导　　师： 王志瑾

学科专业： 082501

授予学位： 硕士

作　　者： ;

机构地区： 南京航空航天大学

摘　　要： 复合材料在飞行器结构设计领域得到越来越广泛的应用，而航空航天结构由于种种需要，无可避免地需要对结构进行开口。因此，复合材料开口补强问题成为设计人员关注的重要问题。在该领域，国内外研究者已经开展了相应的研究。目前对于开口补强的研究主要采用理论分析结合试验验证的方法。研究的内容多为单一的开口型式，单一的补强方法，单一的补强材料，并且只进行了单一工况下的试验验证。对于不同开口型式、不同补强材料、不同载荷作用下，复合材料开口层合板最优补强方案的选择仍没有一套系统的参照。 本文对包含不同开口形状的复合材料层合板选取不同补强材料、补强型式，并在不同载荷作用下对开口补强进行了设计分析。根据不同优化设计方案下的补强参数，选取适当的设计变量，以结构重量为目标函数进行了优化设计。采用多级优化方法，将复杂的结构优化问题，拆解为多个相对简单的子优化问题进行求解。最终给出复合材料层合板不同开口型式下的最优化补强方案。优化结果显示最优化方案减重效果显著，本文给出的最优化方案选择具有一定的工程实际应用价值，可以用于解决其他结构开口的补强设计问题。 Composite materials are finding increasing application in the field of fight vehicle structuraldesign. In order to meet the requirements, open-holes are inevitable in structures. Thus, the problemof composite open-hole strengthening has been concerned by designers all the time, and a lot ofeffective work in this area has been carried out both at home and abroad. The main research method isthe combination of theoretical analysis and experimental verification. At present, the research ismainly focused on single open-hole strengthening, using one kind of strengthening method andmaterial. Besides, experimental verification has only been conducted with reinforced laminatesubjected to single load case. As a result, there is no systematic reference for the optimization ofcomposite open-hole strengthening design, especially for composite laminates with different types ofopen-holes, using different kinds of strengthening methods and materials. In this paper, two kinds of composite laminates with different open-holes are selected as theobject of design and analysis. Two materials, three strengthening types are chosen for the open-holestrengthening subjecting to three different load cases. After analyzing parameters in different solutions,optimization design was conducted, aiming at finding a minimum structural weight. At the same time,the multi-level optimization method was adopted to decompose complex structural optimizationproblem to several relatively simple optimization of sub-problems. The optimum solution forcomposite open-hole strengthening was given in the end. The result shows that the optimum solutioncontributes a lot to weight loss. In a conclusion, method provided in this paper for the optimizationdesign of composite open-hole strengthening has practical value in engineering application, which canbe used to solve the problems of other structural open-hole strengthening.

关 键 词： 复合材料 开口补强 响应面 多级优化 代理模型

分 类 号： [V261.97]

领　　域： [航空宇航科学与技术]