强侧风对高速列车运行安全性影响研究

在列车空气动力学和系统动力学相结合的基础上完成了相关研究工作。论文首先在研究列车受侧向风力的气动力特性基础上,利用流体力学计算软件FLUENT进行数值计算,得到不同侧风风速和列车车速下作用于车体的侧风载荷值;接着,利用所建立的高速列车动力学模型,将得到的风载荷值作为外加载荷作用于列车,研究了侧向风速对直线运行列车运行安全性的影响特性;最后,参照高速列车运行安全性相关限定标准,提出不同侧风风速下高速列车的最高安全运行速度,为特殊风环境下我国时速200 km/h及以上动车组安全运行提供理论依据。

Study on the Running Safety of High-speed Trains under Strong Cross Winds

The aerodynamics and vehicle system dynamics are combined in research on the subject of this paper.Making full use of the hydrokinetics and based on an aerodynamic model of a high-speed train in which contains three vehicles,the loads of strong cross winds in different velocities acting on different-speed car bodies of the train are calculated with FLUENT.A high-speed train dynamic model including three cars is established,and the forces and moments of the cross winds are dealt with as the external loads on the train.Through dynamic calculation,the influence of the cross winds on the dynamics of the high-speed train is simulated.With reference to the safe operation criteria for high-speed trains,the maximum safe running velocity of the high-speed train under different-speed side-winds is specified for the first time.It is helpful to safe operation of the high-speed EMUs at and above 240 km/h under special windy circumstances.