PD CEN/TR 16891:2016 - Railway applications. Acoustics. Measurement method for combined roughness, track decay rates and transfer functions

PD CEN/TR 16891:2016

Railway applications. Acoustics. Measurement method for combined roughness, track decay rates and transfer functions

Status : Current   Published : June 2016

Format
PDF

Format
HARDCOPY



This method is used to determine combined wheel-rail roughness and track decay rates from rail vibration during the pass-by of a train. By combining sound pressure measurement from the same pass-by, a vibro-acoustic transfer function for rolling noise is determined.

The track decay rate is a vibration quantity that characterizes the attenuation of rail vibration along the track for a given wheel/rail contact excitation, and thereby affects the amount of sound radiation from the track.

Combined roughness is a quantity that determines the level of excitation of wheel-rail rolling noise. It can be determined from vertical rail vibration during a train pass-by and the vertical track decay rate. The transfer function can be used to characterize the vibro-acoustic behaviour of the vehicle-track system for a given roughness excitation and in relation to rolling noise. Combined roughness, track decay rates and transfer functions are determined as one-third octave spectra.

The method can be used for the following purposes:

  • to measure track decay rates under operational conditions;

  • to characterize the effectiveness of noise control measures in terms of combined roughness, transfer function and track decay rate;

  • to compare the combined roughness before and after noise control measures are implemented (thereby quantifying the effect of any change in wheel or rail roughness);

  • to monitor wheel roughness during a pass-by, either of whole trains or parts of trains; — to separate rolling noise from other sources;

  • to assess a threshold for the rail roughness by measuring multiple pass-bys.

The method is not for approval of sections of reference track in terms of acoustic rail roughness and track decay rates, which are covered by EN 15610 and EN 15461, respectively.

The method is applicable to trains on conventional tracks, i.e. normal ballasted tracks with wooden or concrete sleepers and on ballastless track systems.

The method has not yet been validated for:

  • non-standard wheel types such as small wheels up to 600 mm diameter, resilient tram wheels;

  • non-standard track types such as embedded rail or grooved rail;

The method is not applicable to track with rail joints.




Standard NumberPD CEN/TR 16891:2016
TitleRailway applications. Acoustics. Measurement method for combined roughness, track decay rates and transfer functions
StatusCurrent
Publication Date30 June 2016
Normative References(Required to achieve compliance to this standard)EN 15461, EN 15610, EN ISO 266, ISO 266
Informative References(Provided for Information)1304/2014/EU, EN 61260-1, IEC 61260-1, EN ISO 3095, ISO 3095, ISO 5348
International RelationshipsCEN/TR 16891:2016
DescriptorsRailways, Acoustics, Measurement, Surface-roughness measurement, Roughness (surface), Wheels, Railway track, Vibration, Railway vehicles, Sound intensity, Transfer functions Railway applications
ICS17.140.30
93.100
Title in GermanBahnanwendungen. Akustik. Messmethode für kombinierte Rauheit, Gleisabklingraten und Übertragungsfunktionen
CommitteeEH/1/2
ISBN978 0 580 74370 2
PublisherBSI
FormatA4
DeliveryYes
Pages60
File Size5.051 MB
Price£254.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


BSOL

The faster, easier way to work with standards


Develop a PAS

Develop a fast-track standardization document in 9-12 months