Abstract
When a train travels through a tunnel at high speed, large pressure variations are generated in the tunnel. It is essential to accurately predict these pressure variations when planning to increase the speed of Shinkansen. To estimate the pressure variations by train passage through a tunnel, scale model launching experiments using an axisymmetric model and an actual shape model have been conducted. Moreover, numerical simulation has been developed to predict the pressure variations. As a result, it is shown that the pressure variations are approximately inversely proportional to the square of the distance from the train center. The numerical simulation results agree well with the results of model experiments.
