Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1478
DC FieldValueLanguage
dc.contributor.advisor陳定宇zh_TW
dc.contributor.author劉連富zh_TW
dc.date2002zh_TW
dc.date.accessioned2014-06-05T11:40:57Z-
dc.date.available2014-06-05T11:40:57Z-
dc.identifier.urihttp://hdl.handle.net/11455/1478-
dc.description.abstract界面勁度之正確模擬攸關有限元素分析之結果,界面層勁度之模擬在以往都是以彈簧元素來進行模擬,此種方式雖然可以達到模擬界面之目的,但在建構有限元素模型上卻要花費很多的時間。本文是以三維正交異向性材料來模擬中間界面層元素,這個方法不僅可以完整的表現出界面層不同方向上的勁度特性,同時也可以減少建構有限元素模型的時間。 界面層的正交材料中之楊氏係數及剪力模數為驗證調整的對象,配合模態實驗量測到的自然振動頻率和局部模態,並結合最佳化方法來修正有限元素模型,最佳化的目標是減少數個實驗頻率和有限元素模型分析頻率的差,以實驗和分析振型的相似性為限制條件,使修正後的有限元素模型自然振動頻率最接近實驗量測的頻率並維持模態的正確性。本文亦對不同螺栓直徑與不同螺栓鎖緊扭力對界面層勁度之影響作討論。zh_TW
dc.description.abstractThe correct modeling of interfaces affects the results of finite element analysis. The stiffness of interface was usually modeled by spring elements. Although this approach achieves the purpose of modeling interfaces, the time spent on creating the finite elements model is significant. This thesis uses orthotropic interface element to simulate the stiffness of interface. The stiffnesses in the three orthotropic directions can be easily modeled. The time spent on modeling the interfaces is greatly reduced. The design variables used for modeling the interface are Young's moduli and shear moduli. The modal test is performed to get the test frequencies and partial mode shapes. The optimization method is used to find the optimum values of Young's and shear moduli. The objective of the optimization is to minimize the differences of measured and analyzed natural frequencies. The constraints are imposed to guarantee a certain value of modal assurance criterion between measured and analyzed mode shapes. The refined finite element model is expected to be more reliable. The effect of different torques and diameters of bolts on the stiffness of interface will be discussed.en_US
dc.description.tableofcontents中文摘要 i 英文摘要 ii 目錄 iii 圖目錄 vi 表目錄 xii 符號說明 xvi 第一章 緒論 1 1-1 前言 1 1-2 文獻回顧 2 1-3 研究目的與內容 5 第二章 模型修正理論和方法 7 2-1 界面勁度與阻尼之模擬 7 2-2 三維正交異向性性(Orthotropic)材料之應力應變關係 8 2-3 有限元素模型之修正與最佳化方法 11 2-4 設計靈敏度分析 14 2-5 有限元素模型之建立和分析 15 2-6 有限元素模型修正流程 16 第三章 模態實驗 18 3-1 實驗與解析模型模型 …18 3-1-1實驗模型設 ……………………………………………18 3-1-2螺栓鎖緊力之計算 ……………………………………19 3-1-3有限元素模型 …………………………………………21 3-2 實驗設備....................................22 3-3 實驗過程及步驟...............................24 3-4 實驗模態分析軟體之應用與實驗結果..............26 第四章 實例分析與討論...............................33 4-1 螺栓編號說明..................................40 4-2 實驗與解析驗證模態之選取 .......................41 範例1: M10六角螺栓和螺帽結合........................43 範例2: M10六角螺栓結合.............................51 範例3: M10六角承窩螺栓接合.........................59 範例4: M12六角螺栓和螺帽結合.......................67 範例5: M12六角螺栓結合.............................75 範例6: M12六角承窩螺栓接合.........................83 範例7: M16六角螺栓和螺帽結合.......................91 範例8: M16六角螺栓結合.............................99 範例9: M16六角承窩螺栓接合........................107 第五章 結論與展望..............................122 5-1 結論........................................122 5-2 未來展望與建議 ..............................123 參考文獻 124 附錄A 有限元素分析前後處理器與Nastran Dmap語法 ………127 附錄A-1有限元素分析前處理器……….………………….127 附錄A-2有限元素分析後處理器 ..….………………….128 附錄A-3 Msc/Nastran 的相關指令 ……….………………129 附錄A-4 MSC Nastran 輸入檔格式 ……….………………133 附錄 B OR25頻譜分析儀參數設定 ………………………………136 附錄 C Fortran執行Nastran之語法及系統環境變數設定……140 附錄 C-1 以Fortran執行Nastran 與系統環境變數之設定.140 附錄 C-2 Fortran 程式執行流程 …………………………140 附錄 D 設計靈敏度分析……………………………………………143zh_TW
dc.language.isoen_USzh_TW
dc.publisher機械工程學系zh_TW
dc.subject最佳化zh_TW
dc.subject模態zh_TW
dc.subject模態標準規範zh_TW
dc.subject勁度zh_TW
dc.subject正交異向性材料zh_TW
dc.subject自然振動頻率zh_TW
dc.subject特徵向量zh_TW
dc.subject特徵值zh_TW
dc.title螺栓結合界面之模擬與實驗驗證zh_TW
dc.titleModeling and Experimental Identification of Bolted Jointsen_US
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
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