摘要
当高速列车在高寒雨雪地区行驶时,转向架区域容易形成积雪,对高速列车的安全行驶造成威胁。在积雪轨道上行驶的高速列车,其转向架区域积雪中雪粒来源于地面积雪,因此基于壁面切应力,建立风致积雪雪粒运动模型,研究地面积雪中雪粒在列车风作用下的运动情况。采用欧拉-拉格朗日方法,基于雪粒沉积准则,建立转向架区域雪粒沉积边界模型,研究风致雪粒运动情况下转向架区域积雪分布。研究结果表明:高速气流在转向架正下方区域出现高速上扬的现象;转向架区域的车体板件、构架和轴箱等为主要的积雪部位;转向架区域雪粒沉积数量与转向架的位置、雪粒的密度和直径及壁面条件有关。
When high-speed train runs in cold rain and snow area,its bogie area is easy to form snow,whose particles rising upward from the ground threaten the train safety.Therefore,a wind-induced snow particle motion model based on wall shear stress was built for the study of snow particle motion in the ground snow under the effect of train wind.The Euler-Lagrange method was adoted to establish a snow deposition boundary model based on snow deposition criteria,and the resech on the bogie area snow distribution under wind-induced snow particle motion condition was conducted.The results show that the high-speed airflow rises upward at high speed in the area right below the bogie,of which the plate,frame and axle box are the main snow-covered parts,and the amount of snow deposition in the bogie area is related to the location of the bogie,the density and diameter of snow particles and the wall conditions.
作者
聂建
于培师
赵军华
赵凡
NIE Jian;YU Peishi;ZHAO Junhua;ZHAO Fan(College of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;China Aerodynamics Research and Development Center,Mianyang 621050,China)
出处
《机械制造与自动化》
2024年第5期1-7,共7页
Machine Building & Automation
基金
国家自然科学基金项目(11972171)
国家数值风洞工程项目(NNW)
中国博士后科学基金项目(2018M630513)。
关键词
高速列车
转向架区域
积雪
壁面切应力
风致雪运动
high-speed train
bogie area
snow accumulation
wall shear stress
wind-induced snow motion
