In order to reveal the abnormal vibration of a newly developed 200 km/h medium-speed maglev vehicle with mid-mounted permanent magnet linear synchronous motors at specific speeds, field vibration tests at different running speeds are carried out and analysed in this paper. The accelerations of the linear motor and levitation module were measured during powered running as well as idle running. Data analysis indicates that the vertical and longitudinal forced resonance of the PMLSMs result in the abnormal vibrations. The idle running tests imply that the excitation force comes from the vertical attraction force between the permanent magnets of the motor and steel sleepers. These results point out the direction of dynamic optimisation of the bogie.

为揭示某新研制的中置永磁直线同步电机200km/h中速磁悬浮车辆在特定速度下的异常振动，本文进行了不同运行速度下的现场振动试验并进行了分析。在动力运行和怠速运行期间测量线性电机和悬浮模块的加速度。数据分析表明，永磁同步电机的垂直和纵向强制共振导致异常振动。空转试验表明激振力来自电机永磁体与钢枕之间的垂直吸引力。这些结果为转向架的动态优化指明了方向。