摘要：本文提出一种并联安装在船舶轴系上的纵振动力吸振器的设计方法，其中船舶轴系与动力吸振器构成主从系统，实现振动能量在主系统上发生转移，实现抑制主系统共振的目的。首先对船舶轴系的纵向振动进行固有频率和模态分析，其次采用模态截取和模态综合法建立了考虑船舶轴系作为弹性连续体情况下的轴系-动力吸振器混合动力学系统模型，最后给出从螺旋桨激励力传递到推力轴承基座端的动力放大系数解析式，并对动力吸振器的设计参数影响规律进行研究，为减小船舶轴系纵向振动的动力吸振器设计提供了理论依据。

Abstract: Design of a dynamic absorber connection to ship shafting in parallel is introduced in this paper. The ship shafting and dynamic absorber constitute the master-slave system to realize the vibration energy transfer from the primary system and achieve the purpose of inhibiting the primary system resonance. Firstly, calculate the nature frequencies and model shapes of ship shafting; secondly, use the modal interception and synthesis method to set up ship shafting-dynamic absorber mechanical system, considering the ship shaft as a flexible continuous one; finally, provide with the dynamic amplification analytic formula from the propeller excitation to the foundation of thrust bearing and analyze the axial vibration influenced by dynamic absorber parameters. It provides with a theoretical basis to design a dynamic absorber for reducing axial vibration of ship shafting.