气泡软化效应下的非线性声场  

Nonlinear sound field under the bubble softening effect Nonlinear sound field under bubble softening effect

作　　者：于佳文 杨德森 时洁[1,2,3] 张姜怡 付晓月[1,2,3] YU Jiawen;YANG Desen;SHI Jie;ZHANG Jiangyi;FU Xiaoyue(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学,水声技术重点实验室,黑龙江哈尔滨150001 [2]海洋信息获取与安全工业和信息化部重点实验室(哈尔滨工程大学),黑龙江哈尔滨150001 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2023年第9期1433-1444,共12页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52271342).

摘　　要：为研究气泡的存在对介质中非线性声场的影响,本文利用波动方程和Rayleigh-Plesset方程建立的有限差分和有限体积模型,分别求解了在单频波和双频波激励下含气泡水介质中任意时刻的声压分布。计算表明:在非线性条件下,沿声波传播方向长度为半波长的介质内存在共振频移,即介质发生了软化;含气泡水介质的非线性共振频移与振源的振幅有关,在一定范围内,频移随着振幅的增大而增大;并证明了介质中的软化是由气泡平均体积增大而引起的。本研究为提高参量阵声发射和接收效率等提供了一种思路。This work aims to study the influence of the presence of bubbles on nonlinear sound fields in media.The finite difference and finite volume models established by the wave and Rayleigh-Plesset equations are used to solve the sound pressure distribution in a medium containing bubble water at any time under the excitation of single-and dual-frequency waves,respectively.Calculation shows that under nonlinear conditions,a resonance frequency shift with a length of half a wavelength along the direction of sound wave propagation occurs in the medium;that is,the medium softens.The nonlinear resonance frequency shift in the medium containing bubble water is related to the amplitude of the vibration source.Within a certain range,the frequency shift increases with the increase in amplitude.The softening of the medium is proven to be caused by an increase in the average volume of bubbles.The work presented in this paper provides new ideas for improving the acoustic transmission and reception efficiency of parametric arrays.

关 键 词：非线性声学 含气泡水介质 波动方程 Rayleigh-Plesset方程 时域有限差分 多重散射 声学软化 共振频移 

分 类 号：O427.4[理学—声学]