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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 98
PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 79

A Dynamic Study of a High Speed Electric Multiple Unit Based on a Flexible Car Body

P.B. Wu1, Y.L. Shan2, H.C. Wu1 and J. Zeng1

1State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, P.R. China
2CSR Qingdao Sifang Locomotive & RollingStock Co., Ltd., Qingdao, China

Full Bibliographic Reference for this paper
P.B. Wu, Y.L. Shan, H.C. Wu, J. Zeng, "A Dynamic Study of a High Speed Electric Multiple Unit Based on a Flexible Car Body", in J. Pombo, (Editor), "Proceedings of the First International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 79, 2012. doi:10.4203/ccp.98.79
Keywords: electric multiple unit, flexible car body, modal test, response.

Summary
The development of the high speed electric multiple unit (EMU) has achieved much attention in China. In order to lighten the high speed EMU, stainless steel and aluminum alloy have been widely used in the structure of the car body. However a lightened car body causes a reduction of stiffness in the structure, lowers the natural frequencies, and easily leads to resonance vibration. The aggravated vibration of the car body seriously affects the ride comfort of passengers. It is an effective way to consider the elastic deformation effect of the structure in the vehicle systems dynamic analysis. In this paper, a multi-body system dynamic model is developed the structure of which includes an elastic deformation behaviour. Dynamic simulation of the high speed railway passenger car is carried out using this model. The influence of the elastic vibration of the car body imposed on the under-car equipment is studied. The numerical simulation results for the EMU car are validated using a roller rig test.

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