Robust large-area elastic transverse wave transport in active acoustic metamaterials
We investigate robust large-area elastic transverse wave propagation in an actively tunable membrane-type acoustic metamaterial. The waveguide with multiple degrees of freedom to control the width of the interface mode is realized by designing a heterostructure including three domains. One central d...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161244 |
| _version_ | 1811683110929039360 |
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| author | Chen, Zhenyu Wang, Xiangyu Lim, C. W. Shi, Fan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Chen, Zhenyu Wang, Xiangyu Lim, C. W. Shi, Fan |
| author_sort | Chen, Zhenyu |
| collection | NTU |
| description | We investigate robust large-area elastic transverse wave propagation in an actively tunable membrane-type acoustic metamaterial. The waveguide with multiple degrees of freedom to control the width of the interface mode is realized by designing a heterostructure including three domains. One central domain is constructed by periodic unit cells in an ordinary state, where a Dirac cone can be observed in the band structure. The other two domains consist of periodic unit cells possessing opposite valley Chern numbers, respectively. By employing a finite element model, the topologically protected interface states with tunable degrees of freedom are exhibited. The energy of interface states distributes equally in the large-central region. Although a larger degree of freedom leads to lower amplitudes of interface states, larger total energy is demonstrated by defining a quality factor. Moreover, we design several waveguides with straight lines and sharp corners with different angles and denote three different notations to show clearly that the large-area transverse wave can propagate robustly through sharp corners. Finally, it is found that the large-area transverse wave transport shows immunity to disorders and defects in the propagation path. |
| first_indexed | 2024-10-01T04:07:32Z |
| format | Journal Article |
| id | ntu-10356/161244 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:07:32Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1612442022-08-22T06:16:08Z Robust large-area elastic transverse wave transport in active acoustic metamaterials Chen, Zhenyu Wang, Xiangyu Lim, C. W. Shi, Fan School of Civil and Environmental Engineering Engineering::Civil engineering Acoustic Metamaterial Interfaces State We investigate robust large-area elastic transverse wave propagation in an actively tunable membrane-type acoustic metamaterial. The waveguide with multiple degrees of freedom to control the width of the interface mode is realized by designing a heterostructure including three domains. One central domain is constructed by periodic unit cells in an ordinary state, where a Dirac cone can be observed in the band structure. The other two domains consist of periodic unit cells possessing opposite valley Chern numbers, respectively. By employing a finite element model, the topologically protected interface states with tunable degrees of freedom are exhibited. The energy of interface states distributes equally in the large-central region. Although a larger degree of freedom leads to lower amplitudes of interface states, larger total energy is demonstrated by defining a quality factor. Moreover, we design several waveguides with straight lines and sharp corners with different angles and denote three different notations to show clearly that the large-area transverse wave can propagate robustly through sharp corners. Finally, it is found that the large-area transverse wave transport shows immunity to disorders and defects in the propagation path. Published version 2022-08-22T06:16:08Z 2022-08-22T06:16:08Z 2022 Journal Article Chen, Z., Wang, X., Lim, C. W. & Shi, F. (2022). Robust large-area elastic transverse wave transport in active acoustic metamaterials. Journal of Applied Physics, 131(18), 185112-. https://dx.doi.org/10.1063/5.0087988 0021-8979 https://hdl.handle.net/10356/161244 10.1063/5.0087988 2-s2.0-85130093257 18 131 185112 en Journal of Applied Physics © 2022 Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Applied Physics and is made available with permission of Author(s). application/pdf |
| spellingShingle | Engineering::Civil engineering Acoustic Metamaterial Interfaces State Chen, Zhenyu Wang, Xiangyu Lim, C. W. Shi, Fan Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title | Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title_full | Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title_fullStr | Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title_full_unstemmed | Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title_short | Robust large-area elastic transverse wave transport in active acoustic metamaterials |
| title_sort | robust large area elastic transverse wave transport in active acoustic metamaterials |
| topic | Engineering::Civil engineering Acoustic Metamaterial Interfaces State |
| url | https://hdl.handle.net/10356/161244 |
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