Performance of Floating Slab Track with Rubber Vibration Isolator

Author:

Deng Shijie1,Ren Juanjuan12ORCID,Zhang Kaiyao1,Xiao Yuanjie1,Liu Jia3,Du Wei1,Ye Wen-Long1

Affiliation:

1. MOE Key Laboratory of High-Speed Railway Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China

2. Changsha University of Science & Technology, School of Traffic and Transportation Engineering, Changsha 410114, P. R. China

3. Department of Civil and Environmental Engineering, Technical University of Darmstadt, Darmstadt 64287, Germany

Abstract

This study systematically introduces a floating slab track (FST) with rubber vibration isolator (RVI) and investigates its behavior in urban rail transit. The FEM is used for modal analysis to clarify the modal parameters of the FST system. A vehicle–slab track coupling sub-model and a tunnel–soil coupling sub-model were established and the propagation law was analyzed by calculating the vertical vibration accelerations beneath the shield wall as well as the vertical vibratory acceleration levels of the surrounding soil. A wheel-set drop test was carried out to verify the actual vibration isolation effect compared with the numerical models. The results reveal that the vibratory acceleration levels at the distance of 20[Formula: see text]m from the tunnel center-line basically meet the requirements for vibration in most areas of a city. The variation trend of the vibratory acceleration level measured in laboratory tests agrees well with the calculated values from the numerical simulation. The attenuation amplitude of the levels reaches 19.33[Formula: see text]dB with the German high disturbance irregularity and 20.05[Formula: see text]dB with the short-wave irregularity in the simulation, and the levels are reduced by 45–58[Formula: see text]dB in laboratory tests which demonstrate the FST with RVI performs well in vibration isolation.

Funder

National Key R&D Program of China

National Natural Science Foundation of China

Sichuan Youth Science and Technology Innovation team

Publisher

World Scientific Pub Co Pte Ltd

Subject

Applied Mathematics,Mechanical Engineering,Ocean Engineering,Aerospace Engineering,Building and Construction,Civil and Structural Engineering

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