BSI PD CEN/TS 17843:2022

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Railway applications. Investigations on vehicles to quantify track loading in curve radii below 250 m

Published By	Publication Date	Number of Pages
BSI	2022	24

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Categories: 45.060.01 - Railway rolling stock in general, BSI

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This document covers the following aspects: — Definition of a common method to assess track loading of a heavy rail vehicle for lines of 1 435 mm track gauge in curve radii below 250 m (test zone 5), which is not part of the acceptance testing according to EN 14363. This method is restricted to vehicles with maximum vertical wheelset forces up to 225 kN. It includes consideration of: — on-track measurements with instrumented wheelsets; — on-track measurements with local measurement sites; — simulation including description of requirements for use; — recalculation of EN 14363 results including description of requirements for use; — simple parameter check (dispensation from assessment of track loading). — Description of available knowledge of running behaviour of existing vehicles. — Description of observed track wear and damage related to traffic mix, track loading results of vehicles and axle loads related to track design. The decision which railway line requires these tests is not part of this specification. This specification can support national regulations in this field but does not affect directly existing national regulations such as [4] and [5].

PDF Catalog

PDF Pages	PDF Title
2	undefined
7	1 Scope 2 Normative references 3 Terms and definitions
8	4 Deviation from requirements 5 Test requirements 5.1 General 5.2 Test extent 5.3 Test vehicle 5.4 Test conditions 5.5 Assessment of test results and documentation
9	6 Test zone 5 – dynamic performance assessment 6.1 General 6.2 Choice of measuring method 6.3 Performing on-track tests 6.3.1 General 6.3.2 Test zone 5 categories and track sections
10	6.3.3 Test operation 6.4 Measured quantities and measuring points 6.5 Assessment quantities and limit values 6.5.1 General
11	6.5.2 Quasi-static guiding force 6.6 Test evaluation 6.6.1 Statistical evaluation 6.6.2 Calculation of results using multiple regression
12	6.6.3 Consideration of test track specific specialities 6.6.3.1 Jointed track 6.6.3.2 ‘Cat Ears’ 6.6.3.3 Track quality 6.7 Dispensation from tests, reduced test extent
13	Annex A (informative)Running Safety and Track Loading in Curves with R < 250 m A.1 Running Safety A.1.1 General A.1.2 Derailment parameter Y/Q A.1.3 Track shift force ∑Y
14	A.2 Track loading
17	Annex B (informative)Example for a simplified method using simulation validated for application under test zone 5 conditions B.1 General B.2 Validation of vehicle model B.2.1 General
18	B.2.2 gaining data of wayside measuring site B.3 Track layout, track quality and rail sections B.4 Simulation of track loading
19	Annex C (informative)Example of limit values
20	Annex D (informative)Simple parameter check (dispensation from assessment of track loading)