adopted as a result of the limitation from the test and calculation technique. In nature, it cannot reflect the realsituation due to the aerodynamic interference betweentrain and bridge in the condition of the natural wind,resulting from the moving train. In addition, it is possiblethat the time-varying aerodynamic loads on the bridgecan be observed owing to the changing location of thevehicle. However, one essential reason is that the actualwind velocity on the bridge is the wind speed Vw with awind angle of α rather than the resultant speed Vr witha yaw angle of β using an equivalent still model. Basedon all the problems mentioned above, it is necessary tostudy and discuss the aerodynamic characteristics of thetrain-bridge system with a moving train model.