摘要
针对大尺寸楔形变幅杆辐射面振幅分布不均匀、放大系数较小的问题,采用近周期声子晶体异质位错结结构设计了振幅分布均匀、放大系数较大的新型变幅杆。利用有限元软件COMSOL对优化前、后的变幅杆进行了仿真分析,结果表明:近周期声子晶体异质位错结结构能有效抑制大尺寸楔形变幅杆的横向振动,大幅提高辐射面纵向振幅分布均匀度,增加放大系数。该方法为大尺寸楔形变幅杆的优化设计提供了新思路。
In order to solve the problems of uneven amplitude distribution on the radiation surface and small amplification factor of the large-dimension wedge horn,a new type of horn with uniform amplitude distribution and large amplification factor is designed by using the heterojunction dislocation structure of near periodic phononic crystal.Through comparative analysis in COMSOL,it is proved that the near periodic phononic crystal heterojunction dislocation structure can effectively suppress the lateral vibration of large-dimension wedge horn,greatly improve the longitudinal displacement distribution uniformity of radiation surface,and increase the amplification factor.The paper provides a new method for the optimal design of large-dimension wedge horn.
作者
林基艳
林书玉
LIN Jiyan;LIN Shuyu(School of Physics and Information Technology,Shaanxi Normal University,Xi′an 710119,Shaanxi,China;School of Information Technology,Yulin University,Yulin 719000,Shaanxi,China)
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第1期117-124,共8页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金(11674206,11874253,11964040)。
关键词
大尺寸楔形变幅杆
近周期声子晶体异质位错结
位移分布均匀度
放大系数
large-dimension wedge horn
heterojunction dislocation structure of near periodic phononic crystal
displacement distribution uniformity
amplification factor
作者简介
通信作者:林书玉,男,教授,博士生导师,主要从事功率超声和换能器方面的研究。E-mail:sylin@snnu.edu.cn。
