柱面声透镜声场分析  

The Acoustic Field of a Cylindrical Acoustic Lens

作　　者：王勇[1] 李全禄[1] 吴晶[1] 张引红[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《压电与声光》2011年第5期695-698,701,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(10374064)

摘　　要：从惠更斯原理出发,采用点声源合成法对柱面型声透镜声场的分布及声场分布与透镜几何参数间的关系等作了分析。分析表明,如果对声透镜表面的划分足够小,则点声源合成法在一定程度上可用来对声透镜的声场作近似分析,同时发现柱面聚焦声透镜形成的线聚焦声场的分布和焦域声压幅值与声源频率、透镜长度、宽度及其几何半径均有复杂关系。The acoustic field distribution of the cylindrical acoustic lens and the relationship between the acoustic field distribution and the geometry parameter of the cylindrical lens have been analyzed by adopting the point-source superposition method based the Huygens principle. The results showed that this method could be used to analyze the acoustic field of the cylindrical acoustic lens proximately if the surface of the acoustic lens was divided small enough. At the same time, we found that the line-focusing acoustic radiation field distribution formed by the cylindrical focu- sing acoustic lens and the acoustic pressure amplitude of the focusing field complicatedly depended on the frequency, the length.the width and the raids of the lens.

关 键 词：辐射声场 线聚焦 点源合成 数值分析 

分 类 号：O422.2[理学—声学]