Title: Two-axle bogie design for electrical multiple unit. Part 2: Bogie frame fatigue test

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 106, Taiwan.

Abstract: The present article describes the bogie fatigue strength test. The bogie fatigue strength test was conducted on an unpainted bogie frame to verify compliance with the FEM analysis of bogie design. According to the bogie static strength test, we can compare the measured stress from the bogie fatigue strength test with the calculated stress values of the FEM analysis. The bogie fatigue strength test was conducted on an unpainted bogie frame valid for DM1, T and M2 Cars. Nondestructive Testing (NDT) was carried out on this bogie frame. Imperfections found by nondestructive examination of the bogie frame before and after the fatigue test were evaluated. No crack induced by the test is permitted anywhere in the bogie frame (base material and welding included). The measured stresses given in the modified Goodman diagrams show that the fatigue stresses are within allowable limits.

Keywords: bogie design; fatigue strength testing; electrical multiple units; finite element analysis; FEA; strength loads; safety margins; rapid transit systems; Taiwan; stress range; safety factors; safety values; bogie frames; finite element method; FEM; magnetic particle testing; nondestructive testing; NDT; radiographic testing.

DOI: 10.1504/IJMPT.1999.036262

International Journal of Materials and Product Technology, 1999 Vol.14 No.1, pp.102 - 122

Published online: 01 Nov 2010 *

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