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Control of railway induced ground vibrations: {I}nfluence of excitation mechanisms on the efficiency of resilient track layers

Book Contribution - Book Chapter Conference Contribution

© Springer-Verlag Berlin Heidelberg 2015 Summary. This paper focuses on the insertion of resilient layers in the track as mitigation measures for ground-borne noise and vibration. Soft rail pads, under-sleeper pads or ballast mats are considered as mitigation measures.Common train-track interaction models using unevenness excitation predict reduction of ground vibrations around and above the natural frequency of the rolling stock unsprung mass on the track stiffness, in agreement with experimental observations. In the lower frequency range, i.e. below this natural frequency, computations show an increase of vibration that is not always confirmed by experimental results recorded on ballasted tracks.The excitation mechanisms play a role in the measured efficiency. In this paper the insertion losses computed with an unevenness and a parametric excitation model are compared. The results show that, depending on the train speed, the low frequency range insertion loss, related to resilient layer insertion in the track, is not always negative for parametric excitation.
Book: Proceedings of the 11th International Workshop on Railway Noise
Pages: 635 - 642
Number of pages: 8
ISBN:978-3-662-44831-1
Publication year:2013
BOF-keylabel:yes
IOF-keylabel:yes
Authors from:Higher Education