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  • BSI
    PD CEN/TR 17792:2022 Railway Applications. Wheel-rail contact geometry parameters. Technical report and background information about EN 15302
    Edition: 2022
    $538.63
    / user per year

Description of PD CEN/TR 17792:2022 2022

This document provides background information regarding the changes from EN 15302:2008+A1:2010 to the revised version dated 2021, including the reasons for decisions and additional explanation and guidance that is not appropriate in the standard. The range of equivalent conicity results obtained with different software tools is described. The additional wheel-rail contact parameters, rolling radii coefficient and nonlinearity parameter, are explained. More information is also provided on the different calculation methods and the updated reference profiles for the assessment. The influence of simplifications used in determination of equivalent conicity is discussed. To provide more information on the importance of considering the complete measurement and calculation process, methods for plausibility checks, eliminating outliers and assessing the uncertainty and repeatability of measurements are included as well as assessments of the smoothing process. Guidance is given on fields of application of the wheel-rail contact parameters, on the selection of appropriate reference profiles (choice of reference rail profile and rail inclination for assessing wheel profiles and vice versa) and on handling special cases. As some references in EN 14363 to wheel-rail contact test conditions have caused difficulties in understanding, clarifications issued by ERA are mentioned. Interpretation of equivalent conicity results, using tools such as conicity maps, is discussed and various approximations such as ‘quick conicity’ assessments are also described. Information is included on possible additional wheel-rail contact parameters, not yet ready for standardization, but where further experience is needed. NOTE In this document the commonly used term “wheel-rail contact geometry” is used as a synonym for the more precise term “wheelset-track contact geometry”.

Standard NumberPD CEN/TR 17792:2022
TitleRailway Applications. Wheel-rail contact geometry parameters. Technical report and background information about EN 15302
StatusDefinitive
Publication Date2022-03-08
Identical National Standard OfCEN/TR 00256878
ICS17.040.20 Properties of surfaces, 45.060.01 Railway rolling stock in general
CommitteeRAE/1/-/8
ISBN978 0 539 15052 0
PublisherBSI
Pages90

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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