Effects of the dynamic wheel–rail interaction on the ground vibration generated by a moving train

Cai, Yuanqiang; Cao, Zhigang; Sun, Honglei; Xu, Changjie

doi:10.1016/j.ijsolstr.2010.04.013

Cited by 46 publications

(15 citation statements)

References 26 publications

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“…To facilitate this Kenny [2] and Fryba [3] developed closed-form analytical solutions for ground response from moving loads. This area of research was expanded upon by Krylov et al [4], Cai et al [5] and more recently by Salvador et al [6] to focus specifically on high speed train problems. One such approach was attempted by Ditzel et al [7] where an embankment is modelled, but restrictions require that the embankment is embedded inside the soil and has perfectly vertical sides.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Connolly

Giannopoulos

Forde

2013

Soil Dynamics and Earthquake Engineering

208

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A three dimensional numerical model is presented capable of modelling the propagation and transmission of ground vibration in the vicinity of high speed railways. It is used to investigate the effect of embankment constituent material on ground borne vibration levels at various distances from the track.The model is a time domain explicit, dynamic finite element model capable of simulating non-linear excitation mechanisms. The entire model, including the wheel/rail interface is fully coupled. To account for the unbounded nature of the soil structure an absorbing boundary condition (infinite element) is placed at the truncated interfaces. To increase boundary absorption performance, the soil structure is modelled using an elongated spherical geometry.The complex geometries associated with the track components are modelled in detail thus allowing a highly realistic simulation of force transmission from vehicle to embankment. Lastly, quasi-static and dynamic excitation mechanisms of the vehicle locomotives are described using a multibody approach which is fully coupled to the track using non-linear Hertzian contact theory.The resulting model is verified using experimental ground borne vibration data from high speed trains, gathered through field trials. It is then used to investigate the role of embankments in the transmission of vibration. It is found that soft embankments exhibit large deflections and act as a waveguide for railway vibrations which are trapped within the structure. This results in increased vibration levels both inside the embankment and in the surrounding soil. In contrast it is found that embankments formed from stiffer material reduce vibrations in the near and far fields.

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Section: Introductionmentioning

confidence: 99%

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Connolly

Giannopoulos

Forde

2013

Soil Dynamics and Earthquake Engineering

208

View full text Add to dashboard Cite

show abstract

“…The numerical method is a relatively mature method, including the finite difference method, finite element method, infinite element method, and boundary element method [15][16][17][18][19]. The finite element method is most commonly used, and its main advantage is that objects with complex geometries and boundary conditions can be simulated [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

2020

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Constructing buildings above subway tracks exploits urban-area space intensively by adopting the three-dimensional overlapping development mode, which is one of the important measures for solving the contradictions among urban population increase, land resource shortage, and environmental protection. However, the vibration generated by the frequent train operations is transmitted to the upper buildings through the track structure and ground soil, which can cause structural vibrations and radiated noise and bring physical and mental side effects to occupants within the buildings. Subway projects are often located in geologically sensitive areas, while the influences of the encountered geological problems on the generation and propagation of structural vibration and structure-radiated noise within the buildings are not yet clear. Hence, this paper presents a method of studying the train-induced vibration transmission from the ground up into the buildings and the structure-radiated noise within the building. The method consists of a train-track model, track-soil-building model, and structure-radiated noise simulation. The impact of soil properties on the building vibration and structure-radiated noise is analyzed and ground-improvement measures are proposed in order to mitigate vibration and structure-radiated noise within buildings. The results show that the interaction between soil and structure has a great impact on vibration transmission from the ground into the building. Good foundations reduce vibration transmission from ground soil up into the building and lead to a lower level of structure-radiated noise. Ground improvements increase the impedance of ground soil, thereby weakening the vibration transmission and lowering the structure-radiated noise.

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“…For many practical applications, a linear theory of poroelasticity can be safely exploited for stress analyses of porous media. To date, such a theory has been widely applied to a large body of problems pertinent to biomechanics and medical engineering [8][9][10], geomechanics [11][12][13], hydrology [14,15], materials science [16][17][18], physics and geophysics [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

An exact solution to the problems of flexo-poro-elastic structures rested on elastic beds acted upon by moving loads

2019

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This paper aims to examine flexural vibrations of fully saturated poroelastic structures on an elastic bed subjected to moving point loads via an analytical solution. Using a flexural beam model in conjunction with the Biot's poro-elasticity theory, the equations of motion of the porous structure are derived. Using assumed mode method and Laplace transform, the explicit expressions of displacement and pore pressure are obtained carefully.For a particular case, the predicted results are also compared with those of another work and a reasonably good agreement is achieved. The influences of the moving load velocity, permeability ratio, transverse stiffness of the foundation, viscosity of the pore fluid, and porosity on the maximum elasto-dynamic fields and pore pressure are conclusively discussed.The velocity pertinent to the maximum possible dynamic response is graphically determined and the roles of influential parameters on this crucial factor are displayed. The present model could be easily extended to multi-layered poroelastic structures under moving loads.

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Effects of the dynamic wheel–rail interaction on the ground vibration generated by a moving train

Cited by 46 publications

References 26 publications

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

An exact solution to the problems of flexo-poro-elastic structures rested on elastic beds acted upon by moving loads

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