土木工程学报  2019, Vol. 52 Issue (8): 81-90    
  桥梁工程 本期目录 | 过刊浏览 | 高级检索 |
中低速磁浮列车-桥梁系统竖向耦合振动#br# 理论分析与试验验证
王党雄  李小珍  梁  林
西南交通大学,成都 610031
Theoretical analysis and experimental verification of the vertical coupling vibration of low-to-medium speed maglev train-bridge system
Wang Dangxiong  Li Xiaozhen  Liang Lin
Southwest Jiaotong University, Chengdu 610031, China
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摘要 为探讨中低速磁浮列车-桥梁系统竖向动力相互作用特性,文章将中低速磁浮列车进行两种方式的简化,考虑PID主动悬浮控制系统,基于模态叠加法,建立2种类型的中低速磁浮列车-桥梁系统竖向耦合振动分析模型。随后基于长沙中低速磁浮运营线桥梁动载试验,对建立的2种仿真模型进行对比与验证。基于仿真模型2,以不同梁高的桥A、桥B、桥C为研究对象,对中低速磁浮列车-桥梁系统耦合振动特性进行分析。研究表明:将磁浮列车简化为均布荷载的方式能较为准确的模拟实际状况;桥梁刚度的减小会导致作用于车辆和桥梁上的电磁悬浮力增大,使得车体和桥梁的动力响应变大;磁浮列车低速运行时悬浮力频谱分布较离散,而正常速度运行时较集中;中低速磁浮列车-桥梁系统竖向存在着由电磁悬浮力自身频率引起的共振现象,该共振频率较低。
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王党雄 李小珍 梁 林
关键词 中低速磁浮列车桥梁模型验证竖向动力相互作用共振    
Abstract:In order to research the vertical dynamic interaction of low-to-medium speed (LMS) maglev train-bridge system, this study establishes two types of coupling vibration analysis models for LMS maglev train-bridge system based on two simplified maglev train models, considering (proportional–integral–derivative) PID active suspension control system and modal superposition method. The simulation models were compared and verified based on the bridge dynamic filed test in Changsha LMS maglev commercial line. Based on the simulation model of no.2, the vertical coupling vibration characteristics of LMS maglev train-bridge system were analyzed though the bridge A, B and C with different heights of girder. The research shows that simplifying the maglev train to a uniform load model can accurately simulate the actual situation. The decrease of bridge rigidity may lead to the increase of electromagnetic levitation force acting on the vehicle and the bridge, as well as larger dynamic responses of the maglev train and the bridge. The spectrum distribution of the levitation force for low-speed running is discrete, and its distribution for normal-speed running is concentrated. The resonance of LMS maglev train-bridge vertical system can be induced by the self- frequency of the levitation force, and the resonance frequency is relatively low.
Key words low-to-medium-speed maglev train    bridge    model verification    vertical dynamic interaction    resonance
    
引用本文:   
王党雄 李小珍 梁 林. 中低速磁浮列车-桥梁系统竖向耦合振动#br# 理论分析与试验验证[J]. 土木工程学报, 2019, 52(8): 81-90.
Wang Dangxiong Li Xiaozhen Liang Lin. Theoretical analysis and experimental verification of the vertical coupling vibration of low-to-medium speed maglev train-bridge system. 土木工程学报, 2019, 52(8): 81-90.
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http://manu36.magtech.com.cn/Jwk_tmgcxb/CN/     或     http://manu36.magtech.com.cn/Jwk_tmgcxb/CN/Y2019/V52/I8/81
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