Dynamic Analysis on the Stiffness Enhancement Measure of the Slab End for a Discontinuous Floating Slab Track

Yang, Jianjin; Lan, Kai; Zhu, Shengyang; Wang, Kaiyun; Zhai, Wanming; Yuan, Xuancheng

doi:10.1109/mcse.2018.2880781

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…The track irregularity is the measured irregularity power spectrum density (PSD) X(k), and the inverse Fourier method is adopted to transform the PSD. 21 Then, the timedomain function of track irregularity x(n) is obtained, as shown in equation (9), where N r is the sampling number. The generated sample of track irregularity is shown in Figure 10.…”

Section: Track Irregularity and Contact Relationmentioning

confidence: 99%

“…8 Yang et al established a coupled dynamic model of multi-carriage and SSFST and studied the influence of the stiffness enhancement measure on the dynamic performance of the system. 9 The FEM takes too long to calculate a 3D model, while the BEM has developed rapidly in vibration response research because it can reduce integral dimension and greatly shorten calculation time. There are a lot of research on the combination of FEM and BEM, including the periodic FEM-BEM and wave number domain FEM and BEM.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic characteristic difference of steel-spring floating slab track between single-carriage and multi-carriage models

Chang

Cai

Wang

2021

Noise & Vibration Worldwide

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The steel-spring floating slab track (SSFST) is a low-stiffness structure, sensitive to the vehicle loads. Due to the coupling effect of the superposition of adjacent bogies, it is difficult for conventional single-carriage models to meet the simulation requirements. To find a balance between computation efficiency and authenticity of analytical model results, the influence of carriage number on SSFST should be studied. Based on the finite element method and multi-body dynamics, a refined three-dimensional coupled model of multi-carriage-SSFST-tunnel was established. The difference in the dynamic response of the SSFST between single-carriage and multi-carriage models was analyzed and compared with the measured data. The field test results show that structural displacements and accelerations under the two-carriage model are much closer to the measured data. The dynamic model analysis results show that the maximum displacement of the rail and SSFST in the midspan of the slab increase by 0.48 mm and 0.34 mm under the multi-carriage model, and the vibration reduction effectiveness increases by 1.4–2.0 dB. Dynamic responses of the rail and SSFST show minor differences under the two-carriage and three-carriage models. The article is expected to provide a reference for the theoretical research, design, and layout optimization of subway SSFST.

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Section: Track Irregularity and Contact Relationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic characteristic difference of steel-spring floating slab track between single-carriage and multi-carriage models

Chang

Cai

Wang

2021

Noise & Vibration Worldwide

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“…Yang et al [59] applied stiffness Enhancement Measure (SEM) of slab end for discontinuous FST. They coupled dynamic model for train and FST to investigate the dynamic behavior of SEM on the train and FST.…”

Section: Floating Slab Trackmentioning

confidence: 99%

A numerical and experimental investigation of a special type of floating-slab tracks

Alabbasi

Hussein

Abdeljaber

et al. 2020

Engineering Structures

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“…In the subject of steel-spring floating plate tracks for urban rail transport, where shear hinges are preferred between adjacent floating plates, the issue of discontinuity between track plates has received much attention in previous studies. To examine the restraint impact of shear hinges between track slabs, Yang et al [8] simulated shear hinges using vertical and transverse shear springs. Wei et al's [9] simulation of shear hinges using bending shear spring damping units allowed them to determine the ideal set of parameters for shear hinges between track slabs.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of CRTS II Ballastless Track-Vehicle System Based on Moving Unit Method

Tao

et al. 2023

Applied Sciences

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On account of the influence of the discontinuity of CRTS II ballastless track slabs and the discrete support of track pads on the high-speed rail vehicle-ballastless track system, a vibration analysis calculation model of the ballastless track-vehicle coupling system was established on the basis of the moving unit method. The dynamic response of the system at different travel speeds and with and without consideration of the track plate discontinuities was investigated. The effect of the random process discontinuity on the dynamic response of the steel rails was analyzed by Fourier inverse transform on the high and low discontinuity spectra of ballastless rails on China’s high-speed rail. We also generated time domain samples of the track discontinuity corresponding to the three percentile spectra. The results show that the dynamic response of the track structure increases with the speed of the train under the condition of track unevenness, with the dynamic response of the steel rail being the most significant, while the dynamic response of the track slab and concrete foundation decreases step by step compared with that of the steel rail; the discontinuity of the track slab has a low impact on the vertical acceleration of the vehicle and does not affect the smoothness of the train; the magnitude of the dynamic response of the rail increases as the amplitude of the irregularities increases or the wavelength decreases. In the wavelength of 2~30 m, the maximum and as the wavelength of the discontinuity sample increases, the oscillation of the power response time curve decreases significantly and tends to be smooth.

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Dynamic Analysis on the Stiffness Enhancement Measure of the Slab End for a Discontinuous Floating Slab Track

Cited by 7 publications

References 16 publications

Dynamic characteristic difference of steel-spring floating slab track between single-carriage and multi-carriage models

Dynamic characteristic difference of steel-spring floating slab track between single-carriage and multi-carriage models

A numerical and experimental investigation of a special type of floating-slab tracks

Dynamic Analysis of CRTS II Ballastless Track-Vehicle System Based on Moving Unit Method

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