平面行波场中多个粒子受到的声辐射力  

The acoustic radiation force of multiple particles in plane wave field

作　　者：惠铭心 刘晓宙[1] 刘杰惠[1] 何爱军[2] 张古田[3] 章强[4] 

机构地区：[1]近代声学教育部重点实验室南京大学声学所,南京210093 [2]南京大学电子科学与工程系,南京210023 [3]南京大学医学院附属鼓楼医院,南京210008 [4]南京大学学报,南京210093

出　　处：《应用声学》2018年第1期106-113,共8页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(11774167);声场声信息国家重点实验室开放课题研究基金(SKLOA201609)

摘　　要：从粒子在行波场中的声散射出发,研究当声场中存在稀疏分布的多个粒子时粒子受到的声辐射力,并且给出了适用于声场中任意位置的粒子声辐射力计算公式。由于声辐射力为非线性力,当声场中存在多个粒子时,直接计算粒子受到的声辐射力非常复杂。结果表明,当声场中存在多个稀疏分布的粒子时,这一多粒子系统可以视为多个单独的双粒子系统的叠加,只需要分别计算各个双粒子系统的声辐射力就可以通过叠加得到声场中任意粒子的声辐射力。这一结果有助于利用声辐射力对微小粒子进行精细操控。In this paper, we study the acoustic radiation force of the particles when there are sparsely distributed particles in sound field, give the formula for calculating the acoustic radiation force of the particles in any position in sound field and make the simulation. Since the acoustic radiation force is nonlinear, it's very complicated for us to calculate the acoustic radiation force directly. Our calculation results show that when the sound field contains multiple sparsely distributed particles, the multi-particle system can be decomposed into several independent two-particle systems. Only need to calculate the acoustic radiation force of each two-particle system respectively, we can get the radiation force of any particle by superposition. These results will help to fine control the microparticles with acoustic radiation force.

关 键 词：行波 声辐射力 长距离 多个粒子 

分 类 号：O424[理学—声学]