基于瑞利积分叠加法的聚焦换能器声场特性研究  

Sound Fields in a Concave Spherical Transducer with Linear Superposition of Rayleigh Integrals

作　　者：程建政[1] 周玉禄[2] 毛彦欣[3] 张德俊[2] 

机构地区：[1]武汉科技学院,湖北武汉430073 [2]中国科学院武汉物理与数学研究所,湖北武汉430071 [3]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《计算物理》2008年第4期493-498,共6页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(批准号:10574144,10774164)资助的项目

摘　　要：基于经典的瑞利积分,提出考虑非线性传播、各次谐波衰减的声场瑞利积分线性叠加算法.分析其原理,并以凹球面聚焦换能器为例,采用该算法研究媒质衰减和非线性传播特性影响声焦域的规律.并与Khokhov-Zabolotskaya-Kuznesov(KZK)数值算法,以及实验结果进行比较,验证瑞利积分线性叠加算法描述高强度聚焦超声(HIFU)声场的有效性.A method called Rayleigh integral linear superposition algorithm is introduced, in which nonlinear propagation and high order harmonic attenuation are considered. Principle of the method is analyzed. For a concave spherical transducer, medium attenuation and nonlinear propagation in sound focused region are studied. The method is compared with Khokhov-Zabolotskaya-Kuznesov（KZK） method. It is shown that the method is effective in calculating high-intensity focused ultrasound（HIFU） sound fields.

关 键 词：瑞利积分线性叠加算法 声焦域 高强度聚焦超声 

分 类 号：O426.6[理学—声学]