Jerome Thomas S, Hamilton Mark F
Applied Research Laboratories, The University of Texas at Austin, Austin, Texas 78713-8029, USA.
J Acoust Soc Am. 2021 Nov;150(5):3417. doi: 10.1121/10.0006739.
The Born approximation developed previously to model acoustic radiation force and torque exerted on homogeneous compressible objects of arbitrary shape [Jerome et al., J. Acoust. Soc. Am. 145, 36-44 (2019)] is extended to include objects that are inhomogeneous. The same general restrictions apply to this extended model, mainly that the incident field is not too similar to a progressive plane wave, that the material properties of the object do not differ substantially from those of the surrounding fluid, and that the size of the object is not much larger than a wavelength. Two applications of the model are presented, one for objects consisting of connected homogeneous regions with different material properties, and the other for objects with continuously varying material properties. Calculations are presented for spheres, finite cylinders, and prolate spheroids.
先前开发的用于模拟施加在任意形状的均匀可压缩物体上的声辐射力和扭矩的玻恩近似[杰罗姆等人，《美国声学学会杂志》145, 36 - 44 (2019)]被扩展到包括非均匀物体。相同的一般限制适用于这个扩展模型，主要是入射场与行波平面波不太相似、物体的材料特性与周围流体的材料特性没有实质性差异、物体的尺寸不比分波长大多。给出了该模型的两个应用，一个用于由具有不同材料特性的相连均匀区域组成的物体，另一个用于材料特性连续变化的物体。给出了球体、有限圆柱体和长球体的计算结果。
