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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 255

Study on Pipe Modelling of an Air Spring in Railway Vehicles

M.R. Chi, H.X. Gao, M.H. Zhu, J. Zeng and P.B. Wu

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China

Full Bibliographic Reference for this paper
M.R. Chi, H.X. Gao, M.H. Zhu, J. Zeng, P.B. Wu, "Study on Pipe Modelling of an Air Spring in Railway Vehicles", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 255, 2014. doi:10.4203/ccp.104.255
Keywords: air spring, pipe modelling, inertia effect, length, diameter, orifice, dynamic stiffness, damping.

Summary
This paper presents a new approach of pipe modelling. Focusing on the air spring secondary suspension, equipped with an orifice or not, the dynamic characteristics are calculated for different pipe lengths and diameters. By comparison with experiment results, it shows good agreement between the proposed pipe model and the test results; indicating this new pipe model can be used for simulation of secondary suspension behaviours. The inertia effect of the connecting pipe is critical for all amplitudes if no orifice existed. For the air spring system with orifice damping, the inertia effect of pipe mass is not significant for large amplitudes but this cannot be ignored for small amplitudes. The pipe length and diameter have a great influence on dynamic stiffness and damping.

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