本文關(guān)鍵詞： 磁浮列車 自激振動 機理分析 仿真驗證　出處：《振動與沖擊》2017年18期 　論文類型：期刊論文

【摘要】：當(dāng)磁浮列車靜止懸浮在某段橋梁上時,磁浮列車的電磁鐵和橋梁會同時出現(xiàn)大幅垂向振動,這種現(xiàn)象被稱為磁浮列車-橋梁耦合自激振動;目前國內(nèi)外對于該問題的研究不夠完善,振動產(chǎn)生的機理認(rèn)識也不夠清楚;同時在工程上,車-橋梁耦合自激振動問題仍未得到很好解決。為此,從三個不同角度來分析車-橋梁耦合自激振動的基本原理;首先建立了單懸浮點-彈性橋梁簡化的耦合模型,并基于此最小耦合模型,從能量傳遞的角度闡述了自激振動的機理,并指出懸浮系統(tǒng)在特定頻段的有源性是導(dǎo)致自激振動產(chǎn)生的根本原因;其次,將橋梁子系統(tǒng)作為整個耦合系統(tǒng)的前向通道,將懸浮子系統(tǒng)視為耦合系統(tǒng)的反饋通道,由此從耦合系統(tǒng)的特征多項式的角度分析了自激振動的機理;最后根據(jù)系統(tǒng)開環(huán)傳遞函數(shù),利用穩(wěn)定性判據(jù)分析了自激振動的基本原理�；谏鲜龇治�,得出了四個有效結(jié)論,為認(rèn)識并解決自激振動問題提供了理論參考;針對構(gòu)建的整個動態(tài)模型,進行了相應(yīng)的數(shù)字仿真分析,仿真結(jié)果驗證了所得出結(jié)論的正確性。
[Abstract]:When the maglev train is suspended on a certain section of the bridge, the electromagnetic and the bridge of the maglev train will simultaneously have a large vertical vibration, which is called the coupled self-excited vibration between the maglev train and the bridge. At present, the research on this problem at home and abroad is not perfect, and the mechanism of vibration generation is not clear enough. At the same time, the problem of vehicle-bridge coupling self-excited vibration is not well solved in engineering. The basic principle of vehicle-bridge coupling self-excited vibration is analyzed from three different angles. Firstly, the simplified coupling model of single suspension point and elastic bridge is established, and based on the minimum coupling model, This paper expounds the mechanism of self-excited vibration from the point of view of energy transfer, and points out that the source of suspension system in certain frequency band is the fundamental cause of self-excited vibration. Secondly, the bridge subsystem is regarded as the forward passage of the whole coupling system. The suspension subsystem is regarded as the feedback channel of the coupling system, and the mechanism of the self-excited vibration is analyzed from the point of view of the characteristic polynomial of the coupling system, finally, according to the open loop transfer function of the system, The basic principle of self-excited vibration is analyzed by using stability criterion. Based on the above analysis, four effective conclusions are obtained, which provide a theoretical reference for understanding and solving the problem of self-excited vibration. The corresponding digital simulation analysis is carried out, and the simulation results verify the correctness of the conclusion.
【作者單位】： 國防科學(xué)技術(shù)大學(xué)機電工程與自動化學(xué)院;近地面探測與感知技術(shù)重點實驗室;
【基金】：國家科技支撐計劃(2012BAG07B01) 國家自然科學(xué)基金項目(11302252)
【分類號】：U211;U441.7

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