Railway applications. Noise emission. Road test of standard for rail roughness measurement EN 15610:2009

PD CEN/TR 15874:2009 Railway applications. Noise emission. Road test of standard for rail roughness measurement EN 15610:2009

PD CEN/TR 15874:2009 provides a road test to check that BS EN 15610:2009 can be interpreted consistently and leads to a consistent estimate of roughness spectrum when used by different measurers with different instruments.

Contents of EN 15610:

Foreword

1􀀃 Introduction

1.1 Background

1.2 Objectives of the road test

2 Brief review of the nature and requirements of the new standard

2.1 Longitudinal position of measurement records and sample length

2.2 Lateral position of the measurements on the rail head

2.3 Processing

3 The measurement programme

3.1 The test procedure

3.2 Test sites

3.2.1 Loriol

3.2.2 Wildenrath

3.3 Teams and instruments

4 Comparison of the practices of the teams

4.1 Choice of lateral position

4.1.1 Loriol

4.1.2 Wildenrath

4.1.3 Conclusion on success of the provisions for identifying the reference surface

4.2 Longitudinal sampling and cleaning the rail head

5 The common analysis applied to the raw data

5.1 Spike processing

5.2 DFT and filtering analysis techniques

5.3 Treatment of long records in which rail-head defects are present

5.4 Chatter/screech

5.5 Observations made on results presented in Appendices A and B

5.5.1 Loriol

5.5.2 Wildenrath

5.6 Overall observations

6 Comparisons of roughness spectra

6.1 The datum line spectra

6.2 The 100 m test section results

7 Conclusions

Annex A (informative) Results from Loriol for all instruments processed using the common processing method

Annex B (informative) Results from Wildenrath for all instruments processed using the common processing method

Annex C (informative) Review of rail-head defects encountered at Loriol

Bibliography