【摘要】 随着我国高速铁路建设和既有线列车的提速,强风作用下的行车安全问题变得越来越突出。本文首先分析了运行车辆风环境参数,如自然风大小、风向角、列车运行速度等与列车气动力之间的关系,得到了包含这些参数的气动力解析表达式;然后以CRH2列车为例,详细分析单一风环境参数对其他参数及列车气动力的影响;最后在同时考虑多参数的前提下,比较了风环境参数对临界风速的影响。研究成果为深入认识运行列车气动特性和制定提高行车安全的保障措施提供参考与依据。更多还原

【Abstract】 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.更多还原