Dynamics Modeling and Simulation Analysis of a Gas-hydraulic Buffer Based on AMESim

Abstract

Previous studies on train crash behaviour have focused on the entire train buffer system, and few studies have focused on the internal structure and dynamic characteristics of the gas-hydraulic buffer in the buffer device. In this paper accurate three-dimensional and dynamic models of a gas-hydraulic shock absorber are constructed, and a simulation model of the gas-hydraulic shock absorber is established using the AMESim software platform. Based on this model, the influence of the structural parameters of the gas-hydraulic buffer and the parameters of the internal working medium on its dynamic characteristics is studied, which provides a reference for the practical application, development and optimization of gas-hydraulic buffers in the future. Compared with the impedance force-travel data curve of an impact trolley crash test at different speeds, it is proven that the model can simulate the dynamic characteristics of the gas-hydraulic buffer in the collision process. Key words: Gas-hydraulic buffer; Dynamic characteristics; Structural parameters; Working medium; Simulation analysis