In this study, the effectiveness of two different types of resilient wheels in reducing noise and vibrations has been compared from three different points of view: structural vibrations transmitted to the car body and the bogie, structural vibrations transmitted to the track, and noise emissions to the environment. The finite element method has been used for this purpose with the wheelset having been modelled as an elastic body. By means of this technique, quarter car models have been defined for three different wheels: a monobloc wheel, a resilient wheel with rubber blocks, and a resilient wheel with a V-shaped rubber ring. These models have been used to perform both a modal analysis and a spectral analysis, the latter having included an analysis of each wheel's vibratory response under the action of realistic track irregularities. On the basis of this latter calculation, the sound power emitted by the three wheels has also been compared. In general terms, it has been observed that at low frequencies, below 100 Hz, vibrations at the different points of the vehicle are not reduced by using resilient wheels, which means they are not useful for reducing low-frequency vibrations. This trend, however, is reversed at frequencies of over 100 Hz, and in general terms the use of resilient wheels is advantageous. As regards the transmission of structural vibrations to the rest of the vehicle, the energy transmitted to the points of connection between the wheelset and the primary suspension when using resilient wheels is around 5% of the energy transmitted when using monobloc wheels, which represents a reduction of 95%. The same occurs in relation to the energy that reaches the bogie. When comparing the energy transmitted to the car body, however, this difference is not as pronounced, although the resilient wheels still perform better, with reductions of around 20%. This does not mean, however, that the vibrations transmitted to the car body are greater in absolute terms than those transmitted to other elements located underneath, but that a significant part of the vibrations has been filtered by the secondary suspension, and the difference between using resilient wheels and monobloc wheels is less pronounced than at other points of the vehicle. Although the behaviour of both resilient wheels is very similar, in this case, the wheel with rubber blocks is more effective.


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    Titel :

    Effectiveness of resilient wheels in reducing noise and vibrations


    Weitere Titelangaben:

    Effektivität lärmreduzierter Räder


    Beteiligte:
    Suarez, B. (Autor:in) / Chover, J.A. (Autor:in) / Rodriguez, P. (Autor:in) / Gonzalez, F.J. (Autor:in)


    Erscheinungsdatum :

    2011


    Format / Umfang :

    21 Seiten, 30 Bilder, 4 Tabellen, 37 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Effectiveness of resilient wheels in reducing noise and vibrations

    Suarez, B / Chover, J A / Rodriguez, P et al. | SAGE Publications | 2011


    Effectiveness of resilient wheels in reducing noise and vibrations

    Suarez, B. / Chover, J.A. / Rodriguez, P. et al. | British Library Online Contents | 2011



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    Efficiency of resilient wheels on the alleviation of railway ground vibrations

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