超高压厚壁容器中的自增强机理的研究

发布时间：2018-05-07 22:39

本文选题：自增强技术 + 厚壁圆筒　；参考：《安徽理工大学》2011年硕士论文

【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
[Abstract]:On the basis of introducing the general situation of ultra high pressure vessels and discussing the development of self reinforcing technology at home and abroad, the elastoplastic mechanical analysis method is used to elaborate the ideal elastoplastic material model, strain hardening material model, and the stress calculation formula of super high pressure self reinforcing container considering the Bausinger effect material model, and the thickness is introduced. A method for estimating the temperature stress of a wall cylinder.
Based on the optimal stress state of thick wall cylinder, the optimization design model is established by "optimization" design method. The optimization design program is developed by using MATLAB software, and a human-computer interface is developed for the optimization design of thick wall self reinforced cylinder. The program has the function of human-computer dialogue, and the initial structure parameters are input in the interface of the program. Select the operating parameters, run the optimization program by clicking the button, get the optimization results, calculate the specific stress, display the stress distribution map and check the strength. Compared with the previous method to determine the radius of the self reinforcing elastic plastic interface, the calculation and convergence speed is fast, the result is intuitive, accurate and reliable, and it has strong visualization function and calculation knot. Fruit is easy to preserve and compare.
The finite element method is used to analyze the stress analysis of the ultra high pressure self reinforced container. The ANSYS software is used as an analysis tool. Through the analysis of the stress analysis and the stress analysis of the reactor without self enhancement and self reinforcement, it is proved that the super high pressure self reinforced container has high elastic bearing capacity, low average stress and cyclic stress amplitude. The stress distribution along the wall thickness is more uniform and the utilization ratio of the material is high. In addition, the internal heating method can reduce the stress of the inner wall of the cylinder, and the stress distribution of the cylinder tends to be uniform. Compared with the previous manual analysis, the method has the advantages of high analysis efficiency, wide analysis range and more intuitionistic analysis results.
Compared with the traditional analytic method, the finite element method and the optimal design method are more accurate, closer to the real value, and the scope of the analysis is wider. The application of computer aided design technology to the thick wall autofrettage cylinder is programmed, the stress analysis and comparison, the results obtained by the finite element method are closer to the actual work. And the partial autofrettage theory is verified.
Figure 39 table 6, 60

【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH49

【引证文献】