摘要
通过对广义Snell(斯涅尔)反射定律的分析,提出了一种亚波长的声学微结构,该结构通过对反射界面相位的设计来控制反射波波矢方向,从而实现对声波反射方向的调控。利用COMSOL仿真软件对该结构仿真模拟,并分别利用易拉罐阵列及通过3D打印技术制作的声学器件对其反射声场进行试验测量。试验结果证明在声波正入射条件下可产生不同角度偏转的异常反射,数值模拟和试验测量结果与理论计算数据基本吻合,表明该结构可以有效地获得任意可调的反射角。该研究在音乐厅设计、超声医学等领域有应用潜力。
Based on the generalized Snell′s reflection law,an acoustic artificial structure was designed to utilize the spatial distribution of the reflection phase to steer the outgoing direction of the reflected acoustic wave.The reflected acoustic field of this acoustic structure is studied by simulation and measurement.The experimental results well match the theoretical predictions,proving that the designed acoustic structure can effectively produce different deviation angles under normal incident condition,leading the reflected wave to propagate along the abnormal reflection angle as anticipated.This study may have potential applications in various fields such as music hall design and ultrasound medical treatment.
作者
鲍蕊
林玮
BAO Rui;LIN Wei(Department of Applied Physics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)
出处
《无损检测》
2019年第2期21-25,共5页
Nondestructive Testing
