CAJ | 학술논문

声学粒子操控技术在生物医学、材料科学等领域具有重要的应用，而声辐射力的控制是实现声学粒子操控的关键。利用时域有限差分法结合粒子表面的应力张量方程，对刚性球形粒子在调制高斯脉冲作用下的声辐射力特性进行了研究，详细分析了声场中存在其他粒子时，粒子间耦合振动对刚性球所受声辐射力的影响。仿真结果表明：由于受到周围粒子对声场的影响，刚性球形粒子的轴向和横向声辐射力都有所增加，但辐射力随频率的变化规律基本不发生改变。不同尺寸的周围粒子对刚性球形粒子声辐射力的影响不同，尺寸越大的粒子对声辐射力的影响越大。随着粒子间距离不断增大，刚性球形粒子受到的声辐射力随着距离的变化出现起伏。该研究为真实环境下粒子的声操控研究提供了理论依据。
성학입자조공기술재생물의학、재료과학등영역구유중요적응용，이성복사력적공제시실현성학입자조공적관건。이용시역유한차분법결합입자표면적응력장량방정，대강성구형입자재조제고사맥충작용하적성복사력특성진행료연구，상세분석료성장중존재기타입자시，입자간우합진동대강성구소수성복사력적영향。방진결과표명：유우수도주위입자대성장적영향，강성구형입자적축향화횡향성복사력도유소증가，단복사력수빈솔적변화규률기본불발생개변。불동척촌적주위입자대강성구형입자성복사력적영향불동，척촌월대적입자대성복사력적영향월대。수착입자간거리불단증대，강성구형입자수도적성복사력수착거리적변화출현기복。해연구위진실배경하입자적성조공연구제공료이론의거。
Acoustic particle manipulation has wide applications in biomedical and material science fields.The control of acoustic radiation is the key technique for acoustic manipulation.In this paper,the property of the acoustic radiation force for a rigid spherical particle incidented by modulated Gaussian acoustic beam was studied through finite difference time domain method and the stress tensor equations.The effects of coupling vibration between two particles on acoustic radiation force of rigid spherical particle were analyzed in detail.Simulation results show that the axial and transverse acoustic radiation force were all increased,due to the influence of the coupling vibration on a-coustic field when two particles were present.But the relationship between the acoustic radiation force and frequency did not change apparently.The size of the particle,around the rigid spherical particle has influence on acoustic radiation force.The larger the surrounding particle,the greater the effect on acoustic radiation force.The acoustic radiation force will become ups and downs when the distance between two particles increases.The study will provide theory foundation for acoustic manipulation in actual environment.