Abstract: The impact of ice load will significantly increase the torsional vibration of the propulsion shafting and worsen the working condition of the components of the propulsion shafting. The lumped parameter modeling and boundary conditions are established for the electric propulsion shafting of an icebreaker. The torsional vibration of the traditional propulsion shafting are compared with that of the propulsion shafting under the impact of ice load by using the Newmar k-β time domain method. It shows that the ice load significantly affects the torsional vibration of the shafting, which should be emphasized. In addition, the sensitivity analysis of the torsional vibration of the shafting is carried out for the coupling stiffness and the clutch inertia of the main components of the shafting. The general rules of the influence of the performance of the main components of the shafting on the torsional vibration of the shafting are obtained to guide the design and selection of the shafting equipment. The results can provide guidance for the shafting design of icebreakers.

Key words: propulsion shafting, ice load, torsional vibration, time domain method, stiffness, sensitivity analysis

摘要： 以某破冰船电力推进轴系为研究对象,建立轴系扭转振动集总参数模型及边界条件分析,采用时域方法,分别对常规推进轴系及冰载荷作用下的推进轴系的扭振特性进行对比分析,说明冰载荷对轴系扭振特性的影响十分强烈,需要进行重点关注;同时,对构成轴系的主要部件中的联轴器刚度、离合器惯量等进行轴系扭振敏感性分析,获得轴系主要部件性能参数对轴系扭转振动特性影响情况的普遍规律,用于指导轴系设备设计和选型。文章对破冰船轴系设计具有一定的指导意义。

关键词: 推进轴系, 冰载荷, 扭转振动, 时域方法, 刚度, 敏感性分析