ДСТУ CEN/TR 17469:2022 Железнодорожный транспорт. Методы проектирования осей колесных пар (CEN/TR 17469:2020, IDT)

ДСТУ CEN/TR 17469:2022
(CEN/TR 17469:2020, IDT)

Залізничний транспорт. Методи проєктування осей колісних пар

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

European foreword

Introduction

1 Scope

2 Normative references

3 Terms, definitions, symbols and abbreviations

3.1 Terms and definitions

3.2 Symbols and abbreviations

4 Loads

4.1 Reliability analysis based on the Stress Strength Interference Analysis method

4.2 Fatigue load analysis method

4.2.1 General

4.2.2 Load signals processing and Fatigue-Equivalent-Load

4.2.3 Method to generate the distribution of in-service load severities

4.3 Fatigue reliability assessment of a railway passenger coach axle

4.3.1 Load measurements

4.3.2 Load spectra classification and generation and distribution of load severity

4.3.3 Estimation of the probability of a crack initiation

5 Modelling

5.1 General

5.2 Stress concentration factors

5.3 Length of the transition

5.4 Numerical modelling of axles

5.4.1 Development of numerical models and validation

5.4.2 Analysis of mounted components

5.4.3 Modelling recommendations

5.5 Axle calculation method

6 Fatigue limits

6.1 Testing method principals

6.1.1 F1 tests

6.1.2 F4 tests

6.1.3 Fatigue limit estimation

6.2 Test plan

6.3 Axle body fatigue limit results

6.3.1 F1 standard surface - transitions and groves (EA4T axles)

6.3.2 F1 Blasted surface - transitions (EA4T axles)

6.3.3 F1 Standard surface - transitions (EA1N axles)

6.3.4 F1 Corroded surfaces - transitions of unpainted axles

6.4 Axle press-fit seat fatigue limits (F4)

6.4.1 Diameter ratio = 1,12 (EA4T axles)

6.4.2 Diameter ratio = 1,08 (EA4T)

7 Safety factors

7.1 Aims and problem statement

7.2 Probabilistic fatigue assessment

7.2.1 Failure probability under constant amplitude stress

7.2.2 Fatigue damage under VA loading

7.2.3 Bignonnet method

7.3 Input data for probabilistic fatigue assessment of railway axles

7.3.1 Definitions of reference S-N diagrams

7.3.2 Miner Index at failure

7.3.3 Target reliability and failure rate for railway axles

7.4 Probabilistic fatigue damage calculations for railway axles

7.4.1 Format for the calculations

7.4.2 Montecarlo simulations

7.4.3 Stress spectra

7.5 Results

7.5.1 General

7.5.2 Safety factor and reliability under constant amplitude stress

7.5.3 Safety factor for damage calculations

8 Conclusions of Euraxles Project

9 Recommendations of CEN TC256/SC2/WG11

Annex A (informative) Application example of the axle calculation method

A.1 General

A.2 General descriptions

A.3 Load distribution

A.4 Results according to EN 13103-1

A.5 Design of EURAXLES method

A.6 Comparison of results

Bibliography