ISO DIS 20138-2

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

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Organization: ISO
Publication Date: 19 November 2018
Status: active
Page Count: 39
ICS Code (Railway engineering in general): 45.020
scope:

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

The present 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, power and energy for all types of rolling stock either as vehicles or units 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 specific acceptance criteria (pass/fail).

The present 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 demanded adhesion exceeds the available adhesion (wheel slide activity).

 The present document contains examples of the calculation of brake forces for different brake equipment types and calculation of stopping distance relevant to vehicles or units.

The methodology of step by step calculation is based on numerical time integration

Document History

ISO DIS 20138-2
November 19, 2018
Railway applications - Calculation of braking performance (stopping, slowing and stationary braking) - Part 2: General algorithms utilizing step by step calculation
The present document specifies the methodologies for calculation of braking performance for railway rolling stock and is applicable to all countries. The present document describes the general...

References

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