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PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Characteristics Analysis of Air Spring with Connecting Pipe
H.X. Gao, M.R. Chi, M.H. Zhu, J. Zeng and P.B. Wu
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China
H.X. Gao, M.R. Chi, M.H. Zhu, J. Zeng, P.B. Wu, "Characteristics Analysis of Air Spring with Connecting Pipe", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 267, 2014. doi:10.4203/ccp.104.267
Keywords: air spring, physical parameters, dynamic model, dynamic stiffness, damping ratio, simulation, auxiliary reservoir, orifice, pipe.
An accurate dynamic model of an air spring with connecting pipe was set up using features of aerodynamics, fluid mechanics, engineering thermodynamics, etc. According to the established model, the dynamics characteristics of an air spring were calculated for different physical parameters. By comparison with experimental results, it shows that the simulation results of different physical parameters and experimental results coincide very well for dynamic stiffness and damping ratio; and the optimum diameter selection range of the orifice which must be added to the air spring system is 14mm to16mm; the best volume ratio of the auxiliary and bellows is 3.6; the length of pipe has no clear improvements in dynamics characteristic but the auxiliary reservoir should be installed as close as possible to the bellow if conditions permit; the small- diameter pipe, medium-sized pipe and large-diameter pipe are each subject to damping high-frequency excitation, low-frequency excitation and middle-frequency excitation.
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