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Kirchhoff近似低频修正方法研究

发表时间:2011-08-15  浏览量:1410  下载量:590
全部作者: 王斌,范军
作者单位: 上海交通大学船舶海洋与建筑工程学院
摘 要: 讨论Kirchhoff近似在低频辐射声场计算中的修正问题。通过分析典型结构表面阻抗频率特性,提出同时适用于低频、高频段的表面声压和表面振速之间的近似关系,从而对Kirchhoff近似进行修正,使其适用频段向低频延伸。数值仿真表明:修正后的Kirchhoff近似在整个频段均具有较高的计算精度。
关 键 词: 水声学;Kirchhoff近似;表面声阻抗;声辐射预报
Title: Research on modification of Kirchhoff approximation at low frequency
Author: WANG Bin, FAN Jun
Organization: School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University
Abstract: In this paper, modification of Kirchhoff approximation at low frequency has been discussed. By analyzing the frequency characteristics of typical structures� surface acoustic impedance, approximate relationship between surface pressure and surface velocity is proposed to be adapted for both low and high frequencies. Kirchhoff approximation is modified and extended over low�frequency. Numerical analysis proves that the modified Kirchhoff approximation has a reasonable precision in the whole frequency band.
Key words: underwater acoustics; Kirchhoff approximation; surface acoustic impedance; Predicfion of sound radiation
发表期数: 2011年8月第15期
引用格式: 王斌,范军. Kirchhoff近似低频修正方法研究[J]. 中国科技论文在线精品论文,2011,4(15):1359-1365.
 
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