| 球形粒子在Bessel波束照射下的轴向辐射力计算和分析 |
| |
| 引用本文： | 王明升,李威.球形粒子在Bessel波束照射下的轴向辐射力计算和分析[J].声学学报,2020,45(1):87-93. |
| |
| 作者姓名： | 王明升 李威 |
| |
| 作者单位： | 华中科技大学船舶与海洋工程学院 武汉 430074;华中科技大学船舶与海洋工程学院 武汉 430074;高新船舶与深海开发装备协同创新中心 上海200240;船舶和海洋水动力湖北省重点实验室 武汉 430074 |
| |
| 基金项目： | 国家自然科学基金项目(51579112)资助 |
| |
| 摘 要： | 通过声散射理论,将水中粒子的Bessel波束声散射场的分波序列(PWS)表达公式加以推广,进而推导出声辐射力的表达公式,获得了液体球及弹性球在Bessel波束下声辐射力的变化规律。通过观察不同散射角形态函数,可发现声辐射力的产生与粒子背向散射抑制程度有关。对于液体球粒子,球壳厚度及材料介质对粒子声辐射力有着重要的影响,同时Bessel波束波锥角越大,产生负声辐射力的可能性越大。对于弹性球和弹性单层壳粒子,声辐射力的产生与其本身的共振特征存在很大的关系。同时,通过改变球壳内介质及壳层厚度的方法,可增加产生的负声辐射力的频率范围及幅值强度.
|
| 收稿时间： | 2017-05-06 |
Calculation and analysis on axial acoustic radiation force of a Bessel beam on sphere particles |
| |
| Affiliation: | 1 School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074;2 Collaboratirve Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE), Shanghai 200240;3 Hubei Key Laboratory of Naval Architecture & Ocean Engineering Hydrodynamics(HUST), Wuhan 430074 |
| |
| Abstract: | Calculation and analysis on axial acoustic radiation force are very important for the understanding of the movement and trapping of small objects The axial acoustic radiation force of fluid sphere and elastic sphere illuminated by Bessel wave calculated by Partial Waves Series (PWS) is studied.By means of the harmonic expansion of Bessel beam and the scattering form function of sphere particles,the expression of the axial acoustic radiation force can be derived.Through the inspection of scattering form function of different scattering angle,the scattering into backward hemisphere is significantly depressed in the Bessel beam case where the acoustic radiation force Yp is negative.The effects of the thickness ratio and materials of double layers fluid sphere are analyzed.Meanwhile,through series of combinations of materials and thickness for elastic sphere and elastic shell,a wider frequency range and higher magnitude of negative Y_p could be achieved,and the radiation force of elastic sphere may be affected by the resonance of sphere elastic modes. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《声学学报》浏览原始摘要信息 |
|
点击此处可从《声学学报》下载全文 |
|
