球体参数及柱腔对腔内胶囊球声辐射力的影响  

The effects of spherical parameters and cavity on the acoustic radiation force acting on a coated sphere in a cavity

作　　者：史菁尧 张小凤[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2018年第2期45-51,共7页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(11574191;11674208)

摘　　要：利用声散射理论,推导了平面波作用下,无限长充液刚性柱形腔中球形胶囊声辐射力的解析表达式,分析了胶囊球的材料及柱腔的相对尺寸对胶囊粒子声辐射力的影响。仿真结果表明:由于柱形腔的影响,声辐射力的大小和方向都发生明显变化,随着相对半径的增大,声辐射力的正负起伏较显著。涂层材料对声辐射力的大小和共振模态都有影响,由于涂层材料的不同,声辐射力的曲线会出现不同的共振峰。而胶囊球的内核材料对声辐射力大小的影响较小,却对声辐射力的共振特性影响较大。随着涂层厚度变薄,声辐射力的峰值向右偏移,并出现明显的共振模态。Based on acoustic scattering theory, the analytical expression of acoustic radiation force acting on a visco-elastic coated sphere located in an infinite rigid cylindrical cavity filled with ideal fluid is deduced for a plane progressive wave. The effects of the cylindrical cavity, the material of the sphere and the coated thicknesses on acoustic radiation force are discussed. The simulation results show that the cavity has influence on the values and directions of acoustic radiation force. The fluctuation of the acoustic radiation force curves is obvious with the increase of the spherical relative radius. The resonant modes and the magnitude of the acoustic radiation force are affected by the coated material. The forces appear different resonance peaks because of the difference of the coating materials. The resonant modes of the acoustic radiation forces on the sphere are changed with the variation of the core material. In addition, the resonant positions shift to higher frequencies when the coated thickness of the sphere becomes thinner. More resonant modes appear under this condition.

关 键 词：平面波 声辐射力 胶囊球 充液柱形腔 

分 类 号：O426.2[理学—声学]