基于瑞利积分叠加法的聚焦换能器声场特性研究

计算物理 ›› 2008, Vol. 25 ›› Issue (4): 493-498.

基于瑞利积分叠加法的聚焦换能器声场特性研究

程建政^1,2, 周玉禄², 毛彦欣³, 张德俊²

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

收稿日期:2006-12-30 修回日期:2007-09-20 出版日期:2008-07-25 发布日期:2008-07-25
作者简介:程建政(1967-),男,湖北广水,教授,博士,从事超声检测、超声成像及信号处理研究.
基金资助:
国家自然科学基金(批准号:10574144,10774164)资助的项目

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

CHENG Jianzheng^1,2, ZHOU Yulu², MAO Yanxin³, ZHANG Dejun²

1. Wuhan University of Science and Engineering, Wuhan 430073, China;
2. Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
3. College of Electrical Engineering and Information, Jiangsu University, Zhenjiang 212013, China

Received:2006-12-30 Revised:2007-09-20 Online:2008-07-25 Published:2008-07-25

摘要/Abstract

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.

关键词: 瑞利积分线性叠加算法, 声焦域, 高强度聚焦超声

Abstract: 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.

Key words: Rayleigh integral method of linear superposition, sound focused region, high-intensity focused ultrasound

中图分类号:

O426.6

程建政, 周玉禄, 毛彦欣, 张德俊. 基于瑞利积分叠加法的聚焦换能器声场特性研究[J]. 计算物理, 2008, 25(4): 493-498.

CHENG Jianzheng, ZHOU Yulu, MAO Yanxin, ZHANG Dejun. Sound Fields in a Concave Spherical Transducer with Linear Superposition of Rayleigh Integrals[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2008, 25(4): 493-498.