Wave effects in a realistic tunnel induced by the passage of high-speed trains
Journal article, 2019
As a high-speed train passes through a tunnel, aerodynamic pressure waves propagate backwards and forward in the tunnel, and they persist for a long time after the train is gone. Understanding the aerodynamic characteristics influenced by various factors on a tunnel is essential for ensuring the safety of tunnel structures. Field measurements were conducted in a 2812 m-long tunnel to systematically investigate the pressure characteristics during the passage of CRH2-150C and CRH380AL high-speed trains through the tunnel, both in single-train and intersecting cases. The results reveal that as the train speed increases, the location of the maximum peak-to-peak pressure variation shifts toward the tunnel entrance, mainly driven by the change in the negative pressure peak. The train length induces significant differences in peak pressures on the tunnel wall in the middle of the tunnel, and a long train brings more massive subsequent pressure waves than a short train in the post-train stage, but they decay faster. The intersection of two trains in the tunnel not only causes a significant change in the peak pressure and its location, but also has a significant effect on damage factor (the damage level on a structure subjected to a specific load) after train leaving the tunnel, with a 65.3% of this factor during trains operating in the tunnel.
High-speed railway tunnel
Field measurement
Damage factor
Wave effect
Post-train stage
Author
Tanghong Liu
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Zhen hua Jiang
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Xiao dong Chen
University of Manchester
Jie Zhang
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Xifeng Liang
Central South University
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Tunnelling and Underground Space Technology
0886-7798 (ISSN)
Vol. 86 224-235Subject Categories
Physiology
Vehicle Engineering
DOI
10.1016/j.tust.2019.01.023