论文:2013,Vol:31,Issue(6):853-857
引用本文:
曾向阳, 薛旭瑞, 王海涛. 基于声源叠加原理的大型号角扬声器声辐射特性分析[J]. 西北工业大学
Zeng Xiangyang, Xue Xurui, Wang Haitao. Numerical Analysis of Sound Emission Characteristics of Large Horn-L oaded Loudspeaker Based on Source Superposition Model[J]. Northwestern polytechnical university

基于声源叠加原理的大型号角扬声器声辐射特性分析
曾向阳1, 薛旭瑞2, 王海涛1
1. 西北工业大学 航海学院, 陕西 西安 710072;
2. 中航商用发动机有限责任公司, 上海 200241
摘要:
针对大型号角扬声器,文中采用一种新的数值方法即声源叠加法进行建模计算和分析,该方法将声场的解表示为一系列满足控制偏微分方程的基函数(偶极子或单极子)加权叠加的形式,具有算法简单、精度高的优点。对1个简化号角扬声器,分别利用声源叠加模型、解析法、边界元法计算并进行对比分析,验证了该方法的正确性和优势。最后利用它分析了2种常用的号角扬声器,即指数形号角扬声器和圆锥形号角扬声器的声辐射特性,得到了一些有价值的规律,对于扬声器设计具有很好的参考价值。
关键词:    号角扬声器    声辐射    声源叠加法    边界元法    声压级    指向性   
Numerical Analysis of Sound Emission Characteristics of Large Horn-L oaded Loudspeaker Based on Source Superposition Model
Zeng Xiangyang1, Xue Xurui2, Wang Haitao1
1. School of Marine Scinece and Technology, Northwestern Polytechnical University, Xi'an 710072, China;
2. AVIC Commercial Aircraft Engine Co. LTD, Shanghai 200241, China
Abstract:
The horn-loaded loudspeaker has advantages of strong direction performance, high output power,high efficiency and so on.Hence, there is significant value in analyzing the acoustic radiation characteristics of the horn -loaded loudspeaker for the design of high intensity noise weapons and sound amplifying equpments.The analytical method in this paper is the numerical method.At present, the BEM (boundrary element method ) is the main choice for the sound field analysis.However, it is only available for low and medium frequencies.Considering this, we use a new numerical method called source superposition technique to analyse the acoustic characterasitcs of the horn-louded loudspeaker.Its basic idea is to assume a solution as a series summation of basis functions satisfying the governing partial differential equation everywhere in domain.Firstly, to evaluate this technique effectively, a rigor-ous comparison with both known analytical solution and BEM method is done.And provened results show that it has simpler algorithm and higher speed.Then, we analysed the acoustic characterastics of two typical shapes of horn-loaded loudspeakers,exponential and conical horns;this comparison leads to some useful conclusions that are of val-uable significance to the design of the horn-loaded speaker.
Key words:    acoustic fields    acoustic radiators    algorithms    boundary element method    calculations    design    efficciency    functions    loudspeakers    mathematical models    MATLAB    mesh generation    numerical analysis    directionality    horn-loudspeaker    SPL    source superposition method   
收稿日期: 2013-04-01     修回日期:
DOI:
基金项目: 航空科学基金(20121553017)资助
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作者简介: 曾向阳(1974-),西北工业大学教授、博士生导师,主要从事声场模拟与控制及声源定位与识别研究。
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