含腐蚀损伤加筋板的极限强度分析
毕业论文关键词：极限强度；腐蚀位置；腐蚀密度；腐蚀径深；点腐蚀损伤
Abstract Hull structure in severely corrosive environment for too long, it is difficult to avoid corrosion damage. Hull outside due to the strong sunlight, salt spray, the impact of factors such as sea water, marine life, often produces intense electro-chemical corrosion. Due to the cargo, ballast water and oil and other factors, is also a great risk of corrosion inside the hull. After long service in ships and ocean structures, erosion directly affects the stability of the structure, make shipping less security. Due to serious corrosion damage caused countless shipwrecks, which caused pollution of the marine environment, waterways congestion problems should not be underestimated. In the risk assessment of ship and offshore structures in the process of corrosion damage on structure strength is a factor that must be considered. Not only the improving economy and security have important applications, and to guide the ship design and engineering is of great significance. Residual ultimate strength of corroded structures require to study and discuss systematically. Ultimate strength analysis of stiffened plate with corrosion damage, through the experimental study on ultimate strength of stiffened plates of corrosion damage and analysis of effect of pitting corrosion on ultimate strength, and properly assess corrosion ultimate strength of stiffened plates. This paper studied the cargo carried inside the hull, ballast water and oil on the corrosive effect of stiffened plates caused by pitting corrosion pits, using nonlinear finite element method based on Ansys finite element analysis software, systems analysis revealed that corrosion pit location, size, number and depth effect on ultimate strength of stiffened plates respectively.
Keywords: ultimate strength; positions of corrosion; density of corrosion；depth of corrosion；pitting damage
目录
第一章绪论1
1.1研究背景及意义.1
1.2.1均匀腐蚀及其结构强度研究2
1.2.2局部腐蚀（点腐蚀）3
1.3本文主要研究内容.5
第二章评估极限强度的非线性有限元法6
2.1有限元法概述.6
2.2有限元法的基本步骤.6
2.3Ansys有限元分析软件简介.7
2.4Ansys非线性屈曲分析.8
第三章含点腐蚀损伤加筋板模型的建立9