Effect of wind environment parameters on aerodynamic characteristics and critical wind velocity of vehicle operation

With the construction of high-speed lines and speeding up of trains on existing railways in China, the safety of vehicle operation under strong winds becomes more and more significant. In this paper, analysis on the relationship between aerodynamic force of a train and parameters of complicated wind environment such as natural wind velocity, wind direction and running speed of vehicle was done firstly, and analytical expression of aerodynamic force expressed by these parameters was obtained, correspondingly. Secondly, in the case of CRH2, the effects of each of the wind environment parameters on the other parameters and aerodynamic force of the train were analyzed in detail. Finally, with multi-parameters being considered simultaneously, the influence of wind environment parameters on critical wind velocity was analyzed. The results of present study are expected to provide reference and basis for further insight into the aerodynamic characteristics of vehicle operation and development of appropriate measures to improve the safety of vehicle operation. ©, 2015, Science Press. All right reserved.