thermodynamics, aerodynamics and structural dynamics to give a universal dynamical model of dual-chamber air springs, with physical meanings of each stiffness and damping term. An indicator experiment was designed to verify the theory proposed in this paper. The experimental results show that the dynamic stiffness model can well reflect the hysteresis characteristics and the variable stiffness characteristics of the dual-chamber air spring. It can also clearly reveal the frequency dependence of the dynamic stiffness. Finally, based on the derived model, the influence regulation of each parameter term on the dynamic stiffness amplitude and hysteresis phase angle is given numerically. The results show that each term can influence different dynamic characteristic of the dual-chamber air springs. The conclusions of this article can provide positive guidance for the vehicle dynamics matching and design of air springs.

Dynamic characteristic analysis and key parameter optimization of throttling orifice type air damping air spring

“…However, the effect of the change of the effective area of the air spring is not involved. Wu et al [12][13][14] combined aerodynamics and thermodynamics to model the hysteretic characteristic and stiffness characteristics of air springs, and provided clear physical meanings and accurate mathematical expressions for each part. The above researches focused primarily on the thermodynamic modeling of air springs and lacked relevant analyses of throttling elements.…”