Characteristics of pressure waves along high-speed Maglev trains in railway tunnels and comparison of fatigue strength requirements according to different standards

Artikel i vetenskaplig tidskrift, 2023

The aerodynamics of railway trains and tunnels were studied by using N-S equations and SST k-ω turbulence model. The results indicate that the train surface pressure amplitudes when high-speed trains are travelling at 500-800 km/h in a tunnel show a tendency to increase along the train, while the amplitudes intersecting in a tunnel were relatively close at the front and rear of the train, with fluctuations in the uniform section. When a train passed through the tunnel, the negative peak value and amplitude of the pressure wave acting on the train body exhibited linear relationship with the train speed, whereas when two trains met in the tunnel, the positive peak value, negative peak value, and amplitude were proportional to the 2.8, 2.5, and 2.6 power of the train speed. Finally, the characteristics of the International Union of Railways (UIC) and Japanese Industrial Standards (JIS) were compared and studied.