Abstract
Compression waves are generated and propagate through a tunnel when a high-speed train enters a tunnel. These waves affect a tunnel wall and ride comfort. These pressure changes are complex when two trains pass by each other in a tunnel. Therefore, it is necessary to predict these pressure changes. We did 3-dimentional large eddy simulation that takes account of the viscosity. Thus, we predicted compression waves, expansion waves, pressure changes at a tunnel wall and fluid force acting on a train under condition of the two trains passing by in a tunnel.
