Motion stability of high-speed maglev systems in consideration of aerodynamic effects: a study of a single magnetic suspension system
查看参考文献34篇
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文摘
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In this study, the intrinsic mechanism of aerodynamic effects on the motion stability of a high-speed maglev system was investigated. The concept of a critical speed for maglev vehicles considering the aerodynamic effect is proposed. The study was carried out based on a single magnetic suspension system, which is convenient for proposing relevant concepts and obtaining explicit expressions. This study shows that the motion stability of the suspension system is closely related to the vehicle speed when aerodynamic effects are considered. With increases of the vehicle speed, the stability behavior of the system changes. At a certain vehicle speed, the stability of the system reaches a critical state, followed by instability. The speed corresponding to the critical state is the critical speed. Analysis reveals that when the system reaches the critical state, it takes two forms, with two critical speeds, and thus two expressions for the critical speed are obtained. The conditions of the existence of the critical speed were determined, and the effects of the control parameters and the lift coefficient on the critical speed were analyzed by numerical analysis. The results show that the first critical speed appears when the aerodynamic force is upward, and the second critical speed appears when the aerodynamic force is downward. Moreover, both critical speeds decrease with the increase of the lift coefficient. |
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来源
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Acta Mechanica Sinica
,2017,33(6):1084-1094 【核心库】
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DOI
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10.1007/s10409-017-0681-8
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关键词
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High-speed maglev system. Critical speed
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Aerodynamic effect
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Motion stability
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地址
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1.
Institute of Mechanics, Chinese Academy of Sciences, Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Chinese Academy of Sciences;;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Beijing, 100190
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Institute of Mechanics, Chinese Academy of Sciences, Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Chinese Academy of Sciences, Beijing, 100190
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School of Civil Engineering, Tianjin University, State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin, 300072
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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0567-7718 |
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学科
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铁路运输 |
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基金
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supported by the National Key Research and Development Program of China
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国家自然科学基金
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the Strategic Priority Research Program of the Chinese Academy of Sciences
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国家973计划
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the State Key Laboratory of Hydraulic Engineering Simulation and Safety (Tianjin University)
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文献收藏号
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CSCD:6139289
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