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研究生:官愛蓮
研究生(外文):Ai-Lian Guan
論文名稱:MARC應用於翼片鍛造之模具最佳化設計
論文名稱(外文):Mold shape optimization design for forging of aerofoil sections using FE simulation software MARC
指導教授:葉維磬
學位類別:碩士
校院名稱:國立中央大學
系所名稱:機械工程研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:中文
論文頁數:100
中文關鍵詞:金屬成形鍛造有限元素分析最佳化
外文關鍵詞:forgingoptimizationaerofoilFEMMARC
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  本文目的在利用MARC有限元素軟體,分析NACA0022葉片冷鍛(Cold Forging)加工之最佳化問題,建立最佳模具曲線。
  首先利用魏[23] 所得之軸對稱閉模冷間鍛造成形實驗值及上界限解,與成形負荷與速度場比對之結果,驗證MARC分析冷鍛加工問題的可靠性與妥適性。
  再應用MARC有限元素分析軟體,結合最佳化軟體IMSL,建立MARC之最佳化系統,分析葉片鍛造加工問題。以不同摩擦條件,探討材料受力情形、建立最佳模具曲線,使得鍛件最後尺寸與目標葉片曲線誤差量最小。最後,針對誤差趨勢,發展出加權目標函數,改善材料因回彈所造成之局部誤差。
The purpose in this paper is that use the finite element software MARC to analyze the optimization of NACA0022 blade by cold forging processing and establish the best mold shape.
First, to confirm the reliability of the finite element software MARC, we use the experiment and upper-bound method solutions of load and velocity field by Wei’s [ 23 ] cold forging in axial-symmetry close-die, to compare with those solutions of MARC.
Also we union he finite element software MARC and optimal software IMSL to establish a optimal system of MARC which analyze the problem of blade in forging processing. By setting different factor of friction, we can discuss the stress of material and establish best curve of mold to get the minimum error between the final curve by forging and the goal curve of blade . Finally, in view of the erroneous tendency, we develops the cost function which has weight factor to improve the local error because of the spring back of material.
摘要 Ⅰ
致謝 Ⅱ
目錄 Ⅲ
圖表說明 Ⅵ
符號說明 Ⅷ
第一章 緒論
1-1 前言 1
1-2 文獻回顧 5
1-3 研究動機與目的 9
第二章 基本理論
2-1 最佳化設計基本定義 11
2-1-1 設計變數 11
2-1-2 目標函數 12
2-1-3 限制條件 12
2-2 MARC架構 14
2-2-1 有限元素求解程序 14
2-2-2 界面功能簡介 16
2-3 MARC前處理系統定義 17
2-3-1 材料性質定義模式 17
2-3-2 接觸定義 19
2-3-3 網格重新劃分與自適應技術 19
2-3-4 摩擦效應定義 20
2-4 MARC分析求解技術定義 21
2-4-1 參考座標系統 21
2-4-2 非線性代數方程組疊代求解方法 22
2-4-3 收斂性判斷依據 23
2-4-4 元素技術 25
第三章 MARC應用分析與最佳化數值方法
3-1 MARC應用分析      27
3-1-1 軸對稱閉模冷間鍛造成形實驗條件 27
3-1-2 有限元素環境設定 27
3-2 最佳化數值方法 31
3-2-1 基本假設 32
3-2-2 有限元素環境設定 32
3-2-3 最佳化設計方法 35
第四章 結果與討論
4-1 軸對稱閉模冷鍛成形實驗驗證結果 39
4-1-1 軸對稱閉模冷間鍛造成形負荷 39
4-1-2 胚料速度分析 40
4-2 葉片鍛造最佳化誤差分析 41
4-2-1 葉片鍛造誤差分析 42
4-2-2 葉片鍛造之成形鍛件速度場與成型力量分析 45
4-2-3 摩擦條件對葉片鍛造成形力量的影響 46
4-2-4 葉片鍛造之鍛件等效應力及等效應變分析 46
第五章 結論與建議
5-1 結論 48
5-2 建議 49
參考文獻 51
附錄 81
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Corporation. Volume D. Version 3.1.

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[26] http://www.aerospaceweb.org/question/airfoils/q0100.shtml
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