空气耦合超声斜入射均匀弹性层状介质材料的传播特性

doi:10.3969/j.issn.1000-1093.2016.11.018

兵工学报 ›› 2016, Vol. 37 ›› Issue (11): 2094-2100.doi: 10.3969/j.issn.1000-1093.2016.11.018

空气耦合超声斜入射均匀弹性层状介质材料的传播特性

王兴国，吴文林，陈正林，吴南星

（景德镇陶瓷大学机械电子工程学院, 江西景德镇 333403）

收稿日期:2016-02-02 修回日期:2016-02-02 上线日期:2016-12-30
通讯作者: 王兴国 E-mail:xgwang@yeah.net
作者简介:王兴国(1980—)，男，副教授
基金资助:
国家自然科学基金项目（51305184、51565020）；南昌航空大学无损检测技术教育部重点实验室开放基金项目(ZD201429008)

Propagation Characteristics of Oblique Incidence Air Coupling Ultrasonic Wave in Uniform Elastic Layered Medium

WANG Xing-guo, WU Wen-lin, CHEN Zheng-lin, WU Nan-xing

(School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Received:2016-02-02 Revised:2016-02-02 Online:2016-12-30
Contact: WANG Xing-guo E-mail:xgwang@yeah.net

摘要/Abstract

摘要： 针对空气耦合超声非接触、无损伤技术在均匀弹性层状介质材料中应用缺少相关理论依据的问题，从波动方程入手，利用传递矩阵法及声波气体与固体边界条件研究了空气耦合超声波以不同的入射角和检测频率在均匀弹性层状介质中的声传播规律，建立了基于空气耦合的均匀层状弹性材料检测方法。模拟结果表明：斜入射时，透射系数分布呈现多模式形态；当入射角超过横波临界入射角时，发生全反射现象；随着检测频率的逐渐增大，入射临界角逐渐变小；随着声入射角逐渐增大，截止声波频率与介质厚度积也逐渐增大。实验验证表明，实验结果与数值模拟结果基本吻合。

关键词: 材料检测与分析技术, 空气耦合, 波动方程, 透射系数, 均匀弹性, 层状介质

Abstract: The propagation rules of air coupling acoustic wave in uniform elastic layered medium are studied at the different incident angles and testing frequency according to the wave equation. The transfer matrix method and the gas-solid boundary conditions of acoustic wave are used to solve the problem which lacks theoretical support in the application of non-contact ultrasonic test technology in uniform elastic material. A testing method of uniform elastic medium is developed. The stimulated results show that the transmission coefficient distribution presents a form of multimode. The total reflection occurs when the incident angle exceed the critical angle of transverse wave. The incident critical angle decreases with the increase in testing frequency. The cutoff frequency-thickness product increases with the increase in incident angle. The experimental results are in agreement with the numerical results.

Key words: materials examination and analysis, air coupling, wave equation, transmission coefficient, uniform elasticity, layered meduim

中图分类号:

TB553

王兴国，吴文林，陈正林，吴南星. 空气耦合超声斜入射均匀弹性层状介质材料的传播特性[J]. 兵工学报, 2016, 37(11): 2094-2100.

WANG Xing-guo, WU Wen-lin, CHEN Zheng-lin, WU Nan-xing. Propagation Characteristics of Oblique Incidence Air Coupling Ultrasonic Wave in Uniform Elastic Layered Medium[J]. Acta Armamentarii, 2016, 37(11): 2094-2100.

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空气耦合超声斜入射均匀弹性层状介质材料的传播特性

Propagation Characteristics of Oblique Incidence Air Coupling Ultrasonic Wave in Uniform Elastic Layered Medium

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