Full Description

Scope

1.1 This document specifies a direct measurement method for characterizing the surface roughnessof the rail and wheel associated with rolling noise ("acoustic roughness"), in the form of a one-thirdoctave band spectrum.

This document describes a method for:

a) selecting measuring positions along a track or selecting wheels of a vehicle;

b) selecting lateral positions for measurements;

c) the data acquisition procedure;

d) measurement data processing in order to estimate a set of one-third octave band roughness spectra;

e) presentation of this estimate for comparison with limits of acoustic roughness;

f) comparison with a given upper limit in terms of a one-third octave band wavelength spectrum;

g) the measuring system requirements.

1.2 It is applicable to the:

a) compliance testing of reference track sections in relation to the acceptance test for noise emitted byrailway vehicles;

b) performance testing of track sections in relation to noise emitted by railway vehicles;

c) acceptance of the running surface condition only in the case where the acoustic roughness is theacceptance criterion;

d) assessment of the wheel surface condition as an input for the acoustic acceptance of brake blocks;

e) assessment of the wheel and rail roughness as input to the calculation of combined wheel railroughness;

f) diagnosis of wheel-rail noise issues for specific tracks or wheels;

g) assessment of the wheel and rail roughness as input to rolling noise modelling;

h) assessment of the wheel and rail roughness as input to noise source separation methods.

1.3 It is not applicable to the:

a) measurement of roughness (rail roughness, wheel roughness or combined roughness) using anindirect method;

b) analysis of the effect of wheel-rail interaction, such as a "contact filter";

c) approval of rail and wheel reprofiling, including rail grinding operations, except for those where theacoustic roughness is specifically the approval criterion (and not the grinding quality criteria as provided in e.g. EN 13231-3);

d) characterization of track and wheel geometry except where associated with noise generation.

Cross References:
ISO 266:1997
EN 61260-1:2014
IEC 61260-1:2014
EN ISO 266:1997
CEN/TR 16891
EN 13848-1
EN 16729-3
ISO 3095
EN 15313
ISO/IEC Guide 98-3
EN ISO 3095
CEN/TR 15874
EN 13231-3
EN 13979-1


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Product Details

Published: 05/09/2019 ISBN(s): 9780580872396 Number of Pages: 38 File Size: 1 file , 4 MB Product Code(s): 30304302, 30304302, 30304302 Note: This product is unavailable in United Kingdom