摘要
应用平原大气边界底层速度型,对平原上运行速度为120 km/h的集装箱列车在横风角为90°8~12级横风下的空气动力载荷进行数值研究。研究对象分别为机车牵引装载着12.192 m（40英尺）集装箱的3辆NX70型平车和3辆X6K型平车的计算模型。结果表明,平原上X6K型平车装载集装箱所受升力的平均值约为NX70型平车集装箱的25%左右;2个列车模型中位置相同的集装箱所受侧向力基本相等,集装箱所受翻滚力矩约为NX70型平车集装箱的60%左右。铁路集装箱车辆的设计对其在平原上装载集装箱所受升力的影响很大,对集装箱所受侧向力的影响很小;集装箱平车底架的大面积空隙有利于列车底部和集装箱底部之间的空气流通,可有效降低集装箱所受升力和翻滚力矩;合理的铁路车辆设计可在一定程度上提高平原上集装箱车辆运行的横风稳定性。
The velocity profile of the atmospheric boundary layer was used for numerical study on the aerodynamic loads of container trains running at a speed of 120 km/h on a plain and under a crosswind of 8~12 Beaufort scale with a 90° wind angle.The objects of study were the computational models consisting of locomotives hauling 3 NX70 type flat cars and 3 X6K type flat cars respectively,both carrying 12.192 m（40 feet）containers.Research results indicate as follows： On plains,the average lift force acting on the 3 containers on the X6K type cars is about 25% of that acting on the containers on the NX70 type cars,side forces acting on containers of the same formation order are basically equal,and roll moments acting on the containers on the X6K type cars are about 60% of those acting on the containers on the NX70 type cars;for trains running on plains,the design of container cars has a strong effect on the lift force onto the container and a little effect on the side force onto the container;large-area spacing on the underframe of the container car is favorable to air flow between the container bottom and the car bottom,which reduces the lift force and roll moment onto the container effectively;rational design of container cars may improve the crosswind stability of the cars carrying containers while running on plains.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2011年第3期17-22,共6页
Journal of the China Railway Society
关键词
列车空气动力学
横风稳定性
列车倾覆
数值模拟
集装箱列车
train aerodynamics
crosswind stability
train overturning
numerical simulation
container train
