ISO/DIS 20138-1

This Draft International Standard is in the enquiry phase with ISO members.

Will replace ISO 20138-1:2018

ISO/DIS 20138-1

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Abstract

This document specifies methodologies for calculation of braking performance for railway rolling stock and is applicable to all countries.

This document describes the general algorithms/formulae using mean value inputs to perform calculations of brake equipment and braking performance in terms of stopping/slowing distances, stationary braking, power and energy for all types of rolling stock, either as single vehicles or train formations, with respect to the braking distance.

The calculations can be used at any stage of the assessment process (design, manufacture, testing, verification, investigation, etc.) of railway rolling stock. This document does not set out the specific acceptance criteria (pass/fail).

This document is not intended to be used as a design guide for selection of brake systems and does not specify performance requirements. This document does not provide a method to calculate the extension of stopping distances when the level of available adhesion is exceeded (wheel slide activity).

This document contains examples of the calculation of brake forces for different brake equipment types and calculation of stopping distance and stationary braking relevant to a single vehicle or a train.

General information

Status
: Under development

You can help develop this draft international standard by contacting your national member

Stage
: DIS ballot initiated: 12 weeks [40.20]
Edition
: 2

Number of pages
: 72
Technical Committee :
ISO/TC 269/SC 2

ICS :
45.020
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