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研究生: 羅鼎翔
Lo, Ting-Hsiang
論文名稱: 智慧型複合材料結構之邊界元素振動分析
Vibration Analysis of Smart Composites via Boundary Element Method
指導教授: 胡潛濱
Hwu, Chyan-Bin
學位類別: 碩士
Master
系所名稱: 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年: 2019
畢業學年度: 107
語文別: 中文
論文頁數: 69
中文關鍵詞: 史磋公式異向性彈性力學壓電材料磁電彈材料振動分析
外文關鍵詞: Stroh formalism, Anisotropic elasticity, piezoelectric material, magneto-electro-elastic material, dynamic analysis
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  • 在異向性彈性力學的探討上,史磋公式(Stroh Formalism)可以藉由擴充相關材料性質矩陣的維度大小,進而延伸應用至壓電材料,以及磁電彈材料。本文中,利用此特性,則文獻中提及的無限板、孔洞、裂縫和異質問題之解析解,以及邊界元素法基本解皆不須重新推導,在智慧型材料分析中,我們經常以彈性複材板做為基材,以壓電或磁電彈材料作為感測器,因此本文也運用了矩陣的調適法,使得我們可以同時處理包含異向性彈性材料、壓電材料以及磁電彈材料的題目。而在邊界元素振動的探討中,我們一樣可以藉由史磋公式的特性,調整部分矩陣維度以及內容,不須經過重新推導即可直接延用至壓電材料以及磁電彈材料,最後將研究成果融入師門使用MATLAB程式語言撰寫出一套命名為AEPH(Anisotropic Elastic Plate_Hwu)的結構分析軟體中。
    為了驗證擴充的正確性,本文分析以下三種狀況,自由振動、穩態振動以及暫態振動的問題。在這些問題中,我們同時也加入了無限板、孔洞、裂縫以及異質振動的相關問題,探討其位移、應力、電場以及磁場與時間的關係,並經由商用有限元素分析軟體 ANSYS 來進行比對,以證明此擴充方式的可行性。

    Based upon the special feature of Stroh formalism, the analysis of two-dimensional anisotropic elasticity can be extended to the piezoelectric and magneto-electro-elastic materials (MEE) by expanding the related matrix dimension. By using the adaptable adjustment technique, the structure with simultaneous existence of anisotropic elastic, piezoelectric and magneto-electro-elastic materials can know be solved. With this technique, the analytical solutions, boundary element methods and even the dynamic problem in boundary element methods can now be employed in the problem with multiple kinds of materials. To show the correctness of the expansion in dynamic analysis of boundary element methods in piezoelectric and magneto-electro-elastic materials, three different kinds of analysis is considered. Free vibration, Steady-state vibration and Transient vibration are shown in this paper. Furthermore, the problem of a plate with cracks, inclusions, or holes are also mentioned. To testify the piezoelectric and magneto-electro-elastic dynamic analysis, the result calculated by the structure analysis software of our group AEPH will be compare with the commercial finite element software ANSYS.

    摘要 I Abstract II 致謝 VII 目錄 VIII 表目錄 X 圖目錄 XI 符號說明 XIII 第一章 緒論 1 1.1研究動機 1 1.2文獻回顧 2 1.3本文架構 3 第二章 史磋公式 4 2.1異向性材料 4 2.2壓電材料 4 2.3磁電彈材料 5 2.4通解 6 2.5 多材料問題調適法 8 第三章 邊界元素法 12 3.1邊界積分式 12 3.2二維基本解 16 3.2.1無限域平板 17 3.2.2雙材料平板 18 3.2.3含孔洞或裂縫平板 19 3.2.4含彈性異質平板 19 第四章 動態分析 20 4.1二維動態分析 20 4.2自然振動 25 4.3穩態振動 26 4.4暫態振動 26 第五章 AEPH程式設計 27 5.1控制變數介紹 27 5.2程式架構及計算流程 28 第六章 數值範例 32 6.1自然振動問題 33 6.2穩態振動問題 45 6.3暫態問題分析 52 第七章 結論 58 參考資料 59 附錄A 62

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