《大型汽轮机转子锻件凹面板漏盘镦粗工序研究》-毕业论文.doc

PAGE 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc229410794 摘 要 PAGEREF _Toc229410794 \h I HYPERLINK \l _Toc229410795 ABSTRACT PAGEREF _Toc229410795 \h II HYPERLINK \l _Toc229410796 1 绪论 PAGEREF _Toc229410796 \h 1 HYPERLINK \l _Toc229410797 1.1概述 PAGEREF _Toc229410797 \h 1 HYPERLINK \l _Toc229410798 1.2大型汽轮机转子的制造概况 PAGEREF _Toc229410798 \h 2 HYPERLINK \l _Toc229410799 1.2.1国内外大型汽轮机转子生产研究状况 PAGEREF _Toc229410799 \h 2 HYPERLINK \l _Toc229410800 1.2.2转子生产过程重要工序 PAGEREF _Toc229410800 \h 3 HYPERLINK \l _Toc229410801 1.2.3 300MW汽轮机低压转子锻件锻造工艺过程 PAGEREF _Toc229410801 \h 4 HYPERLINK \l _Toc229410802 1.3大型锻件镦粗工艺概况 PAGEREF _Toc229410802 \h 4 HYPERLINK \l _Toc229410803 1.3.1镦粗基本概念 PAGEREF _Toc229410803 \h 5 HYPERLINK \l _Toc229410804 1.3.2几种镦粗理论概述 PAGEREF _Toc229410804 \h 5 HYPERLINK \l _Toc229410805 1.4本文主要内容 PAGEREF _Toc229410805 \h 8 HYPERLINK \l _Toc229410806 2 镦粗力学分析及镦粗新工艺 PAGEREF _Toc229410806 \h 9 HYPERLINK \l _Toc229410807 2.1非均匀镦粗金属流动原理 PAGEREF _Toc229410807 \h 9 HYPERLINK \l _Toc229410808 2.2普通平板间镦粗圆柱体的新理论 PAGEREF _Toc229410808 \h 10 HYPERLINK \l _Toc229410809 2.2.1 基本假设 PAGEREF _Toc229410809 \h 10 HYPERLINK \l _Toc229410810 2.2.2 刚塑性力学模型的拉应力理论 PAGEREF _Toc229410810 \h 11 HYPERLINK \l _Toc229410811 2.2.3 静水应力区力学模型的切应力理论 PAGEREF _Toc229410811 \h 13 HYPERLINK \l _Toc229410812 2.2.4 结论 PAGEREF _Toc229410812 \h 13 HYPERLINK \l _Toc229410813 2.3凹面板漏盘圆柱体镦粗的力学模型 PAGEREF _Toc229410813 \h 14 HYPERLINK \l _Toc229410814 2.3.1提出新力学模型的依据 PAGEREF _Toc229410814 \h 14 HYPERLINK \l _Toc229410815 2.3.2力学模型与分析 PAGEREF _Toc229410815 \h 14 HYPERLINK \l _Toc229410816 2.3.3几何参数的数学关系 PAGEREF _Toc229410816 \h 16 HYPERLINK \l _Toc229410817 3 基于有限元软件DEFORM的数值模拟基本理论 PAGEREF _Toc229410817 \h 17 HYPERLINK \l _Toc229410818 3.1刚粘塑性有限元基本理论 PAGEREF _Toc229410818 \h 17 HYPERLINK \l _Toc229410819 3.1.1刚粘塑性材料的基本假设 PAGEREF _Toc229410819 \h 17 HYPERLINK \l _Toc229410820 3.1.2塑性力学基本方程 PAGEREF _Toc229410820 \h 17 HYPERLINK \l _Toc229410821 3.1.3刚粘塑性有限