西南交通大学学报2025，Vol.60Issue(4)：793-802,10.DOI:10.3969/j.issn.0258-2724.20240470
超导电动悬浮列车明线气动特性及其对悬浮状态的影响
Aerodynamic Characteristics of Open Wire of Superconducting Maglev Train and Its Influence on Levitation State
摘要
Abstract
The design speed of the superconducting maglev train reaches 600 km/h,causing intensified flow around the vehicle body and a sharp rise in aerodynamic loads.To study the train's levitation state under aerodynamic loads,the finite element method was used,and the SST k-ω turbulence model was adopted to calculate the aerodynamic characteristics of a certain type of maglev train under open wire conditions.Additionally,based on these aerodynamic characteristics,a method for extracting aerodynamic loads and loading them in parts was proposed,which could more accurately reflect the dynamic responses under aerodynamic loads.The aerodynamic characteristics of the maglev train indicate that the U-shaped track significantly restricts flow near the vehicle body,making the tail vortex dissipate over a considerable distance within the U-shaped rail.Variations in transverse clearance between the maglev suspension frames and the track lead to the formation of negative pressure beneath the suspension frames.By taking a speed of 600 km/h as an example,the overall extraction of the head train and the middle train generates lift force,while the tail train experiences downforce.Additionally,the lift force is extracted from the individual components of all three vehicle bodies,and the vehicle bodies with lift force values in descending order are as follows:head train,tail train,and middle train.The suspension frames experience downforce,with the pressure amplitude of the first and fourth suspension frames being greater than that of the second and third suspension frames.Although the aerodynamic load force remains consistent across the two extraction methods,the aerodynamic lift amplitude of the vehicle body extracted through partial components is approximately five times greater than that of the whole extraction method.The results of vehicle dynamics under aerodynamic load reveal that the impact of aerodynamic load on suspension frame displacement is minimal,with the maximum height variation being less than 7 mm and showing little difference between the various loading methods.The primary distinction between the two loading modes in terms of dynamics is observed in the variation of the air spring force,where the maximum air spring force in the partial component loading mode is 2.86 times greater than that in the whole loading mode.关键词
磁浮列车/计算流体力学(CFD)/气动荷载/动力学特性Key words
maglev train/computational fluid dynamics(CFD)/aerodynamic load/dynamics characteristic分类
交通工程引用本文复制引用
赵春发,李煜寒,彭也也,杨晶,宁晓芳,冯洋..超导电动悬浮列车明线气动特性及其对悬浮状态的影响[J].西南交通大学学报,2025,60(4):793-802,10.基金项目
国家重点研发计划(2024YFF0508001) （2024YFF0508001）
国家自然科学基金项目(52172375,52402454) （52172375,52402454）
国家资助博士后研究人员计划课题(GZB20230612) （GZB20230612）
轨道交通运载系统全国重点实验室自主课题(2023TPL-T01) （2023TPL-T01）
