Abstract
When a train travels through a tunnel at high speed, large pressure variations are generated in the tunnel. It is thus essential to accurately predict these pressure variations when planning to increase the speed of Shinkansen. Model experiments are effective in investigating pressure variations. In the model experiments, we used axisymmetric train models, because the train model is launched by friction drive consisting of some pairs of vertically aligned wheels. However, train models similar to real shape need to be used to estimate more accurately the pressure variations by train passage. For this purpose, we have developed the launcher which can shoot a real shape train model at the maximum speed of 250km/h by rotating wheels. The pressure variations measured in model experiments using real shape train and tunnel models agree well with the results of field measurements.
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