Study on the Safety of High-speed Train in Strong Wind

A certain China railway high speed (CRH) train model, with the ratio of 1∶1, running at 350 km/h in strong wind of different speeds and wind angles is numerically simulated. The aerodynamic forces acting on the train are calculated. The results of computation show that the side force, the lift force and the overturning moment will augment remarkably with the crosswind velocity increasing. Under the action of strong crosswind, the head train suffers from the largest aerodynamic side force and overturning moment, so the head train is easier to overturn. However, the aerodynamic side force and overturning moment acting on the tail train is the least. Moreover, the overturning moment acting on the pantograph and bogies increases obviously with the crosswind speed increasing, which can not be ignored. In the wind angle range of 5° to 90°, the aerodynamic forces acting on various parts of the trains and the wind angle take on the third-party relationships. The analysis results provide helpful reference to catch the aerodynamic forces characteristics under the effect of different crosswind intensity.