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A platform for research: civil engineering, architecture and urbanism
Wave effects of high-speed trains passing through different tunnel lining types
https://orcid.org/0000-0001-5987-179X
Abstract The aerodynamic effects of high-speed trains and the fatigue damage caused by them while passing through tunnels with various lining materials were studied computationally using the three-dimensional, compressible, unsteady Reynolds-averaged Navier–Stokes equations. The numerical calculations were compared with dynamic model tests to verify the accuracy of the numerical model. The results showed that the aerodynamic load decay rates of shield tunnels were significantly higher than those of molded-lining tunnels. Shield tunnels with large blocking ratios can create stronger subsequent cyclic pressure waves than the ones with small blocking ratios, but they decay faster. This is mainly caused by the air viscosity, the nonlinear effect of the compression waves, and the roughness of the tunnel wall. Compared with the integral-lining tunnel, the shield tunnel can effectively improve the micro-pressure wave. The longer the shield tunnel is, the greater the attenuation of the micro-pressure wave becomes. By analyzing the aerodynamic loads on the walls of the shield tunnel, it was revealed that the number of cycles of the aerodynamic load has a linear relationship with the cumulative fatigue damage. When considering the long-term effects of aerodynamic loads, the cumulative fatigue damage can reach 2.63 × 10−4.
Highlights A detailed description of the aerodynamic effects of high-speed trains passing through the shield tunnel lining. The dynamic high-speed rail model test effectively predicted the generation process of the compression wave. Revealed the attenuation law of aerodynamic effects of high-speed trains passing through different tunnel lining structures. The relationship between the number of cycles of aerodynamic load and the cumulative fatigue damage is proposed.
Wave effects of high-speed trains passing through different tunnel lining types
https://orcid.org/0000-0001-5987-179X
Abstract The aerodynamic effects of high-speed trains and the fatigue damage caused by them while passing through tunnels with various lining materials were studied computationally using the three-dimensional, compressible, unsteady Reynolds-averaged Navier–Stokes equations. The numerical calculations were compared with dynamic model tests to verify the accuracy of the numerical model. The results showed that the aerodynamic load decay rates of shield tunnels were significantly higher than those of molded-lining tunnels. Shield tunnels with large blocking ratios can create stronger subsequent cyclic pressure waves than the ones with small blocking ratios, but they decay faster. This is mainly caused by the air viscosity, the nonlinear effect of the compression waves, and the roughness of the tunnel wall. Compared with the integral-lining tunnel, the shield tunnel can effectively improve the micro-pressure wave. The longer the shield tunnel is, the greater the attenuation of the micro-pressure wave becomes. By analyzing the aerodynamic loads on the walls of the shield tunnel, it was revealed that the number of cycles of the aerodynamic load has a linear relationship with the cumulative fatigue damage. When considering the long-term effects of aerodynamic loads, the cumulative fatigue damage can reach 2.63 × 10−4.
Highlights A detailed description of the aerodynamic effects of high-speed trains passing through the shield tunnel lining. The dynamic high-speed rail model test effectively predicted the generation process of the compression wave. Revealed the attenuation law of aerodynamic effects of high-speed trains passing through different tunnel lining structures. The relationship between the number of cycles of aerodynamic load and the cumulative fatigue damage is proposed.
Wave effects of high-speed trains passing through different tunnel lining types
https://orcid.org/0000-0001-5987-179X
Abstract The aerodynamic effects of high-speed trains and the fatigue damage caused by them while passing through tunnels with various lining materials were studied computationally using the three-dimensional, compressible, unsteady Reynolds-averaged Navier–Stokes equations. The numerical calculations were compared with dynamic model tests to verify the accuracy of the numerical model. The results showed that the aerodynamic load decay rates of shield tunnels were significantly higher than those of molded-lining tunnels. Shield tunnels with large blocking ratios can create stronger subsequent cyclic pressure waves than the ones with small blocking ratios, but they decay faster. This is mainly caused by the air viscosity, the nonlinear effect of the compression waves, and the roughness of the tunnel wall. Compared with the integral-lining tunnel, the shield tunnel can effectively improve the micro-pressure wave. The longer the shield tunnel is, the greater the attenuation of the micro-pressure wave becomes. By analyzing the aerodynamic loads on the walls of the shield tunnel, it was revealed that the number of cycles of the aerodynamic load has a linear relationship with the cumulative fatigue damage. When considering the long-term effects of aerodynamic loads, the cumulative fatigue damage can reach 2.63 × 10−4.
Highlights A detailed description of the aerodynamic effects of high-speed trains passing through the shield tunnel lining. The dynamic high-speed rail model test effectively predicted the generation process of the compression wave. Revealed the attenuation law of aerodynamic effects of high-speed trains passing through different tunnel lining structures. The relationship between the number of cycles of aerodynamic load and the cumulative fatigue damage is proposed.
Wave effects of high-speed trains passing through different tunnel lining types
Li, Feilong (author) / Luo, Jianjun (author) / Wang, Lei (author) / Wang, Dengke (author) / Gao, LiPing (author)
2022-03-10
Article (Journal)
Electronic Resource
English
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