空耦超声激发板波的COMSOL模拟

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (7): 129–.

空耦超声激发板波的COMSOL模拟

张东波，赵金峰，潘永东*

出版日期:2015-12-27 发布日期:2015-12-27
作者简介:(同济大学航空航天与力学学院,上海, 邮政编码 200092;)
基金资助:

收稿日期：2015-06-30
* 通讯联系人，E-mail：ypan@tongji.edu.cn

COMSOL Simulation of plate wave generated by air-coupled ultrasonic transducers

Zhang Dongbo, Yang Feng, Zhao Jinfeng, Pan Yongdong*

Online:2015-12-27 Published:2015-12-27
About author:(School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

摘要/Abstract

摘要： 空耦超声检测为非接触式无损检测，无需耦合剂，检测操作避免人为因素，可应用于较复杂的检测环境。论文针对空耦超声激发板的声传播，利用传递矩阵法计算得到其反射系数和透射系数随入射角和频厚积变化的规律。基于反射系数和透射系数在不同入射角和频厚积下的分布，选择S0板波模式进行声波激发，利用在COMSOL计算区域边界添加无限单元消除声波在边界处反射，得到了板波的反射和透射声场，并观察到板波在结构中反射和透射的实际过程。

Abstract: The air-coupled ultrasonic testing is an important trend in the field of non-contact non-destructive evaluation. To solve the sound propagation in the air-coupled plate structure, this paper calculated?the spectrum of reflective and transmission coefficients against the incident angle and frequency-thickness product by using the recursive softness matrix method. Based on the spectrum of reflective and transmission coefficients, S₀ wave mode was chosen to be excited by using the COMSOL finite element method. During the calculation, infinite elements were added in calculating area border to eliminate acoustic wave reflection on the boundary, and the reflective and transmission acoustic waves were observed.

张东波，赵金峰，潘永东*. 空耦超声激发板波的COMSOL模拟[J]. 南京大学学报(自然科学版), 2015, 51(7): 129–.

Zhang Dongbo, Yang Feng, Zhao Jinfeng, Pan Yongdong*. COMSOL Simulation of plate wave generated by air-coupled ultrasonic transducers[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(7): 129–.

参考文献

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