Generation of narrowband Lamb waves based on the Michelson interference technique

doi:10.1088/1674-1056/27/5/054301

中国物理B ›› 2018, Vol. 27 ›› Issue (5): 54301-054301.doi: 10.1088/1674-1056/27/5/054301

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Generation of narrowband Lamb waves based on the Michelson interference technique

Tian-Ming Ye(叶天明), Yan-Feng Xu(徐琰锋), Wen-Xiang Hu(胡文祥)

Institute of Acoustics, Tongji University, Shanghai 200092, China

收稿日期:2018-01-07 修回日期:2018-03-08 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: Wen-Xiang Hu E-mail:wxhu@tongji.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.11374230 and 11774264).

Generation of narrowband Lamb waves based on the Michelson interference technique

Tian-Ming Ye(叶天明), Yan-Feng Xu(徐琰锋), Wen-Xiang Hu(胡文祥)

Institute of Acoustics, Tongji University, Shanghai 200092, China

Received:2018-01-07 Revised:2018-03-08 Online:2018-05-05 Published:2018-05-05
Contact: Wen-Xiang Hu E-mail:wxhu@tongji.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.11374230 and 11774264).

摘要/Abstract

摘要： An optical method of generating narrowband Lamb waves is presented. It is carried out with a laser line array in a thermoelastic regime implemented by the Michelson interference technique, where the formed array element spacing can be flexibly and conveniently changed to achieve selective mode excitation. In order to simulate the displacement response generated by this array, its intensity distribution function is presented to build a theoretical analysis model and to derive the integral representation of the displacement response. The experimental device and measuring system are built to generate and detect the Lamb waves on a steel plate. Numerical calculation results of narrowband Lamb wave displacement signals based on the theoretical model show good agreement with experimental results.

关键词: narrowband Lamb wave, selective generation, laser array, laser ultrasonics

Abstract: An optical method of generating narrowband Lamb waves is presented. It is carried out with a laser line array in a thermoelastic regime implemented by the Michelson interference technique, where the formed array element spacing can be flexibly and conveniently changed to achieve selective mode excitation. In order to simulate the displacement response generated by this array, its intensity distribution function is presented to build a theoretical analysis model and to derive the integral representation of the displacement response. The experimental device and measuring system are built to generate and detect the Lamb waves on a steel plate. Numerical calculation results of narrowband Lamb wave displacement signals based on the theoretical model show good agreement with experimental results.

Key words: narrowband Lamb wave, selective generation, laser array, laser ultrasonics

中图分类号: (General linear acoustics)

43.20.-f

43.35.-c (Ultrasonics, quantum acoustics, and physical effects of sound)

叶天明, 徐琰锋, 胡文祥. Generation of narrowband Lamb waves based on the Michelson interference technique[J]. 中国物理B, 2018, 27(5): 54301-054301.

Tian-Ming Ye(叶天明), Yan-Feng Xu(徐琰锋), Wen-Xiang Hu(胡文祥). Generation of narrowband Lamb waves based on the Michelson interference technique[J]. Chin. Phys. B, 2018, 27(5): 54301-054301.

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Generation of narrowband Lamb waves based on the Michelson interference technique

Generation of narrowband Lamb waves based on the Michelson interference technique

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