EN 15302:2008+A1:2010

Foreword
Introduction
1 Scope
2 Normative references
3 Symbols
4 Principle of determining the equivalent conicity
5 Description of the reference procedure
6 Benchmark calculation
Annex A (informative) - Example of presentation of delta r function
        and conicity
Annex B (informative) - Example of method for determining the
        equivalent conicity by integration of the nonlinear
        differential equation
Annex C (informative) - Example of method for determining the
        equivalent conicity by linear regression of the delta r
        function
Annex D (normative) - Reference profiles
Annex E (normative) - Calculation results with reference profiles
Annex F (normative) - Tolerances on equivalent conicity
Annex G (informative) - Examples of calculation results with introduced
        errors
Annex H (informative) - Guideline for application of errors
Annex I (informative) - Guidelines for application
Annex ZA (informative) - Relationship between this European Standard
         and the Essential Requirements of EU Directive 2008/57/EC
         of the European Parliament and of the Council of 17 June
         2008 on the interoperability of the rail system within the
         Community (Recast)
Bibliography

This European Standard establishes an evaluation procedure for determining equivalent conicity. A benchmark calculation is specified to achieve comparable results on a consistent basis for the equivalent conicity, which may be calculated by different methods not given in this European Standard. This European Standard also proposes possible calculation methods. Informative examples of the use of the Klingel formula (see Annex B) and linear regression of the r-function (see Annex C) are included in this European Standard.This European Standard includes reference profiles, profile combinations, tolerances and reference results with tolerance limits, which allow the user to assess the acceptability of a measuring and calculation system including random- and grid- errors of the measuring system. It sets down the principles of calculation that need to be followed but does not impose any particular numerical calculation method.This European Standard does not define limits for the equivalent conicity and gives no tolerances for the rail profile and the wheel profile to achieve acceptable results for the conicity.For purposes outside the scope of this European Standard (e.g. simulation of vehicle behaviour) it can be useful or necessary to use more sophisticated theories. These methods are not within the scope of this European Standard.For the application of this European Standard some general recommendations are given in Annex I.