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Determination of Railway Vertical Wheel Impact Magnitudes: Field Trials

Author(s):

Medium: journal article
Language(s): English
Published in: Structural Health Monitoring, , n. 1, v. 6
Page(s): 49-65
DOI: 10.1177/1475921707072063
Abstract:

The authors utilized both experimental and finite element modeling methods earlier to develop both a classical inverse approach as well as a root mean square (RMS) method to estimate the magnitude of wheel impact forces on railway track-like structures. This study presents some results from the field trials of the techniques developed in (Lee, M.L., Chiu, W.K. and Koss, L.L (2005). A numerical study into the reconstruction of impact forces on railway track-like structures. Structural Health Monitoring: An International Journal, 4(1), 19–45. Lee, M.L. and Chiu, W.K (2005). The reconstruction of dynamic impact forces on a railway track-like structure by using an inverse analysis technique. In: Proceedings of the 4th Australasian Congress of Applied Mechanics, pp. 605–610, Melbourne, Australia. Lee, M.L. and Chiu, W.K. (2005). A comparative study on impact force prediction on a railway track-like structure. Structural Health Monitoring: An International Journal, 4(4), 355–376.). A length of track carrying freight rail traffic and situated along the Melbourne–Geelong line (Victoria, Australia) is instrumented with accelerometers and shear-bridges. The instrumentation consists of five rail cribs instrumented with a shear-bridge and an accelerometer on the rail foot at the midspan of each crib. Using the shear-bridge instrumentation as a check, it is found that the proposed inverse analysis method (IAM) shows potential in not only reconstructing clean impact strikes but also in reconstructing strikes occurring outside of the shear-bridge effective zone within a single crib. Furthermore, based on the principle of superposition governing linear systems, multiple impact strikes within a single crib of rail are also able to be reconstructed. Regarding the RMS method, it is found that while a good correlation (R ≈ 0.8) existed between wheel impact force and track response RMS, a significant spread existed in the data.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1177/1475921707072063.
  • About this
    data sheet
  • Reference-ID
    10561552
  • Published on:
    11/02/2021
  • Last updated on:
    19/02/2021
 
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