一种脉冲贝塞尔波的构造及其非线性声场的仿真  

Construction and simulation of the non-linear ultrasonic field of a new kind of pulsed bessel beam

作　　者：赖雪晓[1] 韩志会[1] 彭虎[1,2] 

机构地区：[1]中国科学技术大学电子科学与技术系,安徽合肥230027 [2]合肥工业大学医学工程学院,安徽合肥230009

出　　处：《中国科学技术大学学报》2013年第4期313-318,共6页JUSTC

基　　金：国家自然科学基金(60871087)资助

摘　　要：为了获得物理可实现的脉冲非衍射波,构造了一种脉冲贝塞尔超声波,并对其非线性声场传播特性进行了仿真研究.通过分析声压幅度、声场分布等参数得知,所构造的脉冲贝塞尔波在非线性介质中具有良好的非衍射特性,并且在一定的传播深度内保持良好的非衍射特性,这对研究超声医学检测具有重要的意义.In order to attain the realizable non-diffracting pulsed wave,a new kind of pulsed Bessel ultrasonic beam was proposed.The propagation of the pulsed non-diffracting Bessel ultrasonic beam in the nonlinear medium was studied,and the pressure and distribution of the ultrasonic field was analysed.It can be concluded that the proposed construction method has the good property of non-diffraction in the non-linear medium and can hold the non-diffracting property until a certain depth of far field.Therefore,the new pulsed Bessel ultrasonic beam is important in ultrasonic medical detection.

关 键 词：脉冲Bessel波 非衍射性 非线性声场 KZK方程 

分 类 号：O426.9[理学—声学]