Abstract
In this paper, it is aimed to model the aerodynamic force acting on a train-set at high speed in tunnel sections. An analytical model of the aerodynamic force is developed from the pressure difference between car-body sides measured on rear vehicles in a test train. The running simulation of 8-car train with using this aerodynamic model shows following results. The simulated car-body vibrations of rear vehicles in a train correspond to the tendency of practical ones. The separation of airflow at the tail end of train increases the yawing vibration of the tail car while it gives little effect on the car-body vibration of adjoining car. And, assumption that the aerodynamic force does not have moving velocity may enlarge car-body vibrations most remarkably.
