超声造影剂微泡非线性声学特性的数值仿真
发布时间：2018-08-13 11:04
【摘要】：以空气泡为例,采用描述气泡半径运动的Rayleigh-Plesset方程,对其在高频声压辐照下的非线性振荡,散射声场和散射截面进行理论和数值研究,为获取更清晰的图像提供理论依据。结果表明:激励声压的频率在微泡的固有谐振频率附近时,可以产生强的二次谐波散射声压。同时,提高入射声强可以增大二次谐波散射截面,但不能改变基波散射截面。
[Abstract]:Taking air bubble as an example, the Rayleigh-Plesset equation describing the motion of bubble radius is used to study the nonlinear oscillation, scattered sound field and scattering cross section under high frequency sound pressure irradiation, which provides a theoretical basis for obtaining a clearer image. The results show that strong second harmonic scattering sound pressure can be produced when the frequency of excited sound pressure is near the inherent resonance frequency of microbubble. At the same time, the second harmonic scattering cross section can be increased by increasing the incident sound intensity, but the fundamental wave scattering cross section can not be changed.
【作者单位】： 中国科学院声学研究所东海研究站;
【基金】：国家自然科学基金项目(11274342;11304353;11474042;11574348)
【分类号】：R445.1;O426.9
本文编号：2180783
[Abstract]:Taking air bubble as an example, the Rayleigh-Plesset equation describing the motion of bubble radius is used to study the nonlinear oscillation, scattered sound field and scattering cross section under high frequency sound pressure irradiation, which provides a theoretical basis for obtaining a clearer image. The results show that strong second harmonic scattering sound pressure can be produced when the frequency of excited sound pressure is near the inherent resonance frequency of microbubble. At the same time, the second harmonic scattering cross section can be increased by increasing the incident sound intensity, but the fundamental wave scattering cross section can not be changed.
【作者单位】： 中国科学院声学研究所东海研究站;
【基金】：国家自然科学基金项目(11274342;11304353;11474042;11574348)
【分类号】：R445.1;O426.9
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