压力容器大开孔强度有限元分析研究.docVIP

毕业设计论文 类 型： 毕业设计论文 题 目： 压力容器大开孔强度有限元分析研究 指导教师： 王磊 学生姓名： 支林林 专 业： 机电一体化（自动化生产设备） 班 级： 机电083 学 号： 080101338 时 间： 2011 年 4 月 压力容器大开孔强度有限元分析研究 摘要 随着生产的发展和科学技术的不断进步，炼油、化工、化肥等装置不断向着高参数(高温、高压)、大型化的方向发展，原有的以经验公式为基础的常规设计方法(Design by Rules)已经不能满足需要。以应力分析为基础的设计变得越来越重要。有限单元法(Finite Element Analysis)已成为结构分析最重要的一种手段。 压力容器常常需要开设各类大开孔结构，这是由其工艺及结构要求而定，而大开孔结构超出了常规设计方法的适用范围，只能依靠实验研究，其安全性和可靠性只能保守估计。因而应力分析为基础的设计方法变得越来越重要，有限元分析法已成为结构分析最重要的一种手段。 本文采用有限元方法，应用ANSYS程序，在软件中建立三维模型，按照分析设计的原则和方法，对大型薄壁压力容器大开孔补强结构进行弹性应力分析，得到补强结构的应力分布特点，并对接管补强结构，进行一系列建模分析，通过研究发现，等效线性化处理是区分有限元计算结果正峰值应力的有效手段，只要选择合适的校核进行正确的应力线性化，可以分解出峰值应力的大小，与有限元计算结果基本一致。 关键词：压力容器、开孔补强、三维有限元、等效线性化 Abstract With the development of production and the improvement of science and technology, oil refining, chemical, fertilizer etc device constantly toward high parameter (high temperature, high pressure), large-scale direction, the original based on empirical formula of conventional design method (Design by Rules) cannot meet the needs. The design of stress analysis based on is becoming more and more important. Finite Element method has become the most important structure Analysis of a kind of means. Due to the requirements of techniques and structure, Pressure Vessels often need to include larger openings of various types which goes beyond the application of Design by Rules. What can be done is to try to design by making comparative analysis through experiments and experience, which results in unassured security and reliability. Thus the design based on analysis of stress become increasingly important and the Finite Element Analysis has been considered the most important means to the structural analysis. In this paper, use the ANSYS finite element method, the software program established in accordance with the 3d model, principles and methods of analysis and design of large thin-walled pressure vessel, big opening reinforcement structure is analyzed and the elastic stress forcomposites.reinforcement structure of