Abstract：Abstract：Research purposes： The wind loads on the trains are not always cross-wind condition (90° wind yaw angle) due to the effects of air incoming, line structures and terrain conditions. In order to investigate dynamic responses of trains on typical railway bridges under wind loads, coupling vibration analysis of different yaw angles cases on aerodynamic characteristics of vehicle on the high-speed railway bridge was conducted, and the dynamic responses of vehicle were analyzed based on the established wind- vehicle-bridge system model using rigid-flexible coupling method. A 20 spans of 32 meters high-speed railway simply supported beam bridge was taken as the research object. Research conclusions： (1) Drag coefficient of trains decreases with the decrease of wind yaw angle. (2) With the decrease of yaw angle, the lateral force, reduction rate of wheel load, derailment coefficient and lateral acceleration decline. The vertical acceleration has no obvious law, and value of vertical acceleration at the 90° wind yaw angle is the largest. (3) Under the cross-wind condition, each dynamic response is the largest, which leads to the most unfavorable situation for the train operation. (4) The research results can provide a reference for the coupling vibration analysis considering complex air incoming.
2017, Vol. 34 
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