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两跨连续梁是磁浮交通工程中常见的结构形式,本文建立了两跨连续梁墩体系有限元模型,分析了约束条件对自振特性影响,进行了列车作用下连续梁动力响应分析,研究表明:轨道梁由简支变连续后各阶自振频率都有所降低;两跨连续梁支座约束布置不对称可导致振动形态复杂;随着列车速度提高轨道梁和车辆响应总体呈提高趋势,两跨连续梁无明显共振现象,车辆振动响应在速度超过250km/h后明显提高。
The two-span continuous beam is a common structural form in the maglev traffic engineering. In this paper, the finite element model of two-span continuous beam pier system is established. The influence of the constraint conditions on the natural vibration characteristics is analyzed. The dynamic response of the continuous beam under the action of the train is analyzed. : The natural frequency of each step of the track beam decreases from simple support variable to continuous; the unsymmetrical constraint of the two-span continuous support can lead to complicated vibration patterns; as the train speed increases, the response of the track beam and the vehicle generally shows an upward trend, Continuous beam without obvious resonance phenomenon, the vehicle vibration response significantly increased after more than 250km / h.