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系統識別號 U0026-0812200911151635
論文名稱(中文) 直昇機腳架之最佳化設計
論文名稱(英文) The Optimum Design of Helicopter Landing Bow
校院名稱 成功大學
系所名稱(中) 航空太空工程學系碩博士班
系所名稱(英) Department of Aeronautics & Astronautics
學年度 92
學期 2
出版年 93
研究生(中文) 陳俊佑
研究生(英文) Chun-Yu Chen
電子信箱 u7370883@tknet.tku.edu.tw
學號 p4691123
學位類別 碩士
語文別 中文
論文頁數 97頁
口試委員 口試委員-李文娟
口試委員-楊文彬
口試委員-鄭泗滄
指導教授-胡潛濱
中文關鍵字 最佳化設計  複合材料 
英文關鍵字 composite  optimum design 
學科別分類
中文摘要   本文主要針對針縫複合材料進行DCB測試,藉由臨界應變能釋放率 的量測來驗證針縫技術的抗脫層能力及探討不同線材與不同縫線間距對 值的影響,並利用有限元素分析腳架結構是否滿足設計規範。此外,為了達到腳架輕量化的目的,以改變腳架尺寸、疊層層數與纖維轉角的方式對腳架進行最佳化設計,所得的結果可用來提供新腳架設計的參考方針。最後,截取腳架最有可能損傷的區域,建構破壞分析模型以取得其應力場與位移場,並將其代入破壞參數定義式,獲得修正後之破壞參數,以判斷腳架之抗破壞能力。


英文摘要   From references, we know that through-thickness stitching can offer a significant improvement in the static delamination resistance of laminated composites. In this article, it is verified by the increasing value of critical strain energy release rate, Gc, determined from the DCB test. By the same test, the effects of different stitch distance and different stitch material on delamination resistance are also observed. After that, a structure analysis of landing bow is executed to see if the bow meets the design standard regulation.
  In optimum design, the weight of structure is defined as our objective function. Bow size, the number of layers, and lamina orientation are chosen as our design variables. The results of optimum design can be used as reference data for new bow design. Finally, stress fields and displacement fields can be calculated by fracture analysis in the maximum-stress region. Then we can obtain the fracture parameters by substituting stress and displacement fields into the modified definition of fracture parameters. The calculated fracture parameters can be utilized to judge the delamination resistance of the landing bow.


論文目次 致謝
摘要
英文摘要

目錄................................................i
表目錄..............................................iii
圖目錄..............................................iv
符號說明............................................viii

第一章 緒論.....................................1
1.1 前言......................................1
1.2 文獻回顧..................................2

第二章 針縫複合材料試驗-DCB實驗................4
2.1 DCB實驗介紹...............................4
2.2 DCB實驗試片製作...........................5
2.3 實驗類型..................................5
2.4 實驗程序..................................6
2.5 實驗結果..................................7

第三章 腳架靜力分析.............................9
3.1 直昇機腳架外型設計與結構設計..............9
3.2 直昇機腳架靜力分析........................11
3.2.1腳架分析資料.......................11
3.2.2腳架結構分析程序...................13
3.2.3腳架分析類型.......................14
3.2.4分析結果...........................16

第四章 腳架最佳化設計...........................17
4.1 ANSYS最佳設計功能.........................17
4.1.1最佳化設計的基本定義...............18
4.1.2 ANSYS最佳化方法...................20
4.2 最佳化分析流程............................23
4.3 最佳化分析類型............................23
4.4 最佳化分析結果............................25

第五章 破壞分析.................................27
5.1 破壞參數..................................27
5.2 破壞分析程序..............................29
5.3 直昇機腳架的破壞分析......................30
5.4 腳架破壞分析的後續工作....................31

第六章 結論與建議...............................32
6.1 結論......................................32
6.2 未來工作與建議............................32

參考文獻............................................33
附表................................................35
附圖................................................39
附錄一:DCB相關圖表..................................79
附錄二:蒙皮部份材料性質估測.........................90
自述
著作權聲明
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