Vehicle-track-underground modeling of rail induced wave propagation

Lane, Håkan; Ekevid, Torbjörn; Kettil, Per; Ching, Chun Yuen; Wiberg, Nils‐Erik

doi:10.1016/j.compstruc.2006.11.032

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…Shih et al also implemented a 3D FE model for critical velocity studies and included soil nonlinearity [132,133]. Other 3D FE models are given in [134][135][136][137]. In [138] a moving element method was introduced to reduce the model size.…”

Section: Numerical Methods In the Time Domain And Two-stage Schemesmentioning

confidence: 99%

Modelling, simulation and evaluation of ground vibration caused by rail vehicles

Thompson

Kouroussis

Ntotsios

2019

Vehicle System Dynamics

125

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There is a great need to develop rail networks over long distances and within cities as more sustainable transport options. However, noise and vibration are seen as a negative environmental consequence. Compared with airborne noise, the related problem of ground vibration is much more complex. The properties of the ground vary significantly from one location to another. There is no common assessment criterion or measurement quantity and no equivalent to the noise maps. Ground-borne vibration is transmitted into buildings and perceived either as feelable whole-body vibration or as low frequency noise; it can also affect sensitive equipment but it is generally at a level that is too low to cause structural or cosmetic damage to buildings. A review is given of evaluation criteria for both feelable vibration and ground-borne noise, empirical and numerical prediction methods, the main vehicle and track parameters that can affect the vibration levels and a range of possible mitigation methods.

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Section: Numerical Methods In the Time Domain And Two-stage Schemesmentioning

confidence: 99%

Modelling, simulation and evaluation of ground vibration caused by rail vehicles

Thompson

Kouroussis

Ntotsios

2019

Vehicle System Dynamics

125

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“…The energy loss of the building is considered in terms of structural damping and material damping. This assumption also yields the secondary advantage of avoiding the modeling of subgrade soils, 36,37 and significantly increases the numerical efficiency.…”

Section: Treatment Of the Subgrade Soil At The Boundarymentioning

confidence: 99%

Prediction of structural vibrations using a coupled vehicle-track–building model

Gao

Xin

Cai

2014

Proceedings of the Institution of Mechanical Engineers, Part F:

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As a result of local factors, limited amounts of land and construction demands, subway lines are sometimes designed to run in close proximity to buildings. Hence, using a real Beijing subway engineering project, we have studied the vibration induced in a building by a moving rail vehicle. A numerical model of the spatially coupled vehicle-track-building system was developed to predict the vibration levels in the structure. The modeling theory was verified by comparison with multi-body system simulations and field test results. Two common types of track, namely, ballasted track and floating slab track were studied and their vibration-mitigation effects were compared in the time and frequency domains. A comparison of the particle peak velocities with the structural vibration limits of the floating floor slab and the first floor of a building revealed a very low possibility of severe damage resulting from vehicle-induced vibration for both types of tracks. We also conducted a one-third octave analysis of the vibration of each building floor and obtained the weighted rootmean-squared acceleration and vibration levels. A comparison of the weighted accelerations with the vibration limits for vibration perception by a human for both types of tracks also revealed that train-induced vibration had no obvious effect on daily human activities on most of the floors. The main exception to this observation was the first floor, which is located close to the vibration source. It is recommended that the first floor should be used for purposes other than residential. Furthermore, a comparison of the vibration levels of each floor for both types of tracks showed that the ballasted track had a better vibration-mitigation effect than the floating slab track for this special engineering case.

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“…The density is denoted ρ and the constitutive matrix D defined as in equation (5). Based on the form functions N and the gradient matrix B =∇N, the local matrices are derived according to [7] …”

Section: Solid Elementmentioning

confidence: 99%

“…During the course of a Master Thesis [11], a CAD model of the Swedish contemporary high-speed locomotive X2 (figure 7) has been translated into finite elements. Based on the rigid body and connector definitions in the input file, the program FEM90 [8,12] calculates inertia matrices [7] and retains only the relevant degrees of freedom for a rigid body analysis. While a full-scale model with five wagons of the Swedish X2000 has also been developed, it is very demanding in terms of computational resources.…”

Section: Rigid Body Trainmentioning

confidence: 99%

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Finite element calculations of rail vibration countermeasures

Lane

Berg

Larsson

2007

NVSD

Self Cite

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Elastic waves may constitute a nuisance for people living close to high-speed lines. In order to decrease the spread of vibrations, it is common to reinforce the ground with lime cement columns. This article presents the results of simulations of three different ways to install the columns. The calculations have been done with an integrated rigid body -finite element model. Equations from various physical domains are merged into one big system. The results indicate that the straight configuration works best to protect the track. When attention is focused on preventing vibrations from the soil, the leaning column method is more effective. The chosen technique would depend on the aims of the countermeasure.

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Vehicle-track-underground modeling of rail induced wave propagation

Cited by 6 publications

References 9 publications

Modelling, simulation and evaluation of ground vibration caused by rail vehicles

Modelling, simulation and evaluation of ground vibration caused by rail vehicles

Prediction of structural vibrations using a coupled vehicle-track–building model

Finite element calculations of rail vibration countermeasures

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