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研究了磁浮车辆与三跨刚构桥之间的耦合振动.考虑主动控制电磁悬浮力的作用,建立了磁浮车辆-桥梁耦合振动分析模型.使用数值方法对车辆通过时桥梁的动力反应进行了分析.结果表明桥梁的梁墩线刚度比宜在2.0到3.0之间.桥梁的动力反应随着桥梁刚度的降低、车速和跨度比的增加而加剧.建议桥梁动力设计中以控制桥梁的冲击系数和振动加速度为主.移动荷载模型和移动质量模型在磁浮桥梁动力设计中均不适用.所得结论可为高速磁浮三跨刚构桥设计提供理论依据.
The coupled vibration of a vehicle with a three-span rigid-framed bridge is studied. Considering the effect of active control of the levitation force, a coupled model of the vehicle-bridge coupling vibration is established. The dynamic response of the bridge is analyzed by numerical method The results show that the rigidity ratio of beam and pier should be between 2.0 and 3.0.The dynamic response of the bridge aggravates with the decrease of bridge stiffness and the increase of vehicle speed and span ratio.It is suggested that in bridge dynamic design, Vibration acceleration.The moving load model and moving mass model are not applicable in the dynamic design of maglev bridge.The conclusions can provide theoretical basis for the design of high speed maglev three-span rigid frame bridge.