A portable instrument has been developed with which it is possible to measure Iongitudinal railhead irregularities to an accuracy of about 1 micron r.m.s. in the 30 mm - 100 mm wavelength range, with slightly poorer accuracies in shorter and longer wavelength ranges. Profile data are recorded on an industry-standard laptop computer using a software package written for this purpose. This software also provides the means of analyzing data rapidly and routinely to show components of the profile in different wavelength ranges, and to calculate statistical quantities such as the r.m.s. amplitude which can be used to characterize corrugation severitv. lt is proposed that the fraction of track over which the r.m.s. amplitude of longitudinal irregularities exceeds specified limits is a useful criterion to assess grinding quality. Limits of 3 microns, 7 microns, 45 microns and 100 microns should be exceeded over Iess than 5 % of the length of ground track in the wavelength ranges 10 mm - 30 mm, 30 mm - 100 mm, 100 mm - 300 mm, 300 mm - 1000 mm and 1000 mm - 3000 mm respectively.


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    Title :

    Measurement of longitudinal rail irregularities and criteria for acceptable grinding


    Additional title:

    Die Messung von longitudinalen Eisenbahnschienenoberflächendefekten und Untersuchung von Kriterien für akzeptable Schleifbearbeitungen


    Contributors:
    Grassie, S.L. (author) / Saxon, M.J. (author) / Smith, J.D. (author)

    Published in:

    Publication date :

    1999


    Size :

    16 Seiten, 6 Bilder, 2 Tabellen, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English