论文部分内容阅读
列车运行过程中可能遭遇来自不同方向的强风,为了充分了解和掌握列车在侧风作用下的气动性能,作者以青藏线为工程背景,通过风洞试验,对强侧风下青藏线客车、棚车、集装箱车在桥梁和平地上运行时气动性能进行了测量和分析。结果表明:列车上的侧向力系数和倾覆力矩系数的绝对值随侧滑角的增加而迅速增大;当侧滑角达到一定值时,列车侧向力系数和倾覆力矩系数的绝对值达到最大值,此后,侧向力系数和倾覆力矩系数的绝对值随侧滑角的增加而减小;在同样的运行速度和同样的大风风速下,列车在桥梁上运行比在平地上运行所受到的侧向力系数和倾覆力矩系数大,因而列车在桥上运行也相对较危险。
In order to fully understand and grasp the aerodynamic performance of trains under the action of crosswind, the author may experience strong winds from different directions during the operation of the train. Based on the Qinghai-Tibet line as the engineering background, through the wind tunnel test, The aerodynamic performance of the container truck when it runs on the bridge is measured and analyzed. The results show that the absolute value of the coefficient of lateral force and overturning moment increases rapidly with the increase of side slip angle. When the side slip angle reaches a certain value, the absolute value of lateral coefficient and overturning moment coefficient of train reaches After that, the absolute value of the lateral force coefficient and overturning moment coefficient decreased with the increase of the side slip angle. At the same operation speed and same gale wind speed, the train running on the bridge was more than that on the flat ground The lateral coefficient of force and overturning moment coefficient, so the train running on the bridge is also relatively dangerous.