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BS EN 15302:2021 Railway applications. Wheel-rail contact geometry parameters. Definitions and methods for evaluation, 2021
- undefined
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols and abbreviations
- 5 Overview of the process for determining contact parameters
- 6 Description of wheel and rail profiles [Go to Page]
- 6.1 General
- 6.2 Uncertainty of the measuring systems
- 7 Plausibility check and processing of measured wheel and rail profiles
- 8 Determining the wheel-rail contact positions and contact functions [Go to Page]
- 8.1 General
- 8.2 Determining the rolling radius difference function
- 8.3 Other wheel-rail contact geometry functions
- 9 Determining the equivalent conicity and the related nonlinearity parameter [Go to Page]
- 9.1 Background to equivalent conicity [Go to Page]
- 9.1.1 Mathematical description of the kinematic lateral wheelset motion
- 9.1.2 Determining the wavelength of a coned wheelset
- 9.2 Determining the equivalent conicity
- 9.3 Determining the nonlinearity parameter
- 10 Determining the rolling radii coefficient [Go to Page]
- 10.1 Background and definition
- 10.2 Determining point E for the calculation of the rolling radii coefficient
- 11 Other wheel-rail contact parameters
- 12 Testing of calculation software for contact geometry parameters [Go to Page]
- 12.1 Overview
- 12.2 Validation of the calculation algorithms
- 12.3 Assessment of the smoothing process
- 13 Assessment of the complete process for determination of wheel-rail contact parameters [Go to Page]
- 13.1 General
- 13.2 Reproducibility of contact parameter determination based on rail profile measurement [Go to Page]
- 13.2.1 Manual rail profile measuring devices
- 13.2.2 Vehicle based rail profile measuring systems
- 13.3 Reproducibility of contact parameter determination based on wheel profile measurement [Go to Page]
- 13.3.1 Manual wheel profile measuring devices
- 13.3.2 Ground based wheel profile measuring systems
- Annex A (informative)Example of presentation of contact geometry functions
- Annex B (informative)Derivation of the kinematic equation of wheelset motion
- Annex C (informative)Determination of the lateral peak displacements
- Annex D (informative)Method for determining the wavelength of the wheelset motion by two-step integration of the nonlinear differential equation [Go to Page]
- D.1 General
- D.2 Step 1
- D.3 Step 2
- Annex E (informative)Method for determining the wavelength of the wheelset motion by direct integration of the nonlinear differential equation
- Annex F (informative)Method for determining the equivalent conicity by linear regression of the Δr function [Go to Page]
- F.1 General
- F.2 Concerns regarding the method
- Annex G (informative)Method for determining linearization parameters by harmonic linearization [Go to Page]
- G.1 General
- G.2 Concerns regarding the method
- Annex H (informative)Handling of special cases of the Δr function
- Annex I (normative)Reference profiles for testing [Go to Page]
- I.1 General
- I.2 Wheel A [Go to Page]
- I.2.1 Drawing
- I.2.2 Analytic definition
- I.2.3 Cartesian coordinates
- I.3 Wheel B [Go to Page]
- I.3.1 Drawing
- I.3.2 Analytic definition
- I.3.3 Cartesian coordinates
- I.4 Wheel C [Go to Page]
- I.4.1 Drawing
- I.4.2 Analytic definition
- I.4.3 Cartesian coordinates
- I.5 Wheel H [Go to Page]
- I.5.1 Drawing
- I.5.2 Analytic definition
- I.5.3 Cartesian coordinates
- I.6 Wheel I [Go to Page]
- I.6.1 Drawing
- I.6.2 Analytic definition
- I.6.3 Cartesian coordinates
- I.7 Rail A [Go to Page]
- I.7.1 Drawing
- I.7.2 Analytic definition
- I.7.3 Cartesian coordinates
- Annex J (normative)Calculation results with reference profiles [Go to Page]
- J.1 General
- J.2 Wheel A/Rail A [Go to Page]
- J.2.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.2.2 Numerical values for Δr function
- J.2.3 Numerical values for tanγe function
- J.3 Wheel B/Rail A [Go to Page]
- J.3.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.3.2 Numerical values for Δr function
- J.3.3 Numerical values for tanγe function
- J.4 Wheel C/Rail A [Go to Page]
- J.4.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.4.2 Numerical values for Δr function
- J.4.3 Numerical values for tanγe function
- J.5 Wheel H/Rail A [Go to Page]
- J.5.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.5.2 Numerical values for Δr function
- J.5.3 Numerical values for tanγe function
- J.6 Wheel I/Rail A [Go to Page]
- J.6.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.6.2 Numerical values for Δr function
- J.6.3 Numerical values for tanγe function
- J.7 Modified Wheel A (−2 mm on left wheel diameter)/Rail A [Go to Page]
- J.7.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.7.2 Numerical values for Δr function
- J.7.3 Numerical values for tanγe function
- J.8 Modified Wheel B (−2 mm on left wheel diameter)/Rail A [Go to Page]
- J.8.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.8.2 Numerical values for Δr function
- J.8.3 Numerical values for tanγe function
- J.9 Modified Wheel H (−2 mm on left wheel diameter)/Rail A [Go to Page]
- J.9.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.9.2 Numerical values for Δr function
- J.9.3 Numerical values for tanγe function
- J.10 Modified Wheel I (−2 mm on left wheel diameter)/Rail A [Go to Page]
- J.10.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.10.2 Numerical values for Δr function
- J.10.3 Numerical values for tanγe function
- J.11 (Right Wheel A – Left Wheel B)/Rail A [Go to Page]
- J.11.1 Representation of contact points, diagrams of Δr, Δtanγ, tanγe functions and representation of kinematic rolling movement of the wheelset on track
- J.11.2 Numerical values for Δr function
- J.11.3 Numerical values for tanγe function
- Annex K (normative)Tolerances on equivalent conicity for testing calculations [Go to Page]
- K.1 General
- K.2 Wheel A/Rail A [Go to Page]
- K.2.1 Diagram
- K.2.2 Numerical values
- K.3 Wheel B/Rail A [Go to Page]
- K.3.1 Diagram
- K.3.2 Numerical values
- K.4 Wheel C/Rail A [Go to Page]
- K.4.1 Diagram
- K.4.2 Numerical values
- K.5 Wheel H/Rail A [Go to Page]
- K.5.1 Diagram
- K.5.2 Numerical values
- K.6 Wheel I/Rail A [Go to Page]
- K.6.1 Diagram
- K.6.2 Numerical values
- K.7 Modified Wheel A (−2 mm on left wheel diameter)/Rail A [Go to Page]
- K.7.1 Diagram
- K.7.2 Numerical values
- K.8 Modified Wheel B (−2 mm on left wheel diameter)/Rail A [Go to Page]
- K.8.1 Diagram
- K.8.2 Numerical values
- K.9 Modified Wheel H (−2 mm on left wheel diameter)/Rail A [Go to Page]
- K.9.1 Diagram
- K.9.2 Numerical values
- K.10 Modified Wheel I (−2 mm on left wheel diameter)/Rail A [Go to Page]
- K.10.1 Diagram
- K.10.2 Numerical values
- K.11 (Right Wheel A – Left Wheel B)/Rail A [Go to Page]
- K.11.1 Diagram
- K.11.2 Numerical values [Go to Page]
