文章摘要
徐佳新,马建敏.二维阵列换能器声辐射力分布的计算分析[J].声学技术,2018,37(4):398~404
二维阵列换能器声辐射力分布的计算分析
Calculation and analysis of acoustic radiation force distribution of a two-dimensional transducer array
投稿时间:2017-07-13  修订日期:2017-10-18
DOI:10.16300/j.cnki.1000-3630.2018.04.018
中文关键词: 阵列换能器  角谱理论  声辐射力分布  空间调控
英文关键词: transducer array  angular spectrum theory  acoustic radiation force distribution  spatial regulation
基金项目:
作者单位E-mail
徐佳新 复旦大学航空航天系, 上海 200433  
马建敏 复旦大学航空航天系, 上海 200433 jmma@fudan.edu.cn 
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中文摘要:
      利用角谱理论得到了圆形活塞换能器阵元组阵后作用在平面悬浮物体上的声辐射力分布公式。通过数值仿真,分析了换能器频率、阵元间距以及阵元数目对声辐射力分布的影响。计算结果表明,换能器组阵使得声辐射力分布的指向性变窄,强度增强;随着换能器频率的提高、阵元间距的增大以及阵元数目的增多,声辐射力分布的主瓣更尖锐,但阵元间距的增大会使声辐射力分布的旁瓣增高。为了改善声辐射力的空间分布,采用伪逆矩阵算法,以能量增益为目标函数,通过调节换能器阵元表面振动速度的幅值和相位来形成多焦点的声辐射力分布,为阵列换能器声辐射力分布的调控和声悬浮稳定性的研究提供帮助。
英文摘要:
      According to angular spectrum theory, the distribution of acoustic radiation force acting on the planar levitation object is derived. Through numerical simulation, the influence of transducer frequency, element spacing and the number of elements on the acoustic radiation force distribution is analyzed. The analysis result shows that the transducer array enhances the intensity and directivity of acoustic radiation force; with the increases of fre-quency, element spacing and the number of array elements, the main lobe of acoustic radiation force distribution becomes sharper. However, increasing element spacing will raise sidelobes of acoustic radiation force distribution. In order to improve space distribution of acoustic radiation force and to form multi-focus acoustic radiation force distribution, the amplitude and phase of the each element are adjusted by using the pseudo inverse matrix algorithm and choosing sound intensity gain as the objective function. It provides help for regulating the distribution of acoustic radiation force and for the study of acoustic levitation stability.
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