复合材料毕业论文.doc

复合材料毕业论文题目 复合材料毕业论文 题目 复合材料结构的概率损伤容限设计方法研究 摘要 随着先进复合材料在飞机上的广泛应用，由于变量的随机性和安全系数的保守性，确定 性方法已经无法满足设计要求，从而我们采用概率设计的方法，将结构安全程度定量化。 本文是建立在国内外的参考文献的数据基础之上，对四人概率设计方法之一的概率损伤 容限设计方法（TsAGI方法）进行研究。使用MATLAB语言编程模拟概率损伤容限设计，通 过蒙特卡罗方法计算复合材料飞机结构的失效概率。以Mig-29垂直尾翼为例进行详细的分析 和编程计算。接着在通过使用商业有限元软件ANSYS,对-?个带孔的复合材料层合板，使用 参数化设计语言（APDL）和概率设计模块（PDS）,在随机输入变量的情况下，计算此板的 失效概率。其戸的是为了说明用ANSYS有限元软件分析结构的可靠性是可行的。最后还阐 述了此方法的优缺点和以后的研究工作内容和方向。 关键词：概率损伤容限设计，PDS, TsAGI方法，蒙特卡罗 Abstract As advanced composite materials arc widely used in the aerospace structures, because of the random of variables and the conservative of safe factor, the deterministic design analysis cannot meet the design requirements. We adopt the method of probability design, which quantifies structural safety degree. This article is on the base of the domestic and foreign related data, one of four probability methods is Probabilistic Design of Damage Tolerant method, that is the method of TsAGI. Firstly, using MATLAB simulates probabilistic design of damage tolerant, and the failure probability of the composites of aircraft structure is calculated with the Monte Carlo method, for example Mig-29 fin. Secondly, through the use of commercial finite element software ANSYS, in composite skin with hole, the use of parametric design language (APDL) and probabilistic design module (PDS) with random input variables, the failure probability is calculated? Its purpose is that it is feasible using ANSYS finite element analysis software to analyze reliability of structure. Finally, the advantages and disadvantages of the method are expounded and the content and the direction of research in future arc given. Key words： Probabilistic Design of Damage Tolerant, PDS, the method of TsAGI, MENTE CARLO 目录 TOC \o 1-5 \h \z HYPERLINK \l bookmark2摘要 ii HYPERLINK \l bookmark4Abstract iii HYPERLINK \l bookmark101.1研究背景 ?1? HYPERLINK \l bookmark121.2国内外研究现状 -1 - HYPERLINK \l bookmark141.3本文的研究工作 -2- HYPERLINK \l bookmark16第二章 复合材料结构概率损伤容限设计方法（Ts