中文摘要：

为了使传统挤压油膜阻尼器的动力特性可控，基于电涡流效应提出了一种新型磁控挤压油膜阻尼器。在一个悬臂柔性转子系统上详细地测量了在不同磁场强度条件下新型磁控挤压油膜阻尼器支撑的转子系统在非旋转状态下的频响函数、在恒定转速下的运动轨道以及在慢加速运行过程中的不平衡响应曲线，并研究了磁控挤压油膜阻尼器对转子系统的振动进行主动控制的可能性．结果表明，通过调整阻尼器间隙中的磁场强度就能够对阻尼器的动力特性进行控制．在设计合理的条件下磁控挤压油膜阻尼器能够显著地抑制转子系统的振动．随着磁场强度的增大，转子系统在各阶共振转速区的振动减小，共振转速向低转速方向移动．在磁场强度工作范围内，磁场强度越大，阻尼器的减振效果越好．

英文摘要：

A novel magnetic field controlling squeeze film damper was presented based on the eddy current effect in order to make the dynamic behavior of conventional squeeze film damper be controllable. The frequency response functions of a overhung flexible rotor system supported on the novel damper in the stationary, the rotor motion orbits at steady state rotational speeds and the unbalance response curves in slowly accelerating operation were systematically measured at different magnetic flux densities. The possibility of the novel damper to actively control the rotor vibration was studied. The results show that the dynamic behavior of the novel damper is easily controlled by adjusting the magnetic flux density in the radial clearance. The novel damper can significantly attenuate the vibration of a rotor system for properly designed case. As the magnetic flux density increases, the rotor vibration in every critical speed region decreases, and the resonant speed shifts to lower rotational speed. In the working region of magnetic flux densities, the bigger the magnetic flux density, the higher the capability of the novel damper to attenuate rotor vibration.