Rail roughness and rolling noise in tramways

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Chiacchiari, L.^1 ; Thompson, D.J.^1 ; Squicciarini, G.^2 ; Ntotsios, E.^2 ; Loprencipe, G.^1

DICEA - Department of Civil, Building and Environmental Engineeering, Sapienza University of Rome, Via Eudossiana 18, Rome, Italy^1

ISVR-Institute of Sound and Vibration Research, University of Southampton, University Rd, Southampton

SO17 1BJ, United Kingdom^2

关键词: Empirical approach;    Ground vibration;    Noise measurements;    Potential effects;    Prediction model;    Rail surface irregularities;    Railway applications;    Urban environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012147/pdf
DOI  :  10.1088/1742-6596/744/1/012147

来源: IOP

【 摘 要 】

Companies which manage railway networks have to cope continually with the problem of operating safety and maintenance intervention issues related to rail surface irregularities. A lot of experience has been gained in recent years in railway applications but the case of tramways is quite different; in this field there are no specific criteria to define any intervention on rail surface restoration. This paper shows measurements carried out on some stretches of a tram network with the CAT equipment (Corrugation Analysis Trolley) for the principal purpose of detecting different states of degradation of the rails and identifying a level of deterioration to be associated with the need for maintenance through rail grinding. The measured roughness is used as an input parameter into prediction models for both rolling noise and ground vibration to show the potential effect that high levels of roughness can have in urban environment. Rolling noise predictions are also compared with noise measurements to illustrate the applicability of the modelling approach. Particular attention is given to the way the contact filter needs to be modelled in the specific case of trams that generally operate at low speed. Finally an empirical approach to assess vibration levels in buildings is presented.