The abnormal vibration of the rotating shaft in propulsion system during the startup stage seriously reduces the concealment and safety of the ship navigation. This paper clarifies the rotor-dynamic and vibration performances of a new bearings-rotor coupled system. The rotor-dynamic model and the bearing-rotor coupled dynamic model under different lubrication states are established. The influences of rotating speed, external load, length-diameter ratio and other parameters on the lubrication performances and supporting behaviors of the bearings are analyzed. The variation laws of shaft vibration response under various working modules are revealed. Results of the test and theoretical have good consistency. Results enrich the theoretical system on the analysis and optimum design for such rotating systems.

启动阶段推进系统转轴的异常振动严重降低了船舶航行的隐蔽性和安全性。本文阐明了新型轴承-转子耦合系统的转子动力学和振动性能。建立了不同润滑状态下的转子动力学模型和轴承转子耦合动力学模型。分析了转速、外载荷、长径比等参数对轴承润滑性能和支承性能的影响。揭示了不同工作模块下轴振动响应的变化规律。试验结果与理论具有较好的一致性。研究结果丰富了此类旋转系统的分析和优化设计的理论体系。