摘要船舶推进轴系作为船舶动力的主要传递部件，它的合理设计可以最大限度的发挥 主机的功率以达到最好的效率。推进轴系的设计主要包括轴系的基本数据计算和强度 计算以及轴系校中设计。目前国内外主要是通过船舶建造规范给定的经验公式来计算 轴系的基本数据；轴的强度计算主要是计算出传动轴在静载荷条件下的合成应力，再 引用实际经验所确定的安全系数来考虑动载荷的作用；而轴承的布置和负荷计算则需 要通过校中计算确定各中间轴承和艉管轴承的间距与垂直高度位置，以保证各轴承负 荷在允许范围内并尽可能均匀分布。目前使用的校中方法一般都是这三种：力矩分配 法、三弯矩法以及有限元法，普遍采用的是力矩分配法。这种方法比较成熟而且计算 简单方便，所以本文主要是利用力矩分配法进行合理的校中计算。 83986

根据船舶规范给定的方法计算出轴系的基本尺寸；对传动轴进行强度计算得出的 安全系数大于规定的安全系数，强度校核合格；布置好轴承轴系后进行校中计算，得 出各轴承的影响系数不大，可以按照直线安装；编写 VB 程序计算，计算结果与实际 计算结果一致。 

毕业论文关键词：推进轴系；强度计算；轴系校中；力矩分配法

Abstract Marine propulsion shaft of a ship is the main driving force transmitting member, it's reasonable design can maximize the power of the host in order to achieve the best efficiency。 Propulsion shaft design includes basic data calculated shaft and shaft strength calculation and design。 At home and abroad are mainly given empirical formula  to calculate basic data shaft through the ship construction specifications; strength of the shaft is calculated by computing the main shaft synthetic stress under static loading conditions, and then a reference to the actual experience of the safety factor determined to consider the role of dynamic load; The calculation of load bearing arrangement and you need to calculate and determine the spacing of the vertical height of the intermediate bearings and stern tube bearings by the school in order to ensure that all the allowable bearing loads and evenly distributed as possible within the range。 Alignment methods currently used are generally three: moment distribution method, Three-moment method and finite element method, is widely used moment distribution method。 This method is relatively mature and the calculation is simple and convenient, so this paper is reasonable alignment calculated using the moment distribution method。

Calculated according to the ship specification given method the basic dimensions of the shaft; The shaft safety factor safety factor calculated intensity greater than a predetermined intensity of checking eligibility; After a good layout of the bearing shaft system alignment calculated the each bearing little influence coefficient can be installed in accordance with the straight line; Writing VB program to calculate, consistent results with the actual results。

Keywords: Propulsion   shaft; Strength calculation; Shaft   alignment;   Moment distribution method

目录 

第一章 绪论 1

1。1 选题背景及意义 1

1。2 轴系设计现状及发展 1

1。3 课题主要研究内容 2

第二章 轴系的初步设计 4

2。1 传动轴的材料和组成 4

2。2 轴系的设计要求