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المؤلفNtotsios E.
المؤلفThompson D.J.
المؤلفHussein M.F.M.
تاريخ الإتاحة2020-04-01T06:54:47Z
تاريخ النشر2019
اسم المنشورTransportation Geotechnics
المصدرScopus
الرقم المعياري الدولي للكتاب22143912
معرّف المصادر الموحدhttp://dx.doi.org/10.1016/j.trgeo.2019.100256
معرّف المصادر الموحدhttp://hdl.handle.net/10576/13611
الملخصWith the development of non-ballasted track forms (often referred to as slab tracks) over the few last decades, it is important to understand their behaviour with respect to ground-borne vibration compared with the traditional ballasted tracks. This is important in deciding between the use of the two track forms. The present work aims to quantify the differences between slab tracks and ballasted tracks numerically by using the MOTIV model. This is a general and fully coupled three-dimensional model that works in the wavenumber-frequency domain. It can predict the vibration levels of the track and the ground due to the gravitational loading of a passing train and the wheel and rail unevenness. A comparative analysis between the two track types is presented in terms of ground vibration with emphasis given to the influence of the stiffness and inertial parameters of the two track forms. It is shown that, for the same fastener stiffness there are only small differences in ground vibration behaviour, with the mass of the track slab leading to reductions of 1–3 dB at frequencies above 16 Hz. However, if softer rail fasteners are used in the slab track, as is usual, this leads to further reductions above 63 Hz. The critical velocity on soft soil is also considered. Although there is little difference between the different tracks for a homogeneous ground, for grounds with a soft surface layer the critical velocity is increased by the slab bending stiffness. The maximum rail displacement is also smaller for a slab track than the equivalent ballasted track.
راعي المشروعThe work described here has been supported by the EPSRC under the programme grant EP/M025276/1, ‘The science and analytical tools to design long life, low noise railway track systems (Track to the Future)’ and the MOTIV project (Modelling of Train Induced Vibration), grants EP/K005847/2 and EP/K006002/1. All data published in this article are openly available from the University of Southampton repository at https://doi.org/10.5258/SOTON/D1001.
اللغةen
الناشرElsevier Ltd
الموضوعBallasted track
Critical speed
Ground-borne vibration
MOTIV model
Slab track
العنوانA comparison of ground vibration due to ballasted and slab tracks
النوعArticle
رقم المجلد21
dc.accessType Open Access


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