中北大学学报（自然科学版）2017，Vol.38Issue(5)：619-625,644,8.DOI:10.3969/j.issn.1673-3193.2017.05.020
基于双层柱状结构的声场局域与聚焦现象
Local and Focusing of Sound Field Based on Double Layer Cylindrical Structure
摘要
Abstract
The acoustic focusing effect and the singular local effect of the bilayer columnar structure im-mersed in water were studied,and the relationship between the acoustic focusing frequency and the cy-lindrical structure parameters was explored.The results show that when the ultrasonic source is incident on the surface of the double columnar structure,the acoustic focusing effect occurs in the center of the cylindrical structure.The high and low cycle distributions of single-stage,dipole and multi-stage local sound fields occur at different frequencies,and the sound pressure in the surrounding environment is al-most zero.This acoustic focusing effect results from the interference diffraction and the displacement eigenmode in the metal cylindrical structure.关键词
声聚焦/本征模式/周期分布/声场局域效应Key words
sound focus/intrinsic mode/periodic distribution/local effect of sound field分类
数理科学引用本文复制引用
韩建宁,唐帅,杨鹏..基于双层柱状结构的声场局域与聚焦现象[J].中北大学学报（自然科学版）,2017,38(5):619-625,644,8.基金项目
国家自然科学基金资助项目(61671414)) （61671414）
山西省青年基金资助项目(201601D202035) （201601D202035）
