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The Influence of Different Geothermal Distributions on the Pressure Transients of High-speed Trains Passing Through Tunnels by Junyan Wang; Zixing Qin; Tiantian Wang; Xudong Tian; Fangcheng Shi; Lei Zhang is a Engineering article available to read on EtoBox.

What is The Influence of Different Geothermal Distributions on the Pressure Transients of High-speed Trains Passing Through Tunnels about?

In this paper, experiments and numerical simulations are used to study the pressure wave transient laws, propagation characteristics and dynamic temperature field changes in tunnels located near geothermal hot springs. To simulate different temperature distributions, areas of 0–80 m, 80–160 m, 160–240 m and 270–350 m are heated, and the tunnel pressure wave peak value and train surface pressure wave peak value are studied accordingly. The research shows that when the heating zone is 0–80 m, the influence on the initial pressure wave is the greatest, the change rate is 8–10 %, and the initial expansion wave change rate is 5–10 %. When the heating zone is 80–160 m, there is little change in the pressure wave peak value in the first and second stages, and the expansion wave peak value is larger than the normal temperature in the third stage. When the heating zone is 160–240 m, the change rate of the pressure wave peak is small. When the heating zone is 270–350 m, there is a negligible change in the initial compression wave and expansion wave peaks in the first and second stages, and the change rate in the third stage is 2–4 %. Moreover, the heating zone located in front of the tunnel

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Author

Junyan Wang; Zixing Qin; Tiantian Wang; Xudong Tian; Fangcheng Shi; Lei Zhang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)