标题： 流体中的动态超声辐射力 显示英文标题

标题： Dynamic ultrasound radiation force in fluids

摘要： 本文的主题是提出一种理论，用于描述双频超声波束在无损耗和非色散流体中产生的动态辐射力。 从流体动力学方程中推导出一个公式，用于计算双频波束对三维物体施加的动态辐射力。 分析了动态辐射力对介质非线性效应的依赖性。 该理论被用于计算低振幅双频平面波对固体弹性（黄铜和不锈钢）球体施加的动态辐射力。 通过求解固体弹性球体的双频平面波散射问题来计算动态辐射力。 结果表明，所分析球体上的动态辐射力表现出类似于静态辐射力中的波动。 此外，对不锈钢球体的静态和动态辐射力进行分析表明，它们的大小大致相同。 显示英文摘要

摘要： The subject of this paper is to present a theory for the dynamic radiation force produced by dual-frequency ultrasound beams in lossless and non-dispersive fluids. A formula for the dynamic radiation force exerted on a three-dimensional object by a dual-frequency beam is obtained stemming from the fluid dynamics equations. Dependence of the dynamic radiation force to nonlinear effects of the medium is analyzed. The developed theory is applied to calculate the dynamic radiation force exerted on solid elastic (brass and stainless steel) spheres by a low-amplitude dual-frequency plane wave. The dynamic radiation force is calculated by solving the dual-frequency plane wave scattering problem for solid elastic spheres. Results show that the dynamic radiation force on the analized spheres presents fluctuations similar to those present in the static radiation force. Furthermore, analysis of the static and the dynamic radiation forces on the stainless steel sphere shows that they have approximately the same magnitude.