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BS EN 14067-6:2018+A1:2022

BS EN 14067-6:2018+A1:2022

$215.11

Railway applications. Aerodynamics – Requirements and test procedures for cross wind assessment

Published By Publication Date Number of Pages
BSI 2022 144
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This document gives guidelines for the cross wind assessment of railways. This document is applicable to all passenger vehicles, locomotives and power cars (with a maximum train speed above 140 km/h up to 360 km/h) and freight wagons (with a maximum train speed above 80 km/h up to 160 km/h) and track gauges from 1 435 mm to 1 668 mm inclusive. For passenger vehicles, locomotives and power cars with a maximum train speed between 250 km/h and 360 km/h, a requirement to demonstrate the cross wind stability is imposed. This document is not applicable to light rail and urban rail vehicles.

PDF Catalog

PDF Pages PDF Title
2 undefined
10 1 Scope
2 Normative references
3 Terms and definitions
11 4 Symbols and abbreviations
24 5 Methods and requirements to assess cross wind stability of vehicles
5.1 General
25 5.2 Applicability of cross wind methodologies for rolling stock assessment purposes
27 5.3 Determination of aerodynamic coefficients
5.3.1 General
5.3.2 Predictive formula
28 5.3.3 Simulations by Computational Fluid Dynamics (CFD)
5.3.3.1 General
29 5.3.3.2 Benchmark tests
5.3.3.3 Vehicle model
5.3.3.4 Computational domain
5.3.3.5 Computational mesh
30 5.3.3.6 Computational method
5.3.3.7 Turbulence modelling
5.3.3.8 Boundary conditions
5.3.3.9 Reynolds’ number
5.3.3.10 Test programme requirement
5.3.3.11 Data interpolation
5.3.3.12 Documentation
31 5.3.4 Reduced-scale wind tunnel measurements
5.3.4.1 General
5.3.4.2 Benchmark test
32 5.3.4.3 Turbulence level
5.3.4.4 Boundary layer
5.3.4.5 Reynolds’ number
5.3.4.6 Mach number
5.3.4.7 Blockage
33 5.3.4.8 Train model setup
5.3.4.9 Modelling accuracy
5.3.4.10 Instrumentation requirements
34 5.3.4.11 Standard ground configuration single track ballast and rail
35 5.3.4.12 Test program requirements
5.3.4.13 Data interpolation
36 5.3.4.14 Documentation
5.4 Determination of wheel unloading due to cross winds
5.4.1 General
5.4.2 Simple method
5.4.2.1 Application range and restrictions
5.4.2.2 General approach
5.4.2.3 Computation of the characteristic wind speed
39 5.4.3 Advanced quasi-static method
5.4.3.1 General
5.4.3.2 Computational method
40 5.4.3.3 Vehicle model verification
5.4.3.4 Calculation of the CWC
42 5.4.3.5 Verification
5.4.4 Time-dependent MBS method using a Chinese hat wind scenario
5.4.4.1 General
5.4.4.2 Chinese hat gust scenario
47 5.4.4.3 Vehicle model setup
5.4.4.4 Vehicle model verification
5.4.4.5 Input of aerodynamic forces and moments
48 5.4.4.6 Calculation of CWC
49 5.5 Presentation form of characteristic wind curves (CWCs)
5.5.1 General
50 5.5.2 CWC presentation form for passenger vehicles and locomotives
51 5.5.3 CWC presentation form for freight wagons
52 5.6 Requirements
5.6.1 Requirements for passenger vehicles and locomotives running at 250 km/h ≤ vmax ≤ 360 km/h
55 5.6.2 Requirements for passenger vehicles and locomotives running 140 km/h < vmax < 250 km/h
5.6.3 Requirements for freight wagons
56 6 Method to acquire the needed railway line data
6.1 General
6.2 Presentation form of railway line data
6.2.1 General
6.2.2 Plan profile
57 6.2.3 Vertical profile
58 6.2.4 Track design speed
59 6.2.5 Walls
6.2.6 Meteorological input data for line description
60 6.2.7 Integrated line database
62 6.2.8 Required minimum resolution/accuracy
7 Methods to assess the wind exposure of a railway line
63 8 Guidance for the analysis and assessment of the cross wind risk
8.1 General
8.2 Infrastructure with train speeds at or above 250 km/h
8.3 Infrastructure with train speeds below 250 km/h
64 9 Required documentation
9.1 General
9.2 Assessment of cross wind stability of passenger vehicles and locomotives
9.3 Assessment of cross wind stability of freight vehicles
9.4 Acquisition of railway line data

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BS EN 14067-6:2018+A1:2022
$215.11