中低速磁浮列车双线隧道交会时的气动特性研究  

Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel

作　　者：焦齐柱[1,2] 张铭举 熊小慧 王凯文[3,4] 陈波 JIAO Qizhu;ZHANG Mingju;XIONG Xiaohui;WANG Kaiwen;CHEN Bo(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan,Hubei 430063,China;National&Local Joint Engineering Research Center of Underwater Tunneling Technology,Wuhan,Hubei 430063,China;Key Laboratory of Traffic Safety on Track Ministry of Education,Central South University,Changsha,Hunan 410075,China;National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Central South University,Changsha,Hunan 410075,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]水下隧道技术国家地方联合工程研究中心,湖北武汉430063 [3]中南大学轨道交通安全教育部重点实验室,湖南长沙410075 [4]中南大学轨道交通列车安全保障技术国地联合工程研究中心,湖南长沙410075

出　　处：《机车电传动》2024年第3期61-69,共9页Electric Drive for Locomotives

基　　金：湖南省自然科学基金项目(2021JJ30849)。

摘　　要：为探明速度140 km/h的中低速磁浮列车在双线隧道内交会时隧道壁面和车体表面压力变化情况,文章采用数值计算方法研究了车/隧不同参数对隧道壁面和车体表面气动性能的影响,并对比了不同编组长度的列车和不同隧道净空面积对列车车内压力的影响。研究结果表明,4车编组的磁浮列车在双线隧道中部交会时,隧道壁面测点的压力变化峰峰值与隧道净空面积的1.379次方成反比,车体表面压力测点的变化峰峰值与隧道净空面积的1.231次方成反比。当隧道净空面积为66.2m^(2)时,在气密性指数为0.5s条件下,8车编组列车在隧道内交会引起车内测点的3s压力变化值相较于4车编组列车增加102.2%,而在气密性指数为8s条件下该比例降低至50.4%。文章的研究结果可为中低速磁浮隧道工程建设提供参考依据。In order to investigate pressure variations on both the tunnel wall and train body surface when 140 km/h medium-low-speed maglev trains intersect in two-track tunnels,numerical calculations were performed,focusing on the effects of different parameters of the train/tunnel on the aerodynamic performance of the tunnel wall and train body surface.Moreover,a comparison was conducted across different train consist lengths and various tunnel clearance areas to assess their effects on internal train pressures.The results indicated an inversely proportional relationship between the peak value of pressure variations at measuring points on the tunnel wall and the 1.379th power of the tunnel clearance area,as well as between the peak value of pressure variations at measuring points on the train body surface and the 1.231st power of the tunnel clearance area during the intersection of 4-car maglev trains in the middle section of two-track tunnels.Additionally,under an airtightness index of 0.5 s,the pressure variations over 3 s at measuring points inside 8-car trains resulting from the intersection in tunnels with a tunnel clearance area of 66.2 m^(2) increased by 102.2%,compared with the 4-car scenarios.Under an airtightness index of 8 s,this figure decreased to 50.4%.The study findings of this paper provide a reference basis for the construction of tunnels to accommodate the operation of medium-low-speed maglev trains.

关 键 词：磁浮列车 气动特性 双线隧道 空气动力学 数值计算 

分 类 号：U237[交通运输工程—道路与铁道工程]