中文摘要：

推进轴系的艉轴承负荷受螺旋桨、轴系对中等因素影响，不合理设计或安装可能导致轴承润滑不良，使轴颈与橡胶轴承间容易存在“粘着-滑动”状态，进而导致轴系的弯曲、扭转振动异常。通过简化的推进轴系模型，从机理上分析轴系在艉部橡胶轴承摩擦力作用下的弯一扭耦合振动特性及其主要影响因素，为识别轴系异常振动和噪声提供参考。

英文摘要：

The load state of stem bearing of the propulsion shafting system is affected by the alignment between propeller and shafting. Unreasonable design or poor installation of the shafting system can result in poor lubrication of the robber bearing, which can cause the stick-slip motion between the shaft and the bearing, and abnormal bending and torsional vibration of the shafting system. In this paper, the bending and torsional coupled vibration induced by the friction between the stem bearing and the propulsion shaft was analyzed theoretically based on a simplified propulsion-shafting system. The characteristics of friction induced shaft vibration and noise were revealed.