查詢結果分析
相關文獻
- Diffraction of Acoustic Waves by Perfectly Soft Bodies
- Numerical Computation of Human Body Effects on Radiation Characteristics of A Circular Loop Antenna for Mobile Paging Communications
- 邊界積分方程法在聲波繞射計算上的應用
- Comparison of Numerical Solutions of Lower and Higher Order Integral Equation Methods for Multi-Element Aerofoils
頁籤選單縮合
題 名 | Diffraction of Acoustic Waves by Perfectly Soft Bodies=全軟物體之聲波繞射場 |
---|---|
作 者 | 黃清哲; 陳潮億; 楊世安; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 22:2 1998.03[民87.03] |
頁 次 | 頁199-213 |
分類號 | 444.9 |
關鍵詞 | 全軟物體; 聲波繞射場; 積分方程法; Acoustic waves; Diffraction; Integral equation; |
語 文 | 英文(English) |
中文摘要 | 本文主要是利用債分方程法探討全軟物體之聲波繞射場。計算實例中計算兩種 不同幾何形狀的物體,分別為圓球(鈍形物體)及圓片(薄片物體)。應用數值方法求解對任 意波數有效的積分方程所得圓球繞射場的結果興解折解一致,且不受積分方程中組合參數 的影響。對於圓片的問題,由於當其厚度很小時,積分方程中的核函數會出現峰值,造成 債分誤差,本文也提出丁解決這個問題的方法。圓片繞射場的數值計算結果與解析解完全 一致。本文也求出了上述兩種物體在使用不同積分方程時的特徵波數。在驗證數值模式的 準確性之後,不同參數像聲源位置、波數等對繞射場的影響也作了有系統的研究。 |
英文摘要 | The integral equation method is applied to compute the diffraction of acoustic waves by perfectly soft bodies. To demonstrate the procedure, two different kinds of body shapes are discussed, namely. a sphere (blunt body) and a circular disk (thin-shaped body). In the former case, an integral equation valid for all wave numbers is solved numerically. The numerical results are identical to analytical results and are independent of the values of the coupling constant. In the latter case, anew numerical technique is devised to perform integration involving peak values, which occur when the disk becomes very thin. In both examples, characteristic wavenumbers of different integral equations are given in detail over the studied range of wavenumbers. The characteristics of diffracted sound from a point source about these two bodies are discussed. Effects of different parameters on the diffracted sound field are studied systematically. |
本系統中英文摘要資訊取自各篇刊載內容。