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Comparative analysis between single-train passing and double-train intersection in a tunnel
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Jianming DU, Qian FANG, Xuan ZHANG, Hualao WANG. Comparative analysis between single-train passing and double-train intersection in a tunnel[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .
@article{title="Comparative analysis between single-train passing and double-train intersection in a tunnel",
author="Jianming DU, Qian FANG, Xuan ZHANG, Hualao WANG",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300339"
}
%0 Journal Article
%T Comparative analysis between single-train passing and double-train intersection in a tunnel
%A Jianming DU
%A Qian FANG
%A Xuan ZHANG
%A Hualao WANG
%J Journal of Zhejiang University SCIENCE A
%V -1
%N -1
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%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300339
TY - JOUR
T1 - Comparative analysis between single-train passing and double-train intersection in a tunnel
A1 - Jianming DU
A1 - Qian FANG
A1 - Xuan ZHANG
A1 - Hualao WANG
J0 - Journal of Zhejiang University Science A
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2300339
Abstract: Aerodynamic pressure significantly impacts the scientific evaluation of tunnel service performance. The aerodynamic pressure of two trains running in a double-track tunnel is considerably more complicated than that of a single train. We used the numerical method to investigate the difference in aerodynamic pressure between a single train and two trains running in a double-track tunnel. First, the numerical method was verified by comparing the results of numerical simulation and on-site monitoring. Then, the characteristics of aerodynamic pressure were studied. Finally, the influence of various train-tunnel factors on the characteristics of aerodynamic pressure were investigated. The results show that the aerodynamic pressure variation can be divided into Stage I: irregular pressure fluctuations before the train tail leaves the tunnel exit, and Stage II: periodic pressure decline after the train tail leaves the tunnel exit. In addition, the aerodynamic pressure simultaneously jumps positively or drops negatively for a single train or two trains running in double-track tunnel scenarios. The pressure amplitude in the two-train case is higher than that for a single train. The PSTP/PSTN (maximum positive peak pressure difference / maximum negative peak pressure difference) increases as train speed rises to the power from 2.256 to 2.930 in Stage I. The PSTP/PSTN first increases and then decreases with the increase of tunnel length in Stage I. The PSTP/PSTN increases as the blockage ratio rises to the power from 2.032 to 2.798 in Stages I and II.
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