| 杨华根,冯侃,李容.基于弹性波超表面的Lamb波透射调控*[J].,2023,42(1):34-41 |
| 基于弹性波超表面的Lamb波透射调控* |
| Lamb wave transmission control based on elastic wave metasurface |
| 投稿时间：2021-11-06 修订日期：2022-12-28 |
| 中文摘要: |
| 摘要：基于广义Snell定律，本文提出了一种曲梁型弹性波超表面结构。通过该结构对入射波进行相位调制，实现了板中Lamb波（A0模态）的异常透射调控，从而实现了波的负折射、非对称传输、声聚焦等功能。进一步的研究结果显示，若将该类超表面结构贴置在完整的铝板表面，通过引入吸声材料（阻尼），在保证薄板完整性的同时，可以起到显著消除薄板和超表面透射波场叠加的作用。该方法实现了对完整板结构Lamb波透射方向的有效调控，也为弹性波超表面提供了新的研究思路。 |
| 英文摘要: |
| Abstract: Based on the Generalized Snell''s Law, a curved beam elastic wave metasurface structure is proposed. Through phase modulation of incident wave, abnormal transmission regulation of Lamb wave (A0 mode) in the plate is realized, thus negative refraction, asymmetric transmission and acoustic focusing of wave are realized. Further research results show that the superposition of transmitted wave fields between the thin plate and the metasurface can be eliminated significantly if the metasurface structure is affixed to the surface of the intact aluminum plate by introducing sound absorbing materials (damping), while ensuring the integrity of the thin plate. This method can effectively control the transmission direction of Lamb wave of intact plate, and also provides a new research idea for elastic wave metasurface. |
| DOI：10.11684/j.issn.1000-310X.2023.01.005 |
| 中文关键词: 广义Snell定律 弹性波超表面 Lamb波调控 异常透射 |
| 英文关键词: Generalized Snell''s Law elastic wave metasurface Lamb wave regulation anomaly transmission |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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