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摘要：吊梁是常用的起重辅助吊具，在海洋平台的建造和运行中扮演者重要的角色，是必不可少的一部分，为了满足平台上的起吊环境和要求，吊梁的种类，形状，以及起吊吨位各不相同，如果在设计过程中采用人工计算结构强度的方法，会增加企业的工作量，耽误项目的进展，并且由于计算精度较低，对安全系数的把握难以到位，则有可能导致更为严重的后果。伴随着计算机的发展，CAD软件与有限元方法交互越来越平易近人，利用高度集成的有限元软件进行吊梁的设计与分析，提高了计算精度和工作效率。

本文中所设计的吊梁在普通单一用途的吊梁基础上进行改良从而通过调整挂载吊耳的位置来实现应对不同质心的海洋平台分段以及海工装备的吊装，采用有限元分析软件Sesam对多用途可调吊梁进行强度校核，通过建立合理的有限元模型，得到了吊梁的应力和变形图，对满足120吨起吊能力的要求进行了验证，保证了吊装的安全性和可靠性。

关键词：多用途吊梁有限元软件强度校核海洋平台分段

Abstract：The lifting beam is a common-used .auxiliary lifting facility which plays an important role in the offshore structure manufacturing industry,a vital thing that can not be excluded.In order to fulfill various lifting requirements and environment,the lifting beams are different from each other in types ,shapes and lifting capabilities.Adopting the manual way to figure out the strength of the structure can consume considerable time with a negative effect on the progress of the project.Besides,the low precision may bring a more serious result.As the development of the computer technology,the combination and connection between cad software and finite element analysis become more and more convenient to perform.The application of these high-tech simulation tools makes the easier and faster.

The lifting beam designed in this paper is based on the common single-used ones ,with a few improvements,the lifting beam will become flexible and easily-changed when it is facing ship sections with different centers of mass.Also it is modeled and calculated by Sesam--a well-known software developed by DNVS.By obtaining the result of the deformed pictures and average stress pictures,it can be proved safe and reasonable.

Keywords:Multiply-used  Lifting  Beam  Infinite  Analysis   Element Strength  check Offshore Structure Section

目录

第一章绪论 1

1.1吊梁应用的目的和意义 1

1.2国内外吊梁设计的现状和问题 2

1.3吊梁的应用与设计 3

1.3.1吊梁的应用介绍 3

1.3.2基于优化理念的吊梁设计 7

1.3.3安全-选择-设计-生产-试验的吊梁设计过程 10

1.4本章总结 16

第二章120吨多用途海工吊梁设计计算 17

2.1引言 17

2.2吊梁设计理论计算 17

2.2.1已知的基本条件 18

2.2.2工况介绍和受力分析 18

2.3吊梁截面尺寸估算以及CAD详绘 20

2.4本章小结 22

第三章120吨多用途海工吊梁有限元强度校核 23

3.1有限元方法和软件介绍 (责任编辑：qin)