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Continuous measurement of interaction forces between wheel and rail

Authors
  • Ham, Young-Sam1
  • Lee, Dong-Hyong1
  • Kwon, Seok-Jin1
  • You, Won-Hee1
  • Oh, Taek-Yul2
  • 1 Korea Railroad Research Institute, Railway System Research Department, Uiwang-si, Gyeonggi-do, 437-757, South Korea , Gyeonggi-do (South Korea)
  • 2 Kyung Hee University, Department of Mechanical Engineering, Yongin-si, Gyeonggi-do, 449-701, South Korea , Gyeonggi-do (South Korea)
Type
Published Article
Journal
International Journal of Precision Engineering and Manufacturing
Publisher
Korean Society for Precision Engineering
Publication Date
Jan 01, 2009
Volume
10
Issue
1
Pages
35–39
Identifiers
DOI: 10.1007/s12541-009-0006-3
Source
Springer Nature
Keywords
License
Yellow

Abstract

Oscillatory wheel load fluctuation of considerable amplitude is always observed in railway cars traveling at high speed. This paper describes a continuous method for measuring the derailment coefficient and the forces between the wheel and rail. The acceleration measured on the axle box indicates that the frequency of this fluctuation can be as high as 70 Hz. Continuous measurement of wheel load using conventional methods is not possible due to this high frequency phenomenon. We have developed a new method for continuous measurement of these forces and the derailment coefficient using two pairs of strain gauge bridges with output phases shifted by 90°, and summing their outputs with a weighting function. This method works for measuring the forces between wheel and rail at high frequencies.

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