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.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Symbols and abbreviations <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5 Methods and requirements to assess cross wind stability of vehicles 5.1 General <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.2 Applicability of cross wind methodologies for rolling stock assessment purposes <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.3 Determination of aerodynamic coefficients 5.3.1 General 5.3.2 Predictive formula <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.3.3 Simulations by Computational Fluid Dynamics (CFD) 5.3.3.1 General <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.3.3.2 Benchmark tests 5.3.3.3 Vehicle model 5.3.3.4 Computational domain 5.3.3.5 Computational mesh <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 5.3.4 Reduced-scale wind tunnel measurements 5.3.4.1 General 5.3.4.2 Benchmark test <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.3.4.8 Train model setup 5.3.4.9 Modelling accuracy 5.3.4.10 Instrumentation requirements <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 5.3.4.11 Standard ground configuration single track ballast and rail <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 5.3.4.12 Test program requirements 5.3.4.13 Data interpolation <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 5.4.3 Advanced quasi-static method 5.4.3.1 General 5.4.3.2 Computational method <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 5.4.3.3 Vehicle model verification 5.4.3.4 Calculation of the CWC <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | 5.4.4.3 Vehicle model setup 5.4.4.4 Vehicle model verification 5.4.4.5 Input of aerodynamic forces and moments <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 5.4.4.6 Calculation of CWC <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 5.5 Presentation form of characteristic wind curves (CWCs) 5.5.1 General <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 5.5.2 CWC presentation form for passenger vehicles and locomotives <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 5.5.3 CWC presentation form for freight wagons <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | 5.6 Requirements 5.6.1 Requirements for passenger vehicles and locomotives running at 250 km\/h \u2264 vmax \u2264 360 km\/h <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 5.6.2 Requirements for passenger vehicles and locomotives running 140 km\/h < vmax < 250 km\/h 5.6.3 Requirements for freight wagons <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | 6.2.3 Vertical profile <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | 6.2.4 Track design speed <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | 6.2.5 Walls 6.2.6 Meteorological input data for line description <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | 6.2.7 Integrated line database <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 6.2.8 Required minimum resolution\/accuracy 7 Methods to assess the wind exposure of a railway line <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | 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 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Railway applications. Aerodynamics – Requirements and test procedures for cross wind assessment<\/b><\/p>\n |