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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 宋家驥 | |
| dc.contributor.author | Shih-Husan Huang | en |
| dc.contributor.author | 黃士軒 | zh_TW |
| dc.date.accessioned | 2021-06-13T03:48:11Z | - |
| dc.date.available | 2014-08-02 | |
| dc.date.copyright | 2011-08-02 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-07-28 | |
| dc.identifier.citation | 參考文獻
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32418 | - |
| dc.description.abstract | 本研究利用有限元素數值分析和實驗來驗證聲子晶體的負折射現象和濾波波導現象。在負折射部分利用有限元素套裝軟體模擬體聲波通過聲子晶體發生負折射的頻率和角度，並設計一組直徑6mm、填充率0.51，三角晶格排列共20x6的陣列來做模擬與實驗的驗證。而在濾波波導部分則利用聲子晶體內部不同形式的缺陷來討論濾波和波導的效果，首先我們利用有限元素軟體COMSOL計算出聲子晶體的頻溝區段，並在聲子晶體內製造不同的缺陷且分析這些缺陷對於濾波和波傳的影響，並設計一組直徑 6mm、填充率0.46，正方晶格排列之聲子晶體來做模擬與實驗的驗證，利用聲子晶體在以上的這些特性，未來我們可以製作出具有聲源聚焦、濾波和波傳功能…等之聲學元件，讓聲子晶體的應用更為多元。 | zh_TW |
| dc.description.abstract | In this study, finite element analysis and experimental verification were employed for the negative refraction, filtering and waveguide phenomenon in phononic crystals. The software COMSOL with bulk acoustic wave propagates through the phononic crystal was used to find out the frequency and incident angle for the occurrence of negative refraction.. A physical array of 20 x 6 triangular lattice, fill factor 0.51 , and 6mm diameter for each singular pillar was designed for experimental validation. The effectiveness of filtering and waveguide was investigated by using various forms of defects in phononic crystal.. First of all, we use COMSOL to calculate the band gap of the phononic crystals and analyze different types of defect in phononic crystals for the impact of filtering and wave propagation. A physical array of square lattice, fill factor 0.46 , and 6mm diameter for each singular pillar was designed for experimental validation. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T03:48:11Z (GMT). No. of bitstreams: 1 ntu-100-R98525067-1.pdf: 4219507 bytes, checksum: 818bf0fabd81c97ed431f57b1f6c0871 (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 目錄
摘要 Ⅰ Abstrct Ⅱ 目錄 Ⅲ 表目錄 Ⅴ 圖目錄 Ⅵ 第一章 緒論 1 1-1 前言 1 1-2 文獻回顧 2 1-2-1 聲子晶體負折射現象 2 1-2-2 共振腔波導 3 1-3 本文結構簡介 4 第二章 理論基礎 7 2-1 平面波在流體中的波動方程 7 2-2 聲子晶體 9 2-3 有限元素法 10 第三章 聲子晶體負折射現象 17 3-1 前言 17 3-2 負折射折射角種類與判斷 17 3-3 負折射模擬參數 18 3-4 負折射模擬結果 20 3-4-1 入射角15度 20 3-4-2 入射角30度 21 3-4-3 入射角45度 22 3-5 實驗架構與方法 22 3-6 模擬與實驗結果比對 24 3-6-1 入射角15度 24 3-6-2 入射角30度 25 3-6-3 入射角45度 26 3-7 模擬與實驗誤差討論 27 第四章 聲子晶體共振腔波導 41 4-1 前言 41 4-2 共振腔波導模擬參數 41 4-3 聲子晶體局部缺線分析 43 4-3-1 前言 43 4-3-2 聲子晶體頻溝計算 43 4-3-3 聲子晶體線缺陷共振腔 44 4-3-4 聲子晶體點缺陷共振腔 45 4-4 共振腔波導模擬與分析 47 4-4-1 前言 47 4-4-2 L形波導 48 4-4-3 雙L形波導 49 4-5 實驗結果討論 50 第五章 結論 78 參考文獻 79 | |
| dc.language.iso | zh-TW | |
| dc.subject | 波導 | zh_TW |
| dc.subject | 共振腔 | zh_TW |
| dc.subject | 負折射 | zh_TW |
| dc.subject | 聲子晶體 | zh_TW |
| dc.subject | waveguide | en |
| dc.subject | negative refraction | en |
| dc.subject | phononic crystals | en |
| dc.subject | resonant cavity | en |
| dc.title | 利用聲子晶體探討共振腔波導與負折射現象 | zh_TW |
| dc.title | Resonant Cavity Waveguide and Negative Refraction by Phononic Crystal | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 99-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 黃維信,羅如燕,黃智勇 | |
| dc.subject.keyword | 聲子晶體,負折射,共振腔,波導, | zh_TW |
| dc.subject.keyword | phononic crystals,negative refraction,resonant cavity,waveguide, | en |
| dc.relation.page | 81 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2011-07-28 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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