臺灣博碩士論文加值系統

本文使用商用有限元素軟體MSC.Dytran來建構震波管與金屬平板的有限元素模型，再將震波的初始條件、材料性質等參數輸入，進而模擬震波衝擊金屬平板的動態行為。並利用震波管、訊號處理器、示波器和高速攝影機等等儀器來進行實驗，量測金屬平板之位移以及應變。將模擬的數值與實驗的數據做比對與驗證，驗証主要分成三大部份：1.震波驗證2.震波衝擊較薄金屬平板之位移量驗證3.震波衝擊較厚金屬平板之應變值驗證，最後再將驗證後的結果作討論。
在一連串的驗證之下，Dytran模擬出來的震波與實際震波管產生出來的震波就有相當的準確性。在震波衝擊金屬平板方面，實驗與模擬的結果趨勢上也都大致相同。經過驗證之後，利用有限元素軟體作模擬，即可預測實驗的數值與趨勢，進而避免一些較危險性及不必要的實驗。量測到的實驗數據與結果，可作為相關研究上之實際參考外，希望亦可以有助於防彈衣、防彈裝甲在材料上的選擇與設計。未來可以將材料做改變，如比強度、比剛性較強的複合材料來取代金屬，也可以嘗試利用震波去衝擊玻纖布和碳纖布等等布料，來觀測其變化並紀錄。

This thesis used FEM simulation software-MSC.Dytran to building up the models of shock tube and metallic flat plate. Then we input the shock tube’s initial condition、material property to simulating the dynamic response of a metallic flat plate subject to the shock wave. Shock tube、signal conditioning amplifier、oscilloscope and high speed camera are used for our experiment to measure the displacement and strain of metallic flat plate. The experiment test results were compared with the Dytran simulated results. The verify apart from three parts：1.the shock wave 2.the displacement for thin metallic flat plate subject to shock wave 3.the strain for thick metallic flat plate subject to shock wave.
After the verify, the shock waves from Dytran and shock tube have quite accuracy. At the metallic flat plate subjecting to the shock wave part, the results of experiment and simulation are approximately the same in trend. Using FEM simulation software we can calculate the trend and the computation from experiment. We can avoid some dangerous and inessential experiment. The data and results can refer to correlative research. We also hope administer to the design for protecting cloth or armor. In the future, we can change our material. For example, the composite material which has large specific strength and specific stiffness. We can also use the glass and carbon fabrics subjecting to the shock wave.

目錄
簽名頁
授權書
誌謝
全文中文摘要
全文英文摘要
目錄
表目錄....................................................I
圖目錄....................................................Ш
第一章 緒論..............................................1
1-1 研究動機與目的.......................................1
1-2 文獻回顧.............................................2
1-3 研究方法.............................................4
1-4論文架構...............................................5
第二章 震波管理論背景.....................................7
2-1 前言.................................................7
2-2 GOVERNING EQUATIONS..................................8
2-3 RANKINE-HUGONIOT RELATIONS..........................11
2-4 座標轉換定理........................................13
2-5 震波管之基本原理....................................14
2-5-1震波簡介............................................14
2-5-2 震波的反射及繞射...................................15
2-5-3 震波管理論.........................................16
第三章 數值模擬分析方法.................................25
3-1 前言 ................................................25
3-2 MSC.Dytran介紹......................................26
3-3 震波管與金屬平板模型建立與邊界條件..................27
3-4 材料性質設定........................................28
3-5 震波數值設定........................................29
3-6 流固耦合設定........................................30
第四章 實驗設備、方法與步驟..............................37
4-1 實驗設備............................................37
4-1-1 震波管.............................................37
4-1-2 測試模具...........................................38
4-1-3 數據擷取系統.......................................38
4-2 實驗方法............................................39
4-3 實驗步驟............................................40
第五章 震波衝擊金屬平板之模擬結果與實驗驗證..............50
5-1 前言 ................................................50
5-2 震波驗證............................................51
5-2-1 震波之物理現象.....................................51
5-2-2 震波之強度驗證.....................................51
5-2-3 震波之速度驗證.....................................52
5-2-4 結論...............................................53
5-3 震波衝擊金屬平板之模擬結果與實驗驗證................54
5-3-1 前言...............................................54
5-3-2 震波衝擊金屬平板之位移驗證.........................55
5-3-3 震波衝擊金屬平板之應變驗證.........................57
5-3-4 Dytran模擬低壓段相同之1.3~1.6 Mach震波.............59
5-3-5 結論...............................................59
5-4 結果與討論..........................................60
第六章 結論與未來展望...................................122
6-1 結論................................................122
6-2 未來展望............................................123
附錄A...................................................124
參考文獻................................................129
自述....................................................132

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