Acoustic beam controlling in water by the design of phononic crystal

被引：16
|
作者：
Han, X. K. [1 ]
Zhang, Z. [1 ]
机构：
[1] Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China
来源：
EXTREME MECHANICS LETTERS | 2020年 / 34卷
基金：
中国国家自然科学基金;
关键词：
Phononic crystal; Line-defects; Self-collimation-based acoustic waves; Beam splitter; SELF-COLLIMATED BEAMS; WAVES; REFRACTION; SURFACE; BAND;
D O I：
10.1016/j.eml.2019.100602
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Three-component phononic crystals line-defects composed of aluminum, rubber and water were introduced to the aluminum pillars arrayed in water for controlling of the acoustic beam. The propagation properties of self-collimation-based acoustic waves were investigated by finite element method in the designed PC structure. Results reveal that the line-defects can lead to two splitting wave beams. The beam splitter PC structure can be controlled by adjusting the radii of the rods and the coating layer in the line defects. When the acoustic speed of the coating layer changes, the splitting propagation of the acoustic wave can be changed. The output acoustic wave can be altered by controlling the phase difference of the two incident sound sources. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：8
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