A Generalized Numerical Simulation Method for Pressure Waves Generated by High-Speed Trains Passing through Tunnels

Yuan-gui, Mei

doi:10.1260/1369-4332.16.8.1427

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…3) Compressible unsteady homentropic flow model with frictional effect [11,18] ; 4) Compressible unsteady non-homentropic flow model [12,13,19,20].…”

Section: -D Flow Modelmentioning

confidence: 99%

Numerical Simulation of Pressure Wave in Railway Tunnel Caused by Two Trains Crossing

Ding¹,

Tian²,

Du³

et al. 2017

dtetr

Self Cite

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When high-speed trains pass through tunnels, especially in two trains crossing condition, it causes severe pressure fluctuations. The pressure fluctuations entered into the coaches may make passengers to suffer from aural discomfort. In addition, the internal and external pressure wave will also bring fatigue damage to vehicle body and parts. Although we can avoid the tunnel crossing case through traffic planning and operation, but in the line with large number of long tunnels or in the busy main line, the tunnel crossing case is an inevitable problem. Therefore, it is useful to accurately predict the pressure wave in railway tunnel caused by two crossing trains.Based on the one-dimensional compressible unsteady non-homentropic flow model, a mathematic model describing the pressure wave caused by two trains crossing is established, and a high-precision fast numerical method is established through the method of characteristics of generalized Riemann variables. After verification by the results from moving model rig, a new domestic high-speed EMU is taken as an example to study the effect of tunnel length, train speed and length on the maximum positive and negative pressure change. The results can be used as basic aerodynamic load for fatigue design of the body and components of high-speed train.

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“…3) Compressible unsteady homentropic flow model with frictional effect [11,18] ; 4) Compressible unsteady non-homentropic flow model [12,13,19,20].…”

Section: -D Flow Modelmentioning

confidence: 99%

Numerical Simulation of Pressure Wave in Railway Tunnel Caused by Two Trains Crossing

Ding¹,

Tian²,

Du³

et al. 2017

dtetr

Self Cite

View full text Add to dashboard Cite

show abstract

“…The pressure wave generated by train operation is affected by many factors [14][15][16][17]. Among them, the shape of the front of the subway train greatly influences the amplitude of the pressure wave in the tunnel [18][19].…”

Section: Introductionmentioning

confidence: 99%

Model Test Research on Pressure Wave in the Subway Tunnel

Fang

Zhou

et al. 2020

Preprint

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The pressure wave is of crucial importance for subway development since it greatly influences the comfort while taking. As the subway lines are rapidly developing in the cities, the pressure wave in different subway tunnel constructures is urgently needed to be studied and receded. In this paper, a subway tunnel pressure wave experimental system was designed, constructed, and tested. The influence of train model head shape, train model speed, shaft number in the tunnel, and bypass number in the tunnel on the pressure wave amplitude were experimented with and analyzed. The results show that the train model head shapes significantly impact the amplitude of the initial compression wave in the tunnel. The blunter train model head generates a greater amplitude of the initial compression wave. When the train passes through a single-track tunnel, the maximum positive pressure amplitude of the pressure wave in the tunnel is at the first compression wave at the tunnel entrance. The maximum negative pressure value in the tunnel is at the superposition of the initial compression wave reflected from the first time and the train's body, which is related to the length of the train's body, tunnel length, train's speed, and sound speed. The shaft set in the tunnel decreases the amplitude of the initial compression wave in the tunnel space behind, but it will increase the pressure wave's amplitude reflected in the tunnel when the train passes through the shaft. After the bypass tunnel is added, the initial compression wave propagation in the tunnel behind the bypass tunnel is receded. Still, it also increases the negative pressure amplitude when the train passes.

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“…Aradag 6 used it to simulate air flow in tunnel systems by focusing on the effect of ventilation shafts. Mei 7 used a method to predict the pressure waves caused by a single high-speed train or two crossing trains in a tunnel.…”

Section: Introductionmentioning

confidence: 99%

Use of artificial neural networks for the prediction of time-dependent air speed variation in metro stations

Koc¹,

Sert

Albayrak

2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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In this study, the time-dependent, induced air speeds at critical sections of underground metro stations are assessed using a novel one-dimensional data-driven approach. For this purpose, three artificial neural networks are used, each trained for the most basic configuration of a single train moving in a single tunnel. The first two are trained to provide the maximum and time averaged values of the induced air speeds while the train is moving inside the approach tunnel or the station. The third one is used to simulate the time-dependent air speed variation during train stoppage and departure. Typical structures of a metro system such as staircases and ventilation shafts are introduced into the solution using simple analytical relations based on loss coefficients. The developed approach is tested using two different metro stations that are currently in operation in Turkey. The selected stations are constructed using different tunneling techniques resulting in different air flow characteristics. The results show that the time variation of the air speed predicted by the developed model is, in general, in good agreement with the results of the Subway Environmental Simulation software, although further studies are necessary to model the acceleration and deceleration of trains more realistically.

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A Generalized Numerical Simulation Method for Pressure Waves Generated by High-Speed Trains Passing through Tunnels

Cited by 14 publications

References 10 publications

Numerical Simulation of Pressure Wave in Railway Tunnel Caused by Two Trains Crossing

Numerical Simulation of Pressure Wave in Railway Tunnel Caused by Two Trains Crossing

Model Test Research on Pressure Wave in the Subway Tunnel

Use of artificial neural networks for the prediction of time-dependent air speed variation in metro stations

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