ISO 20138-2:2019

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Railway applications — Calculation of braking performance (stopping, slowing and stationary braking) — Part 2: General algorithms utilizing step by step calculation

Published By	Publication Date	Number of Pages
ISO	2019-11	40

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Categories: 45.020 - Railway engineering in general, ISO

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Description

This document specifies the methodologies for calculation of braking performance for railway rolling stock.

This document describes the general algorithms/formulae using instantaneous value inputs to perform calculations of brake equipment and braking performance, in terms of stopping/slowing distances, braking power and energy for all types of rolling stock, either as vehicles or units.

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

This document is not intended to be used as a design guide for the 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 demanded adhesion exceeds the available adhesion (wheel slide activity).

This document contains examples of the calculation of brake forces for different brake equipment types and examples of the calculation of stopping distance for vehicles or units.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	2019-11
Pages Count	40
Language	France
Edition	1
File Size	2.8 MB
ICS Codes	45.020 - Railway engineering in general

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ISO 20138-2:2019

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