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  • BSI
    BS EN 15302:2021 Railway applications. Wheel-rail contact geometry parameters. Definitions and methods for evaluation
    Edition: 2021
    $641.56
    / user per year

Description of BS EN 15302:2021 2021

This document establishes definitions and evaluation methods for wheel-rail contact geometry parameters influencing the vehicle running dynamic behaviour:

  1. the rolling radius difference between the two wheels of a wheelset (? r-function) which serves as a basis for all further calculations;

  2. the equivalent conicity function from which are derived:

    1. a single equivalent conicity value for a specified amplitude which is relevant for the assessment of vehicle running stability on straight track and in very large radius curves according to EN 14363 ;

    2. the nonlinearity parameter which characterizes the shape of this function and is related to the vehicle behaviour particularly in the speed range close to the running stability limit;

  3. the rolling radii coefficient which is used to describe the theoretical radial steering capability of a wheelset in a curved track.

Additional information is given about the relationship between the contact angles of the two wheels of a wheelset (?tan?-function) and about the roll angle parameter.

NOTE

Out of the presented parameters only those related to the contact angle are relevant for independently rotating wheels of wheel pairs.

Descriptions of possible calculation methods are included in this document. Test case calculations are provided to achieve comparable results and to check the proper implementation of the described algorithms.

To validate alternative methods not described in this document acceptance criteria are given for the equivalent conicity function. This includes reference profiles, profile combinations, tolerances and reference results with tolerance limits.

This document also includes minimum requirements for the measurement of wheel and rail profiles as well as of the parameters needed for the transformation into a common coordinate system of right- and left-hand profiles.

This document does not define limits for the wheel-rail contact geometry parameters and gives no tolerances for the rail profile and the wheel profile to achieve acceptable results.

For the application of this document some general recommendations are given.



Standard NumberBS EN 15302:2021
TitleRailway applications. Wheel-rail contact geometry parameters. Definitions and methods for evaluation
StatusDefinitive
Publication Date2021-10-29
ReplacesBS EN 15302:2008+A1:2010
Identical National Standard OfEN 15302
DescriptorsRailway rails, Railway vehicles, Profile, Mathematical calculations, Railway track, Tolerances (measurement), Dimensional measurement, Geometry, Profile measurement, Wheels, Railway vehicle components, Wavelengths
ICS17.040.20 Properties of surfaces, 45.060.01 Railway rolling stock in general
CommitteeRAE/1/-/8
ISBN978 0 580 98206 4
PublisherBSI
Pages144

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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