查詢結果分析
來源資料
頁籤選單縮合
題名 | Investigation of a Constricted Annular Acoustic Resonator Part(Ⅱ)--Experiment=截面積突縮環狀聲波共振器之研究(Ⅱ)--實驗 |
---|---|
作者姓名(中文) | 林筱增; | 書刊名 | 中正嶺學報 |
卷期 | 28:2 2000.03[民89.03] |
頁次 | 頁39-52 |
分類號 | 447.11 |
關鍵詞 | 環狀共振器; 截面積突縮; 特徵模態; Annular resonator; Constriction; Eigenmode; |
語文 | 英文(English) |
中文摘要 | 本文旨在以實驗來探討截面積突縮環狀共振器之聲波模態,並將結果與理論值比 較。結果顯示將共振器部份截面積突縮將使共振器原有的縱向模態分離成兩個不同頻率之模 態,其中頻率較高之模態在截面積突縮處有一壓力反節點,而頻率較低之模態在此處有一速 度反節點。實驗所得共振器之聲波模態及共振頻率與理論值相當吻合,吾人並且發現截面積 突縮處之終端修正為一重要影響因素,必須一併納入考量,未來之研究重點為更精確之終端 修正理論。 |
英文摘要 | The acoustic modes in a constricted annular resonator are investigated experimentally and the findings compared with those of a theoretical investigation. The acoustic resonator under study is an air-filled annular aluminum duct. It is shown that introduces a constriction into an annular resonator splits each longitudinal duct mode into two modes, one of a higher frequency with a pressure antinode at the constriction and one at a lower frequency with a velocity antinode near the constriction. Overall agreement between measured and predicted mode shapes and resonance frequencies is very good. It is found that it is necessary to include end corrections at the constriction to get accurate agreement between measured and predicted results. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。