故障工况下常导磁浮车辆悬浮架载荷特性研究  

Research on load characteristics of levitation chassis of the normal-conducting maglev vehicle under fault conditions

作　　者：曹辉 吴兴文[1] 熊嘉阳[2] 郑雨豪 池茂儒[2] CAO Hui;WU Xingwen;XIONG Jiayang;ZHENG Yuhao;CHI Maoru(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机车电传动》2023年第1期33-41,共9页Electric Drive for Locomotives

基　　金：国家重点研发计划项目(2018YFE0201401-01);国家自然科学基金项目(51805450);中国科协青年人才托举工程项目(2019QNRC001);四川省基础研究计划项目(2020YJ0075)。

摘　　要：针对中低速常导磁浮车辆运行过程中可能出现的故障工况,对悬浮架的载荷特性展开研究。首先根据实际参数建立动力学模型并分析其振动特性,研究了悬浮架构架在电磁铁失效、空气弹簧失效等故障工况下的位移特点;然后分析故障工况下悬浮架的载荷特性,并对悬浮架各部件的强度进行评估。研究结果表明:磁浮车辆的车体与悬浮架通过滑台间接相连,使得振动形式比较丰富;在电磁铁失效故障工况下,悬浮架构架质心的位移相对较大,与轨道碰撞后使得悬浮架载荷发生突变;相对于正常运行工况,左侧电磁铁失效时纵梁的应力最大值增长为原来的3.87倍,左后空簧失效和紧急落车时托臂的应力最大值分别增长为原来的2.59倍和8.11倍。对故障工况下悬浮架的载荷特性进行研究,可以为疲劳寿命计算和结构强度设计提供参考依据。Aiming at the potential failure conditions of the medium and low speed normal-conducting maglev vehicles during operation,the load characteristics of the levitation chassis were studied.Firstly,a dynamic model was established according to the actual parameters and the vibration characteristics were analyzed,to study the displacement characteristics of the levitation chassis under the fault conditions such as electromagnet failure and air spring failure.Then the load characteristics of the levitation chassis were analyzed under fault conditions;the strength of its parts was assessed.The results show that the maglev vehicle body and levitation chassis are connected indirectly by a sliding platform,leading to diversified vibration forms.Under the electromagnet failure condition,the levitation chassis under relatively large displacement at the centroid collides with the track,resulting in a sudden load change of the levitation chassis.Compared with the normal operating conditions,the stress of the longitudinal beam increases by 3.87 times to the maximum when the left electromagnet fails,and the stress of the supporting arm increases by 2.59 times and 8.11 times to the maximum respectively when the left rear air spring fails and the emergency landing occurs.The current study on the load characteristics of the levitation chassis under fault conditions can provide a reference for the fatigue life calculation and structural strength design.

关 键 词：小型中低速常导磁浮车辆 悬浮架 故障工况 载荷特性 应力 轨道不平顺 

分 类 号：U237[交通运输工程—道路与铁道工程]