Safety Assessment of Electromagnetic Exposure in High-Speed Train Carriage with Full Passengers

Abstract The objective of this work is to evaluate the safety of the electromagnetic environment in the carriage of high-speed trains exposed to power cables when the train is full of passengers. The electromagnetic model of a real carriage, two sets of power cables and the 84 passengers were set up by using COMSOL Multiphysics software based on CRH5. The distributions of induced electric and magnetic fields in the carriage, inside and on the surface of passengers were investigated. The results show that the induced electric and magnetic fields on the windows are greater than on the passengers and the max value of induced magnetic field is 2627.10 µT, and the max value of induced electric field is 2.0 × 105 mV m−1. The maximum values of the induced electric and magnetic fields in 84 passengers’ brain tissues were obtained, and it was found that the maximum values occurred in the third row passengers. The distribution of induced electric and magnetic fields at the cross-section of passengers’ heads in the third row was also obtained, and we found that the passengers at the window side were greater than those of aisle passengers. In the third row, the maximum values of the induced electric and magnetic fields in the head of two passengers near the window were 94.6 mV m−1, 90.9 µT, 96.3 mV m−1, and 90.4 µT, respectively. We also found the all data were below the ICNIRP Reference Levels, which indicates the electromagnetic exposure caused by power cables when the train is full of passengers will not threat passengers’ health.

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Determination of Necessary Subsidiary Track According to Train Operation Frequency in a Heterogeneous Train Pattern

Applied Sciences ◽

10.3390/app10124164 ◽

2020 ◽

Vol 10 (12) ◽

pp. 4164

Author(s):

Hyoung June Kim

Keyword(s):

Genetic Algorithm ◽

Waiting Time ◽

High Speed ◽

The Third ◽

Railway Construction ◽

Different Types ◽

High Speed Trains ◽

Train Operation ◽

Operation Frequency

In this study, a genetic algorithm was used to calculate the scheduled waiting time according to the train operation frequency of heterogeneous trains operating on one track. The acquired data were then used to determine the appropriate subsidiary track at which high-speed trains can load or release cargo away from low-speed trains. A metaheuristic genetic algorithm was applied and implemented using Javascript/jQuery. Six cases were investigated, which provided values of subsidiary track that vary according to the operation frequencies of different types of trains, and solutions were derived through 100 simulations using a stochastic method. The analysis results showed that the train overtaking frequency was the highest at the third intermediate station within the simulation, suggesting that this particular station requires a subsidiary track, even if the operating frequency of each train differs across the entire track considered in this study. The results of this study are expected to facilitate objective and practical planning during railway construction.

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Electromagnetic environment on extensive rail areas and the process of using electronic safety systems

WUT Journal of Transportation Engineering ◽

10.5604/01.3001.0014.4551 ◽

2018 ◽

Vol 121 ◽

pp. 21-30

Author(s):

Kamil Białek ◽

Jacek Paś

Keyword(s):

Magnetic Fields ◽

Electromagnetic Interference ◽

Electronic Equipment ◽

Electromagnetic Environment ◽

Security Systems ◽

Electric And Magnetic Fields ◽

Safety Systems ◽

The Impact

The article presents the results of research electric and magnetic fields in the field of higher frequencies, which are produced by electronic security systems in large logistics areas. The paper also presents the background of the electromagnetic environment. Distorted electromagnetic environment can interfere with the operation of electrical and electronic equipment that are used in the railway area. Particular attention has been paid to the impact of electromagnetic interference on selected electronic security systems.

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The Influence of Controller Parameters on the Quality of the Train Converter Current

Advances in Power Electronics ◽

10.1155/2011/832737 ◽

2011 ◽

Vol 2011 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

M. Brenna ◽

F. Foiadelli ◽

D. Zaninelli

Keyword(s):

Traffic Control ◽

High Speed ◽

Control Structure ◽

Pi Controller ◽

Signaling System ◽

Harmonic Content ◽

High Speed Trains ◽

Set Up ◽

A Current

This paper presents a stability analysis of train converters in order to evaluate how the controller parameters affect the absorbed current. The new dynamic model presented in this paper is capable of considering the time-variant nature of the system for the correct tuning of the feedback proportional-integral PI controller, applying a current controlled modulation technique never used in high-power traction converters. The reduction of the harmonic content of the current absorbed by a converter employed at the input stage onboard high-speed trains is really important, considering the interaction with the signaling system set up for traffic control. A computer model of the converter, considering both the power and the control structure, has also been implemented in order to deliver a validated tool for the developed theoretical analysis.

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Influence of Self-Induced Magnetic Field on the Stability of an Electron-Hole Plasma in Parallel Electric and Magnetic Fields

Physical Review B ◽

10.1103/physrevb.2.413 ◽

1970 ◽

Vol 2 (2) ◽

pp. 413-418 ◽

Cited By ~ 1

Author(s):

B. V. Paranjape ◽

K. C. Ng

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Induced Magnetic Field ◽

Electron Hole ◽

Hole Plasma ◽

Electron Hole Plasma ◽

Electric And Magnetic Fields ◽

The Stability

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Hall Currents and the Ejection of Prominences by Sunspots

Australian Journal of Chemistry ◽

10.1071/ch9490039 ◽

1949 ◽

Vol 2 (1) ◽

pp. 39

Author(s):

RG Giovanelli

Keyword(s):

Magnetic Fields ◽

Electric Fields ◽

Magnetic Force ◽

Large Space ◽

Space Charges ◽

Surrounding Atmosphere ◽

Electric And Magnetic Fields ◽

Order Of Magnitude ◽

General Movement ◽

Set Up

During the growth of sunspots induced electric fields may be expected to be set up in the surrounding atmosphere. It is shown that, because of the comparatively low conductivity perpendicular to lines of magnetic force, there are localized regions where large space charges occur, resulting in large electric fields perpendicular to the lines of magnetic force. Consequently both positive and negative charges drift in the same sense in a direction which is at right angles to the electric and magnetic fields, giving rise to a general movement of the gas. The drift velocities are difficult to estimate, but appear to be of the order of magnitude of those found in eruptive prominences.

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Virtual homologation of high-speed trains in railway tunnels: A new iterative numerical approach for train-tunnel pressure signature

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/09544097211029164 ◽

2021 ◽

pp. 095440972110291

Author(s):

Elia Brambilla ◽

Paolo Schito ◽

Claudio Somaschini ◽

Daniele Rocchi

Keyword(s):

High Speed ◽

Numerical Approach ◽

Design Tool ◽

Critical Conditions ◽

Rolling Stock ◽

Railway Tunnel ◽

High Speed Trains ◽

European Regulations ◽

Set Up ◽

Full Scale Tests

Large overpressures can be produced when a high-speed train enters and crosses a railway tunnel. Predicting them is important since, in critical conditions, pressure variations may be dangerous for train structures and for passengers’ health and comfort. European regulations impose pressure thresholds which trains must comply with in order to be homologated for travelling through tunnels. Currently, full-scale tests are required to demonstrate respect of these prescriptions. In this work, a procedure for calculating the pressure variations inside the tunnel based on 3 D steady CFD simulations and a 1 D compressible fluid-dynamics model is proposed, to be used both as a design tool and for virtual homologation of new rolling stock. Results of a large experimental campaign performed on the Italian high-speed line are used to set-up the proposed methodology and to validate it. Different train geometries, tunnel crossing speeds and tunnel initial air conditions are considered.

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A Study of Aerodynamic Effects of High-Speed Trains through Tunnels

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.94-96.1663 ◽

2011 ◽

Vol 94-96 ◽

pp. 1663-1667

Author(s):

Jing Zhao ◽

Ren Xian Li

Keyword(s):

High Speed ◽

Stokes Equations ◽

Navier Stokes ◽

High Speed Train ◽

Navier Stokes Equations ◽

Geometry Model ◽

Flow Geometry ◽

High Speed Trains ◽

Set Up ◽

Numerical Calculation Method

In this paper, the aerodynamic effects of high-speed train passing in tunnels are investigated in numerical calculation method of hydromechanics. According to the actual situation of flow filed when the train through the tunnel, the flow geometry model is set up. The flow problem is described by Navier-Stokes equations of unsteady viscous compressible fluid and k-e two equations turbulent model. Thereby the aerodynamic effects of the train through the tunnel are analyzed comprehensively. The changes of the air pressure in tunnel caused by high-speed train entering into the tunnel are mainly analyzed. In addition, the mechanical characteristics of carriages when two train in the tunnel passing through each other are analyzed.

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