Effect of additional anti-vibration sleeper track considering sleeper spacing and track support stiffness on reducing low-frequency vibrations

Sung, Deok-Yong; Chang, Seongkyu; Kim, Sangjin

doi:10.1016/j.conbuildmat.2020.120140

Cited by 17 publications

(6 citation statements)

References 42 publications

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“…Consequently, enhancing the capacity of track vibration isolators to mitigate low-frequency vibrations has emerged as a primary imperative. Sung et al [219] developed an additional anti-vibration sleeper track to reduce low-frequency vibrations. Qu et al [220] introduced a railway track concept inspired by chiral phononic crystals, offering significantly improved low-frequency vibration isolation through an orthogonal polarization coupling mechanism within the chiral subunit cell.…”

Section: Vibration Isolation In Railway Tracksmentioning

confidence: 99%

Structural Vibration Comfort: A Review of Recent Developments

Xie,

Hua

2024

Buildings

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With continuous improvements in the social economy and living standards of individuals, the vibration comfort of building structures has gradually been emphasized by academic and engineering communities, such as vehicle-induced vibrations in buildings near traffic, human-induced vibrations in large-span structures, wind-induced vibrations in super-high-rise buildings, and machinery-induced structural vibrations. Comfort-based structural analysis is distinct from traditional safety-based structural analysis, and its theoretical systems and unified guidelines have not yet been established. This paper reviews recent research on structural vibration comfort, including major load categories and their impacts, comfort-based structural analysis, evaluation methods, and vibration-mitigation measures. By presenting the shortcomings of the existing research, potential topics for future study are suggested.

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Section: Vibration Isolation In Railway Tracksmentioning

confidence: 99%

Structural Vibration Comfort: A Review of Recent Developments

Xie,

Hua

2024

Buildings

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“…The result shows that reducing vibration effects of vibration damping fasteners is determined to its own stiffness. (3) Vibration damping sleepers [15]. The effect of using a novel additional anti-vibration sleeper track (AAST) to reduce low-frequency vibrations (40-80 Hz) is investigated via numerical and field tests.…”

Section: Introductionmentioning

confidence: 99%

Band Gap Analysis of Improved Point-Supporting Structure for Floating-Slab Track Through Theoretical Model

Jin

2021

J. Vib. Eng. Technol.

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Purpose To improve the vibration-reduction ability of the point-supported floating slab track. Method Through theoretical derivation and numerical simulation, an improved Point Support Structure by Local Resonance Type (IPSSbyLRT) designed by the local resonance theory was studied. Results (1) The first-order bandgap range of IPSSbyLRT is 51-88 Hz, and the second-order bandgap range is 131-166 Hz.(2) As the elastic modulus of the outer cladding layer increases, the bandwidth of the first-order band gap decreases slightly, the bandwidth of the second-order band gap increases significantly. As the elastic modulus of the inner cladding layer increases, the bandwidth of the first-order band gap increases significantly, the bandwidth of the second-order band gap decreases sharply. (3) The increase in the density of the external vibrator can effectively reduce the second-order band gap start and cut-off frequencies of the structure. The increase in the internal vibrator density can effectively reduce both firstand second-order band gap start and cut-off frequencies of the structure. Conclusion Local resonance type floating slab track will be one of the development directions of track vibration-reduction measures in the future.

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“…LVT has good elasticity, but the supporting blocks are independent of each other, which may cause a bad dynamic between the wheel and rail and risk rail displacement under heavy loads if the train is larger [13]. If the track stiffness is too low, it may cause the track dynamic geometric deviation to exceed the limit under high-speed running conditions, which will affect the safety and comfort of running [14,15]. Therefore, LVT is limited to railways operating at speeds below 200 km/h, and in China it is limited to railways operating at a speed of 120 km/h.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Track Structure Parameters on the Dynamic Response Sensitivity of Heavy Haul Train-LVT System

et al. 2021

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Background: In order to study the applicability of Low Vibration Track (LVT) in heavy-haul railway tunnels, this paper carried out research on the dynamic effects of LVT heavy-haul railway wheels and rails and provided a technical reference for the structural design of heavy-haul railway track structures. Methods: Based on system dynamics response sensitivity and vehicle-track coupling dynamics, the stability of the upper heavy-haul train, the track deformation tendency, and the dynamic response sensitivity of the vehicle-track system under the influence of random track irregularity and different track structure parameters were calculated, compared and analyzed. Results: Larger under-rail lateral and vertical structural stiffness can reduce the dynamic response of the rail system. The vertical and lateral stiffness under the block should be set within a reasonable range to achieve the purpose of reducing the dynamic response of the system, and beyond a certain range, the dynamic response of the rail system will increase significantly, which will affect the safety and stability of train operation. Conclusions: Considering the changes of track vehicle body stability coefficients, the change of deformation control coefficients, and the sensitivity indexes of dynamic performance coefficients to track structure stiffness change, the recommended values of the vertical stiffness under rail, the lateral stiffness under rail, the vertical stiffness under block, and the lateral stiffness under block are, respectively 160 kN/mm, 200 kN/mm, 100 kN/mm, and 200 kN/mm.

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Effect of additional anti-vibration sleeper track considering sleeper spacing and track support stiffness on reducing low-frequency vibrations

Cited by 17 publications

References 42 publications

Structural Vibration Comfort: A Review of Recent Developments

Structural Vibration Comfort: A Review of Recent Developments

Band Gap Analysis of Improved Point-Supporting Structure for Floating-Slab Track Through Theoretical Model

The Influence of Track Structure Parameters on the Dynamic Response Sensitivity of Heavy Haul Train-LVT System

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