Customer Support: +1 416-401-8730

Login to i2i Subscription Intertek.com
  • There are no items in your cart
Please enter a keyword to search
Advanced search
Home
NSAI
I.S. EN 15302:2021

I.S. EN 15302:2021

Current

Current

The latest, up-to-date edition.

Railway applications - Wheel-rail contact geometry parameters - Definitions and methods for evaluation

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-25-2021

Publisher

National Standards Authority of Ireland

Preview

For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.

Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

European foreword
Introduction
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
7 Plausibility check and processing of measured wheel and rail profiles
8 Determining the wheel-rail contact positions and contact functions
9 Determining the equivalent conicity and the related nonlinearity parameter
10 Determining the rolling radii coefficient
11 Other wheel-rail contact parameters
12 Testing of calculation software for contact geometry parameters
13 Assessment of the complete process for determination of wheel-rail contact parameters
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
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
Annex G (informative) Method for determining linearization parameters by harmonic linearization
Annex H (informative) Handling of special cases of the Δr function
Annex I (normative) Reference profiles for testing
Annex J (normative) Calculation results with reference profiles
Annex K (normative) Tolerances on equivalent conicity for testing calculations
Bibliography

This document establishes definitions and evaluation methods for wheel-rail contact geometry parameters influencing the vehicle running dynamic behaviour: — the rolling radius difference between the two wheels of a wheelset (Δr-function) which serves as a basis for all further calculations; — the equivalent conicity function from which are derived: — 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; — 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; — the rolling radii coefficient which is used to describe the theoretical radial steering capability of a wheelset in a curved track.

Committee
CEN/TC 256
DocumentType
Standard
Pages
146
ProductNote
The date of any NSAI previous adoption may not match the date of its original CEN/CENELEC document.
PublisherName
National Standards Authority of Ireland
Status
Current
Supersedes

Standards Relationship
EN 15302:2021 Identical

View more information
US$159.69
Excluding Tax where applicable
USD
CAD
CHF
CNY
DKK
EUR
GBP
HKD
IDR
INR
JPY
KRW
MXN
NOK
NZD
SEK
SGD
USD
ZAR
Hardcopy - English
PDF - English
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Learn more on subscription solutions

or

Get in touch with us