【作者】 崔静；

【导师】 高炳军；

【作者基本信息】 河北工业大学 ， 化工过程机械， 2004， 硕士

【摘要】 以一台在用加氢反应器为例，利用ANSYS5.6有限元软件，对裙座支撑区进行了机械应力分析和稳态温度场分析，在稳态温度场分析的基础上进行了热应力分析、机械应力加热应力分析，并进行了应力评定。利用ANSYS的参数化编程语言(APDL语言)及其优化模块建立了参数化模型，编制优化计算文件，利用基于分析设计的准等强度原则对裙座支撑区的h型锻件及封头内径进行了优化计算，材料消耗可降低约16％，实现了有限元数值计算技术与优化技术相结合的一体化设计。 借助三角形单元，以内压厚壁圆筒为例，分析了网格密度、边长比、厚度方向剖分数等对有限元计算精度的影响，并讨论了网格密度、计算精度以及CPU时间的关系。 利用ANSYS5.6有限元软件，分析讨论了裙座支撑位置对塔体封头裙座支撑区应力状况的影响，对裙座支撑位置进行了优化计算，并对HG20652-1998《塔器设计技术规定》中有关裙座支撑位置的规定进行了讨论。更多还原

【Abstract】 Taking a hydrogenation reactor in use as example, in virtue of ANSYS5.6, mechanical stress and steady-state temperature field of the skirt supporting region were analyzed. Furthermore, thermal stress and mechanical and thermal stress were analyzed with the data of steady-state temperature field. Stress assessment was also conducted. With the aid of APDL(ANSYS Parametric Design language) and OPT (optimization tool), parametric FEA modal was set up, and optimization file was worked out. Optimization was made for the h type forge piece and inside diameter of the head under the principle of quasi-equal strength based on the code of "design by analysis", which reduce about 16% material consumption.With the triangle cells and a pressurized thick wall cylinder, the influence of gridding density, length ratio of border, mesh layers on the account precision of the FEM was analyzed. The relationship of the gridding density, CPU time and account precision was also discussed.The optimization was processed on the skirt support location and the discussion was carried through on the specification of the support location made in HG20652-1998 "Specification of Columns Design" based on the analysis of the infection of the stress state to the supporting field using ANSYS5.6.更多还原