Abstract
Ground vibration and noise have been frequently observed in urban rail transit as a consequence of severe train-track dynamic interaction. To reduce train-induced vibration and noise, a new cone-oriented elastic side-supporting long sleeper damping track (COESSLSDT) is proposed in this paper. Unlike traditional sleeper damping tracks, COESSLSDT sleeper is suspended by two pairs of conical elastic side-supporting pads (ESSPs) on both sides, and the outer sides of ESSPs are connected with both sides of the sleeper groove by conical interference fit. Firstly, the mechanical performance of the COESSLSDT was obtained through static and dynamic analyses with a finite element (FE) model and then validated in the field. Then, the proposed model was used to evaluate the effects of key structural parameters of ESSPs on the mechanical performance and energy dissipation performance of COESSLSDT. Finally, the effect of side and bottom supports on the dynamic responses of the track structure under drop hammer impact load was studied, and the numerical results were compared with field test data. Both computational and experimental results demonstrate that COESSLSDT have good mechanical and dynamic responses control performance.
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