Abstract The proposed new rotor support element consists of a hydrodynamic bearing and a magnetorheological squeeze film damper. The damping is controlled by the change of resistance against the flow of magnetorheological fluid due to action of a magnetic field generated by electric current powering the electric coils. This paper deals with the study of the effect of the proposed support element on character of the rotor vibration during rubbing when impacts between the disc and the walls of a hole of square shape in the stationary part are induced. The system is excited by the rotor unbalance. The goal of the analysis is to investigate the effect of the applied current generating magnetic field on regularity of the rotor vibration. The results of the simulations show that the character of the vibration depends on speed of the rotor rotation and application of the current of right magnitude can change irregular oscillation into periodic and reduce magnitude of the impact forces. The proposed support element makes it possible to utilize all advantages of hydrodynamic bearings. The control of the damping effect is very simple as the damper can work only in the on/off regime. The performed study contributes to learning more on the design possibilities of suppression of undesirable phenomena induced by the rotor rubbing.

中文翻译：

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磁敏流体润滑的可控支撑元件对摩擦过程中柔性转子混沌和规则振动的影响

摘要 所提出的新型转子支撑元件由流体动力轴承和磁流变挤压油膜阻尼器组成。由于由为电线圈供电的电流产生的磁场的作用，通过抵抗磁流变流体流动的阻力的变化来控制阻尼。本文研究了所提出的支撑元件对摩擦过程中转子振动特性的影响，当在圆盘和静止部件中的方形孔壁之间产生冲击时。该系统由转子不平衡激发。分析的目的是研究外加电流产生的磁场对转子振动规律的影响。仿真结果表明，振动的特性取决于转子的旋转速度，施加适当大小的电流可以将不规则的振荡变为周期性的，并降低冲击力的大小。建议的支撑元件可以利用流体动力轴承的所有优点。阻尼效果的控制非常简单，因为阻尼器只能在开/关状态下工作。所进行的研究有助于更多地了解抑制由转子摩擦引起的不良现象的设计可能性。阻尼效果的控制非常简单，因为阻尼器只能在开/关状态下工作。所进行的研究有助于更多地了解抑制由转子摩擦引起的不良现象的设计可能性。阻尼效果的控制非常简单，因为阻尼器只能在开/关状态下工作。所进行的研究有助于更多地了解抑制由转子摩擦引起的不良现象的设计可能性。