拍频声波中声陷球的动力学
Dynamics of an acoustically trapped sphere in beating sound waves
摘要：
聚焦的声驻波为小球产生胡克势阱，并能克服重力使其稳定悬浮。将捕获的球体暴露于第二横向行进的声波施加额外的声学力，该声学力驱动球体远离其机械平衡。驱动力通过驻陷波和行进驱动之间的干涉成形。此外，如果行波与驻波失谐，则驱动力以差频振荡。然而，波驱动谐振子的行为远不像教科书上的驱动谐振子，相反，它表现出非常丰富的动力学行为，这些行为是由驱动力的空间依赖性引起的。这些包括在谐波和次谐波的驱动频率，周期加倍路线的混乱和斐波那契级联振荡。因此，该模型系统示出了基于声场的频谱控制而不是空间控制的动态声学操纵的机会。
英文摘要：
A focused acoustic standing wave creates a Hookean potential well for a small sphere and can levitate it stably against gravity. Exposing the trapped sphere to a second transverse traveling sound wave imposes an additional acoustical force that drives the sphere away from its mechanical equilibrium. The driving force is shaped by interference between the standing trapping wave and the traveling driving. If, furthermore, the traveling wave is detuned from the standing wave, the driving force oscillates at the difference frequency. Far from behaving like a textbook driven harmonic oscillator, however, the wave-driven harmonic oscillator instead exhibits a remarkably rich variety of dynamical behaviors arising from the spatial dependence of the driving force. These include oscillations at both harmonics and subharmonics of the driving frequency, period-doubling routes to chaos and Fibonacci cascades. This model system therefore illustrates opportunities for dynamic acoustical manipulation based on spectral control of the sound field, rather than spatial control.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
