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研究生:蔡柏良
研究生(外文):Tsai, Po-Liang
論文名稱:平行子結構有限元素之網格分割最佳化研究
論文名稱(外文):Optimized Mesh Partitioning for Parallel Substructure Finite Element Analysis
指導教授:謝尚賢謝尚賢引用關係
指導教授(外文):Hsieh, Shang-Hsien
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:土木工程學研究所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:98
中文關鍵詞:網格最佳化分割平行有限元素計算平行子結構法
外文關鍵詞:optimization of mesh partitioningparallel finite element method
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由於平行子結構有限元素分析可在大型結構物分析上於較短時間內獲得一個精確度較高的解,故在近年來漸受到重視。但平行子結構有限元素分析之效率,卻受限於大部份的網格分割演算法未考量矩陣靜態濃縮運算量的平衡和訊息傳遞量的最小化,致使平行效率無法有效的提昇。故本研究先對影響平行子結構有限元素分析運算量的因素,作一研究和探討。並利用此一結果,提出網格分割最佳化架構和方法。為證明此網格分割最佳化方法之可行性與效率,本研究利用數種不同類型網格進行實例測試。另為使最佳網格分割能有自動化的機制,本研究亦研擬網格分割最佳化之目標函數,使整個網格分割最佳化方法能達到完整和實用的地步。

In this thesis, an optimization approach for mesh partitioning is proposed to improve the efficiency of parallel substructure finite element computations. In this approach, an evaluation function and rules are designed based on empirical and experimental studies to obtain optimized mesh partitions automatically. Nine different examples are tested to demonstrate the effectiveness of the approach. The results indicate that the proposed approach can effectively improve the efficiency of parallel substructure finite element computations.

第一章 緒論1
1.1 研究動機與目的 1
1.2 研究內容及方法 3
1.3 論文架構 4
第二章 文獻回顧 5
2.1 平行處理5
2.2 有限元素分析之平行子結構法9
2.2.1 靜態濃縮法(Static Condensation)9
2.2.2 子結構法(Substructure Method )10
2.3 圖分割14
2.3.1 網格分割之核心演算法17
2.3.2 遞迴分割演算法21
2.3.3 網格分割之最佳化演算法24
2.3.4 多階層演算法25
第三章 網格分割之最佳化29
3.1 子結構運算量之探討29
3.2 網格分割最佳化方法與架構之建立與測試32
3.2.1 測試環境35
3.2.2 網格分割最佳化方法之行為測試結果37
3.2.3 網格分割最佳化方法之可行性測試44
3.2.4 網格分割最佳化方法可行性之測試結果45
第四章 最佳網格分割之自動化機制50
4.1 數據分析50
4.1.1 靜態濃縮運算時間之數據分析50
4.1.2 求解邊界自由度時間之數據分析54
4.1.3 網格分割成效評估公式56
4.2 實例測試60
第五章 結論與建議63

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