船舶主机推进装置-气囊隔振系统是一种有效的减振抗噪装置，而且会对推进轴系对中产生积极的影响，研究船舶推进轴系的校中问题，对于船舶的安全性、动力装置仿真计算、轴系弹性校中计算和轴承受力分析等具有非常重要的理论意义和实用价值。论文以船舶推进轴系为研究对象，基于船舶轴系校中和隔振的理论，利用船舶主机气囊隔振系统，进行轴系校中的理论计算和数值模拟方面的研究。 本文通过理论分析与数值模拟对轴系校中的原理、计算方法、气囊隔振系统的隔振效果进行了研究，主要的工作包括： （1）根据船舶轴系校中及隔振的基础理论，通过计算系统的幅频曲线，对单层隔振系统和双层隔振系统进行对比分析。结果表明双层隔振系统的隔振系数比较低，充分说明双层隔振相对单层隔振具有优良的隔振效果； （2）基于气囊隔振器的基本原理和特性，将气囊隔振器简化为多弹性支承，被隔振物体简化为单质量系统，研究气囊隔振系统的力学特性，建立气囊隔振系统的坐标系和运动微分方程； （3）根据船舶推进轴系校中的有限元法，利用有限元软件建立轴系的有限元模型，对船舶轴系的固有频率和振型进行计算和分析，结果说明轴系振动是耦合振动形式，而不是单纯的扭转或弯曲，并研究了冲击荷载下的位移响应曲线； （4）对加载气囊隔振系统的船舶主机推进轴系进行数值模拟，得出加载气囊隔振器前后的轴承支座位移响应曲线，对比分析表明，气囊隔振器有效的减小船舶推进轴系的横向干扰和支座侧移，提高了船舶主机对中的效果。

Ship propulsion plant of host-air vibration isolation system is an effective device to lower vibration noise and will have a positive impact in propulsion shafting. For ship safety, power plant simulation calculation, shafting elastic centering computing and axle bearing force analysis, the research of ship propulsion shafting alignment problem has very important theoretical significance and practical value. Based on the ship shafting centering and vibration isolation theory and and taked advantage of shipping host air isolation system, the paper made ship propulsion shafting as the research object to research theoretical calculation of shafting certering and numerical simulation. In this article, through theoretical analysis and numerical simulation on the shafting correction principle, calculation method, airbag vibration isolation effect were studied. The main work includes: (1)According to the theory of the ship shafting alignment and vibration isolation, through calculating amplitude-frequency curves of the system, the paper analyzed one layer vibration isolation system and double layer vibration isolation system. Results show that the vibration isolation coefficient of double-layer vibration isolation system is lower which proves that double layer vibration isolation relative single layer has good vibration isolation; (2) Based on the basic principle and properties of the airbag vibration isolator, simplifying the airbag vibration isolator for elastic support, simplifying the vibration isolation objects to the quality system, study mechanical properties of air isolation system, set up air vibration isolation system of coordinate system and the movement differential equation; (3) According to the finite element method in ship propulsion shafting alignment, using the finite element software to establish finite element model, the paper calculated and analyzed natural frequency and vibration mode shaft system of the ship shafting. The results show that the shafting vibration is coupled vibration form rather than a simple twist or bend, and the displacement response curves under impact load are studied; (4) Simulated host ship propulsion shafting of loading airbag vibration isolation system, paper numerically obtained the bearing displacement response curve of loading airbag vibration isolator before and after. Through comparison and analysis, air vibration isolator effectively reduce ship propulsion shafting transverse interference and bearing lateral, improve the effect of the host on the ship.