把船舶推进轴系描述为螺旋桨、2号中间轴、推力轴承和艇体四部分。对推进轴系—艇体耦合系统的纵向振动功率流和振动能量进行数值计算，研究分析纵向振动功率流传递路径中的各种子系统中2号轴参数、推力轴承参数、艇体参数、螺旋桨质量对功率流传递特性的影响规律。(The ship propulsion shafts are described as 2 parts: propeller, intermediate shaft No. four, thrust bearing and hull body. The longitudinal vibration power flow and vibration energy of the propulsion shafting - Hull coupling system are numerically calculated. The influence of the 2 axis parameters, the thrust bearing parameters, the hull parameters and the quality of the propeller on the transmission and recurrence of the power transmission in the transmission path of the longitudinal vibration power flow is studied and analyzed.)