高速列车不同路况横向气动性能仿真研究  

Aerodynamic Characteristics Simulation of High-speed Train Running on Different Infrastructures under Cross Winds

作　　者：龙苏琴 

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201804

出　　处：《机电一体化》2017年第4期3-8,34,共7页Mechatronics

基　　金：国家科技支撑计划(2015BAG19B02);国家科技支撑计划(2015BAG13B01)

摘　　要：以某型号高速列车为研究对象,基于三维、定常流动、不可压缩Naiver-Stokes方程和两方程κ-ε湍流模型,对在横风下不同路况上的高速列车进行数值模拟计算。针对高速列车在路堤上运行的模型,重点研究了路堤高度、倾角和有无挡风墙对列车横向气动性能的影响,并且比较了列车在平地、路堤、路堑和桥梁4种路况上运行的横向气动性能。研究结果表明,路堤高度和倾角越大,列车的横向力和侧翻力矩越大;相比于无挡风墙,列车在有挡风墙的路况上运行时所受横向力和侧翻力矩大大减小;在其他条件相同的情况下,列车在桥梁上所受气动载荷最大,路堤上次之,路堑上最小。To simulate numerically the train traveling on different infrastructures under the conditions of cross-wind, the three-dimensional Naiver-Stokes equations combined with the K-8 turbulent model were solved by means of the fluid analysis software FLUENT. It is necessary to analyze the influence of the height and inclination of embankment and wind shield wall on high-speed train. At the same time, the aerodynamic characteristics of a high-speed train on flat, embankment, cut and bridge were analyzed as well. The results show that the lateral force and overturning moment acting on the train will increase with the increase of the angle and height of embankment. Compared with no wind shield wall, the train takes less aerodynamic force than that with wind wall. The aerodynamic force and moment acting on the train traveling on bridge are the largest, then followed by on embankment, and the train on railway cutting are the smallest.

关 键 词：高速列车 路况 横风 气动性能 数值仿真 

分 类 号：U270.11[机械工程—车辆工程]