| 研究生: |
劉嘉欽 Liu, Chia-Chin |
|---|---|
| 論文名稱: |
材料內溫度與濕度交互作用之解析 Analysis of Coupled Heat and Moisture Diffusion in materials |
| 指導教授: |
譚建國
Tarn, Jiann-Quo |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2006 |
| 畢業學年度: | 94 |
| 語文別: | 中文 |
| 論文頁數: | 110 |
| 中文關鍵詞: | 交互作用 、濕度 、溫度 、材料 |
| 外文關鍵詞: | Coupled, Moisture, Heat, material |
| 相關次數: | 點閱:102 下載:2 |
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摘要
本文由熱量及濕氣平衡觀點構築出溫度與濕氣擴散之狀態空間交互作用之數學模式。文中以解析在異向性材料受環境變化影響所致之溫度與濕度之擴散分佈,針對濕氣擴散係數為常數之情況,分別使用特徵展開法以及漸進展開法來加以分析,探究兩者之優劣,並考慮不同邊界條件與起始條件下,材料內部溫度平衡與濕氣分布所受到之影響。研究得知,特徵展開適用範圍廣,但所需運算時間長,且隨著材料係數不同,求取反矩陣有產生ill condition之可能;漸進展開法形式簡便,但只適用於某些材料係數範圍,同時其冪次階層需要各自單獨推導,在推求近似解部分需要較多時間。兩者之共通點為,極短時間內高階項次之影響不可忽略,俱需取較多項次。文中以層板為例,根據特徵展開與漸進展開法,分別針對功能性材料與複合層版之溫度與濕度平衡以及擴散指數之分析。
A model of coupling of moisture diffusion and heat conduction in solids is proposed. The distribution of temperature and moisture in materials with constant diffusivity is investigated. The analysis use eigenfunction expansion method and perturbation method to find out the advantages of each other and search for temperature balance and moisture diffusion in materials with different boundary conditions and initial conditions. In the short time, it is necessary to consider more terms in calculation. Examples are considering functional graded material and multilayer
參考文獻
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