椭球粒子声辐射力计算及分析  

Calculation and analysis on acoustic radiation force by a fixed spheroid

作　　者：王明升 欧阳杰 刘浩 崔自宪 WANG Mingsheng;OUYANG Jie;LIU Hao;CUI Zixian(Hangzhou Applied Acoustics Research Institute,Hangzhou 310012,China;Systems Engineering Research Institute,Beijing 100094,China)

机构地区：[1]杭州应用声学研究所,杭州310012 [2]中国船舶工业系统工程研究院,北京100094

出　　处：《应用声学》2020年第4期550-557,共8页Journal of Applied Acoustics

摘　　要：针对水下椭球粒子,以声散射理论为基础,采用分波序列的方法,建立了椭球粒子声辐射力的理论计算模型.进而根据声辐射力计算公式,以刚性椭球粒子和液体椭球粒子为例,计算并分析不同Bessel波束作用下椭球粒子的轴向声辐射力函数特征.数值仿真计算结果表明,对于刚性椭球粒子,扁平椭球粒子相对于细长椭球粒子更有助于激发负声辐射力;对于液体椭球粒子,细长椭球粒子相对于扁平椭球粒子更加容易产生负声辐射力;对于不同介质的椭球粒子,不同的入射波束激发的负声辐射力的效果也存在明显的差异.该结果为复杂的尺寸和介质粒子声操控技术提供了理论的可行性.Based on acoustic scattering theory,a computational model of acoustic radiation force on oblate and prolate spheroids is established in terms of partial wave series(PWS)method.Through the formula of acoustic radiation force,the axial acoustic radiation force of rigid and liquid spheroids illuminated by Bessel beams is calculated and analyzed.Numerical simulations showing,for rigid spheroids,negative acoustic radiation force could be benefited by oblate spheroids more easily compared with prolate spheroids.However,liquid prolate spheroids could stimulate the emergency of negative acoustic radiation more easily than liquid oblate spheroids.Besides,the negative acoustic radiation force is also influenced by the zeroth and first Bessel beams obviously.These results could illustrate that the application of acoustic tweezers for rigid and liquid spheroid particles is feasible theoretically.

关 键 词：椭球粒子 声辐射力 Bessel波束 分波序列方法 

分 类 号：O424[理学—声学]