Hydrodynamic bearings are commonly used to support fast rotating rotors. Due to their nonlinear bearing properties, they strongly influence the rotor response behaviour, which can be observed by the occurrence of sub-harmonic oscillations. The appearance of sub-synchronous vibrations depends on the operating bearing conditions, which are determined by the kinematics of bearing partners, the thermodynamic processes and especially the occurrence of cavitation. In this contribution, the rotor response behaviour of a full-floating ring supported Jeffcott-rotor is investigated under the consideration of lubricant film cavitation. The two-phase model is applied as a mass-conserving cavitation theory and compared with the assumptions of Half-Sommerfeld.

流体动力轴承通常用于支撑快速旋转的转子。由于它们的非线性轴承特性，它们强烈影响转子响应性能，这可以通过发生次谐波振荡来观察。次同步振动的出现取决于轴承的运行状况，这取决于轴承配合件的运动学，热力学过程，尤其是空化的发生。在这一贡献中，在考虑润滑膜气蚀的情况下，研究了全浮动环支撑的Jeffcott转子的转子响应行为。将两相模型用作质量守恒的空化理论，并与Half-Sommerfeld的假设进行了比较。