【作者】 章宏令；

【导师】 周哲波；

【作者基本信息】 安徽理工大学 ， 机械制造及其自动化， 2011， 硕士

【摘要】 本文在介绍超高压容器的概况和论述自增强技术国内外发展概况的基础上,采用弹塑性力学分析方法较为全面地阐述了理想弹塑性材料模型、应变硬化材料模型、考虑鲍辛格效应材料模型的超高压自增强容器应力计算公式,介绍了厚壁圆筒温度应力的估算方法。基于厚壁圆筒的应力最佳状态为目标,通过“最优化”设计方法建立其优化设计模型,并利用MATLAB软件编制了优化设计程序,开发出厚壁自增强圆筒优化设计人机界面。该程序具有人机对话功能,在程序运行界面中输入初始结构参数并选择操作参数,通过点击按钮运行优化程序,获取优化结果,并有计算具体点应力、显示应力分布图和强度校核等功能,较以往的确定自增强弹-塑性界面半径的方法,计算和收敛速度快,结果直观准确可靠,具有较强的可视化功能,计算结果易于保存和比较。采用有限元法对超高压自增强容器进行应力分析,利用ANSYS软件作为分析工具,通过反应器未作自增强处理与自增强处理的应力分析比较及其温度应力的分析,验证了超高压自增强容器具有高弹性承载能力、低平均应力和循环应力幅、应力沿壁厚方向分布更加均匀及材料的利用率较高等优点,另外内加热方式可以使其圆筒内壁应力降低,筒体的应力分布趋向均匀。较以往的手工分析,该方法具有分析效率高、分析范围广、分析结果更直观等优点。有限元法和最优化设计方法与传统的解析法相比,其分析结果更精确,更接近真实值,且分析的范围也更广。应用计算机辅助设计技术对厚壁自增强圆筒进行了程序设计、应力分析和比较,采用有限元分析方法得出的结果更接近实际工况,且验证了部分自增强理论。图39表6参60更多还原

【Abstract】 Based on analyzing and discussing the overview of ultra-high pressure vessel and the development of autofrettage technology in abroad and domestic,ultra-high pressure autofrettaged vessel’s stress formula of the the elastic-perfectly plastic material model, strain hardening material model and considering the Bauschinger effect material model were overviewed more comprehensive, and the thick-walled cylinder thermal stress’estimation method was introduced.Thick-walled cylinder’s optimal design model was built through the ’optimization" design method, and its optimal design program was compiled by MATLAB software.Based on the thick-walled cylinder’s best stress, the optimal design humane-machine interface of thick-walled cylinder was developed.This program has the man-machine dialogue function, optimal results were obtained on condition that the initial structural parameters were entered, the operating parameters in the running program interface were selected and the optimal design button was pressed.In addition,the program has the function of calculating specific point stress showing stress distribution and checking strength. It has faster computation, convergence speed, and more visual reliable accurate results, and stronger visualization function than the determination method of the elastic-plastic interface radius in the past, moreover the results is easier to store and compare.Ultra-high pressure autofrettaged vessel’s stress was analysed by using the finite element method. With analytical tool of ANSYS software, the reactor’s stress of not autofrettage processed and autofrettage processed were comparatived and thermal stress were analysed. The advantages of ultra-high pressure autofrettaged vessel were verified, for example higher elasticity carrying capacity, lower mean stress and cyclic stress amplitude, more uniform stress along the thickness direction, higher material utilization and so on. In addition, the inner heating thick-walled cylinder’s wall stress can be reduced and the cylinder’s stress is more uniform. The finite element method has higher analysis efficiency, wider analysis range and more intuitive than manual analysis in the past.According to be compared the finite element method and’optimization’design method to traditional design methods, the results were more accurate and closer to realistic value, and the analysis scope were broader. Base on being applied computer aided design technology, the program was designed, and the stress was analysed. Aimed at thick-walled autofrettaged cylinder and the conclusion are closer to actual working condition by using the finite element method. A part of autofrettage theory was verified.Figure 39 Table 6 Reference 60更多还原