毕业设计(论文)题 目 高速磁浮车辆车桥耦合机制讨论 摘 要为了讨论高速磁浮车辆的车桥耦合机制，利用刚柔耦合动力学建模技术，建立车桥耦合模型，分析了道梁挠度对磁浮关系稳定性的影响，悬浮框架自振条件及车桥耦合机制。不同车速下高速磁浮车的悬浮单元与道桥耦合仿真表明：高架道桥挠度摄动不会影响磁浮关系的稳定性，道桥挠度对磁浮关系的影响主要表现在悬浮气隙波动方式上，所以要对悬浮气隙进行均值调整；由于悬浮模块与悬浮框架的搭接结构，悬浮框架具有产生高频自振的力学条件。磁浮车辆的三级悬挂，即电磁悬挂、一系悬挂（橡胶悬挂）和二系悬挂（摇枕空簧）。针对磁浮车机械电磁耦合的特别性，三系悬挂中电磁悬挂和一系机械悬挂的固有频率应尽可能错开，避开引起轨道共振，同时为改善电磁悬挂系统线性程度，在主动悬挂控制器设计上应可能增大低频回路增益。另外，控制器的低频回路增益等参数情况影响车体垂向加速度振动幅值。不同车速范围内，气动脉冲频率的改变直接影响人体乘车舒适性。关键词：高速磁浮车辆 车桥耦合机制 道桥挠度 悬浮框架 ABSTRACTIn order to investigate the coupling mechanism problem between vehicle and bridge of high-speed maglev vehicle, vehicle-bridge-coupling system was modeled using rigid-flexible coupling dynamic modeling technique, and the influence of guideway beam deformation upon the stability of maglev element was analyzed, self-excited vibration condition of the levitating frames and coupling mechanism problem between vehicle and bridge were analyzed，too. The coupling simulations between Maglev elements and guideway beams at different speeds show that the perturbation of elevated guideway beam’s deformation does not affect the stability of Maglev element. Due to the guideway beam’s deformation influence upon Maglev elements lie mainly in the ways of Maglev gap variation, the Maglev gap is adjusted averagely under the active guiding control. According to the joining-construction between Maglev modules and levitating frames, the levitating frames have the mecham...
