Title: Running stability simulation and field testing of two-axle bogie design

Authors: You-Min Huang, Tsung-Shou Wang

Addresses: Department of Mechanical Engineering, National Taiwan, University of Science and Technology, 43 Keelung Road., Section 4, Taipei, 10672 Taiwan. EMU Site Office, SEMPO, Department of Rapid Transit System, Taipei Municipal Government, Taipei, Taiwan

Abstract: Running stability, which limits the maximum safe operating speed of the EMU (Electrical Multiple Unit), largely relies on longitudinal suspension stiffness. However, the longitudinal suspension impairs the steering ability of the rigid railway wheel-sets having conical or profiled-wheel treads on curved track. This limitation is felt particularly in EMUs designed for high operating speeds. This study utilises the multi-body program MEDYNA to explore the running stability of a two-axle bogie design through simulation. Considered herein are the relation of critical speed and conicity, also the damping ratio through 2D and 3D analyses. Field test results are examined to find the lateral displacement of the wheel and the bogie swing angle in order to determine running stability. Hence, the design prediction and field test confirmation of running stability behaviour are studied to further understand one of the most fundamental factors to be considered in the design and engineering development of a bogie.

Keywords: two-axle bogie; stability simulation; field testing.

DOI: 10.1504/IJVD.2001.001934

International Journal of Vehicle Design, 2001 Vol.26 No.2/3, pp.131-145

Published online: 14 Dec 2003 *

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