000021539 001__ 21539
000021539 005__ 20170622131251.0
000021539 04107 $$aeng
000021539 046__ $$k2017-06-15
000021539 100__ $$aNtotsios, Evangelos
000021539 24500 $$aTHE EFFECT OF TRACK UNEVENNESS CORRELATION ON RAILWAY INDUCED GROUND VIBRATION

000021539 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021539 260__ $$bNational Technical University of Athens, 2017
000021539 506__ $$arestricted
000021539 520__ $$2eng$$aThis paper focuses on quantifying the level of correlation of the track loading at the wheel/rail interface due to rail unevenness and its influence on predictions of ground vibration. The extent to which the unevenness of the two rails is correlated has been estimated from measurements of track geometry obtained with track recording vehicles for six different tracks. It was found that for wavelengths longer than about 3 m the unevenness of the two rails can be considered to be strongly correlated and in phase. To investigate the effect of this on ground vibration, a railway model that works in the wavenumber-frequency domain and includes separate inputs on the two rails has been used. In this model, the track is assumed as an infinite invariant linear structure resting on an elastic stratified half-space. This is excited by the gravitational loading of a passing train and the irregularity of the contact surfaces between the wheels and the rails. The railway model can account or discard the effect of load correlations on the two rails beside the effects of variation of the tractions across the width of the track-ground interface and the vehicle sprung mass, as well as the roll motion of the sleepers and the axle. A comparative analysis is carried out on the influence of these factors on the response predictions using numerical simulations. It is shown that, when determining the vibration in the free field, it is important to include in the model the non-symmetrical loading at the two rails that occurs for unevenness wavelengths shorter than about 3 m.

000021539 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021539 653__ $$aGround-borne vibration, track unevenness correlation, TRC measurements, frequency-wavenumber domain model.

000021539 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021539 720__ $$aNtotsios, Evangelos$$iHussein, Mohammed$$iThompson, David
000021539 8560_ $$ffischerc@itam.cas.cz
000021539 8564_ $$s1604477$$uhttp://invenio.itam.cas.cz/record/21539/files/16921.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS21] Ground-borne noise and vibrations due to traffic: prediction and mitigation
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000021539 962__ $$r21500
000021539 980__ $$aPAPER