Experimental study of the vibration characteristics of the floating slab track in metro turnout zones

Jiang, Bolong; Ma, Meng; Li, Minghang; Liu, Weining; Li, Teng

doi:10.1177/0954409719826824

Cited by 24 publications

(9 citation statements)

References 19 publications

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“…The point-supported floating-slab track is designed based on the mass-spring-damping theory, and the purpose of vibration reduction is achieved by reducing the natural frequency of the structure. At present, many studies have evaluated the point-supported floating-slab track (Huang et al, 2018; Jiang et al, 2019; Lei and Jiang, 2016; Lombaert et al, 2006; Nelson, 1996). For example, the research of Cui and Chew (2000) showed that compared with the ordinary track structure, the floating-slab track can effectively attenuate the vibration in the frequency domain of its designed vibration reduction.…”

Section: Introductionmentioning

confidence: 99%

Vibration-reduction optimization of the point-supporting floating-slab track based on local resonance mechanism

Jin

Wang²,

et al. 2021

Journal of Vibration and Control

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With the continuous increase of subway operating mileage, the problem of subway vibration has become more and more significant. Nowadays, the point-supported floating-slab track is recognized as the best method to control track vibration, which is mainly designed based on the mass-spring-damping theory. How to further improve the vibration control ability of the point-supported floating-slab track? In this paper, a new type of rubber point-supported floating slab track is designed based on the local resonance theory. Through calculation and dynamic test, it is obtained as follows: (1) The band gap of the point support structure by local resonance type depends on the two vertical vibration modes. (2) As the elastic modulus of the cladding layer increases, the bandwidth of the band gap of the corresponding structure increases significantly. (3) The increase of the vibrator density can increase the bandwidth, while reducing the start and stop frequencies, which is beneficial to attenuate the resonance of the floating-slab track. (4) The cushion material parameters of point support structure by local resonance type 2 will not affect the band gap. The increase in sleeve density will reduce the band gap, which is not conducive to vibration reduction. Local resonance type floating-slab track will be the development direction of track vibration-reduction measures in the future.

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Section: Introductionmentioning

confidence: 99%

Vibration-reduction optimization of the point-supporting floating-slab track based on local resonance mechanism

Jin

Wang²,

et al. 2021

Journal of Vibration and Control

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“…Researchers have done some research on the identification of track modal parameters using laboratory tests [6], field tests [7]- [10], and numerical analysis [11], [12]. However, they have two common limitations: (1) only track modal parameters of a certain state can be obtained; (2) only track modal parameters of a certain section can be obtained.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach of Identifying Railway Track Rail’s Modal Frequency From Wheel-Rail Excitation and Its Application in High-Speed Railway Monitoring

Gao

Xin

et al. 2019

IEEE Access

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High-speed railway track defects such as rail corrugation, wheel polygonal wear, and rail fastener clip failure are closely related to the modal frequency of the track structure. As the operation time increases, the modal parameters of the track structure will change, and it is necessary to know what they are to diagnose the vibration characteristics. Present methods of modal analysis are limited by measuring points and excitations and cannot be used to extract the operational parameters of the railway track. This paper proposes a novel approach using wheel-rail excitations to identify the rail modal frequency from vibration monitoring data. The approach decomposes the rail acceleration after the wheel-rail excitation passes into intrinsic mode functions and extracts their instantaneous frequencies. The modal frequencies of the rail can be identified from the instantaneous frequencies. To demonstrate the feasibility of the approach, the results using the proposed approach are compared with the modal frequencies of the rail identified using the eigensystem realization algorithm. Then the approach is applied to study the influence of the number of wheel-rail excitations and the number of monitoring points on the identification results in high-speed railway ballastless track rail. The paper concludes that the proposed approach can provide a reliable solution for the identification of the operational modal frequency of track rails based on the monitoring data. INDEX TERMS High-speed railway track, operational modal frequency, synchrosqueezed wavelet transform, variational mode decomposition.

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“…During the last decades, many different theoretical models are available to simulate the dynamic behavior of railway tracks, which plays an important role on the generation of vibration and rolling noise [3][4][5]. In these models, Hertz wheel/rail contact model was common used and irregularities between wheel-rail were considered as the excitation element.…”

Section: Introductionmentioning

confidence: 99%

Simulation on metro railway induced vibration. Part I: effect of out-of-round wheels

Zhang¹,

Ren²,

Zhang³

et al. 2019

Vib. proced.

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This paper discussed the effect of out-of-round wheels on simulation of rail dynamic behavior in the frequency range for ground vibration and ground-borne noise. A train-track interaction model was built by software Simpack and Abaqus. The input roughness was measured from a worn wheel and was applied moving on perfect smooth rail surface in different train speeds. Simulation results indicated that out-of-round wheel would affect the calculation result that could not be neglected, as the affected frequency range would be lower enough to influence the ground vibration (1-80 Hz) and ground-borne noise (16-250 Hz).

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Experimental study of the vibration characteristics of the floating slab track in metro turnout zones

Cited by 24 publications

References 19 publications

Vibration-reduction optimization of the point-supporting floating-slab track based on local resonance mechanism

Vibration-reduction optimization of the point-supporting floating-slab track based on local resonance mechanism

A Novel Approach of Identifying Railway Track Rail’s Modal Frequency From Wheel-Rail Excitation and Its Application in High-Speed Railway Monitoring

Simulation on metro railway induced vibration. Part I: effect of out-of-round wheels

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