An Efficient Three-Dimensional Track/Tunnel/Soil Interaction Analysis Method for Prediction of Vibration and Noise in a Building

Abe, Kazuhisa; Yamada, Koya; Yamada, Sota; Furuta, Mamoru; Suehara, Michiko; Yoshitake, Sho; Koro, Kazuhiro

doi:10.1007/978-3-030-70289-2_37

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The point sound pressure level (dB re 2 × 10 −5 Pa) inside a building located near a subway line can be calculated by the following formula ( 22 ):…”

Section: Damping Fastener Parameter Selectionmentioning

confidence: 99%

Long-Term Efficient Control of Structure-Borne Noise Inside Buildings Caused by Underground Railways by Using Novel Damping Fasteners

Gao

Zhao

Yang

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Damping fasteners provide vibration isolation to railway tracks because of their low vertical stiffness and improve the in-service performance of the tracks. In this paper, a new type of high lateral stiffness and vertical damping fastener is developed. First, the vibration suppression frequency band of the new fastener was determined from a field test, the design vertical stiffness was determined by calculating the P2 resonance frequency, and the vertical stiffness before and after a fatigue load test was found. Then, field experiments were carried out in buildings with known excessive subway train-induced vibration problems to assess the effectiveness of the proposed fastener, which showed that the damping fasteners reduced the vertical and transverse vibrations of the tunnel wall by 10 dB without increasing the transverse displacements of the rail. Furthermore, the structure-borne noise reduction in all measured buildings exceeded 3 dB. The study demonstrated that the replacement of novel damping fasteners is a feasible solution for controlling vibrations and noise in buildings adjacent to subway lines.

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“…The point sound pressure level (dB re 2 × 10 −5 Pa) inside a building located near a subway line can be calculated by the following formula ( 22 ):…”

Section: Damping Fastener Parameter Selectionmentioning

confidence: 99%

Long-Term Efficient Control of Structure-Borne Noise Inside Buildings Caused by Underground Railways by Using Novel Damping Fasteners

Gao

Zhao

Yang

et al. 2023

Transportation Research Record: Journal of the Transportation R

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“…Therefore, at least, its dynamic characteristics should be discussed based on average values. Although the expected value of energy spectrum density (ESD) of structural or ground vibration can be approximately evaluated based on one roughness sample by smoothing the response over each 1/3 octave frequency band (Abe et al, 2021), a reduction in frequency resolution might be unavoidable.…”

Section: Introductionmentioning

confidence: 99%

An analytic solution of mathematical expectation for bogie-track interaction problems

Yoshino

Abe

Koro

2023

Mechanical Engineering Journal

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This paper presents a frequency-domain analytic solution of mathematical expectation for bogie-track dynamic interaction problems in which a random roughness on the railhead is considered. To achieve this, the Floquet transformation is applied to the coupling system consisting of a bogie and an infinite track. Due to the periodicity of the sleeper spacing, the present problem is reduced to that in a representative track unit. Transformed solutions are expressed by Fourier series in the unit cell. The unknown Fourier coefficients are then obtained from infinite simultaneous equations. In the present formulation the vibration reaction due to the roughness is described in terms of the response function of the bogie-track coupling system and the power spectrum density (PSD) of rail roughness. The track dynamic nature which is independent of the roughness is represented by the former. To validate the derived solution, comparison with time-domain numerical solution is carried out. Furthermore, based on the developed frequency-domain method, two kind of pad damping model given by a constant loss factor and viscous damping are compared through evaluation of the expected value of energy spectrum density (ESD) of rail vibration and the PSD of wheel acceleration. Finally, influence of track structure such as the dynamic equivalent stiffness of rail pad and that of under-sleeper pad on the expectation of ESD of rail vibration and the PSD of wheel acceleration is examined.

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Method for Predicting Environmental Vibration Impact of Existing Subway Lines and Its Practical Application

Zhao,

Shi,

Shi

et al. 2024

Transportation Research Record: Journal of the Transportation R

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To predict accurately the impact of track vibrations caused by subway trains on adjacent buildings and address the problem of their excessive dynamic response, a method for predicting the environmental vibration impact of existing subway lines is proposed in this paper. A coupled numerical dynamical model of the train/track/tunnel system is established using the multi-scale method. Using field-measured soil vibration data, empirical formulas for soil frequency and material damping coefficient are calibrated. By combining the numerical model and the empirical formulas, buildings’ indoor vibrations and noise level can be assessed. At the same time, a solution to the problem of excessive vibration of buildings along a subway line is also proposed that optimizes the track fastener parameters. Field tests verified the accuracy of the prediction method and the effectiveness of the optimized track parameters. These research results provide a reference for predicting the vibration of buildings along subway lines and using the proposed preventive solutions.

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An Efficient Three-Dimensional Track/Tunnel/Soil Interaction Analysis Method for Prediction of Vibration and Noise in a Building

Cited by 4 publications

References 6 publications

Long-Term Efficient Control of Structure-Borne Noise Inside Buildings Caused by Underground Railways by Using Novel Damping Fasteners

Long-Term Efficient Control of Structure-Borne Noise Inside Buildings Caused by Underground Railways by Using Novel Damping Fasteners

An analytic solution of mathematical expectation for bogie-track interaction problems

Method for Predicting Environmental Vibration Impact of Existing Subway Lines and Its Practical Application

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