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http://hdl.handle.net/10397/95530
Title: | Frequency attenuation band with low vibration transmission in a finite-size plate strip embedded with 2D acoustic black holes | Authors: | Ji, H Han, B Cheng, L Inman, DJ Qiu, J |
Issue Date: | 15-Jan-2022 | Source: | Mechanical systems and signal processing, 15 Jan. 2022, v. 163, 108149 | Abstract: | Acoustic Black Hole (ABH) structures allowing for wave manipulation and energy focalization have potential applications in broadband structural vibration suppression. In this work, the vibration transmission characteristics of a plate strip embedded with multiple two-dimensional (2D) ABH without additional damping material were investigated. Both the simulation and experimental results show that the investigated structure exhibits attenuation bands with low vibration transmission, and the vibration attenuation phenomenon appears in frequency ranges well below the cut-on frequency of the ABHs. The width and position of the attenuation bands depend on the number of ABHs. A numerical investigation was carried out on the mechanism of the attenuation band generation. The analysis results show dual physical effects: low modal transmission in asymmetrical structures and modal displacement cancellation on the receiving side in both asymmetrical and symmetrical structures. Strong local structural resonances induced by ABHs play an important role in modal transmission reduction, modal displacement cancellation and weak excitation of some modes. The attenuation phenomenon reveals a new ABH-specific feature which enriches the existing knowledge on ABH structures and broadens the design perspective of vibration attenuation through band creation. | Keywords: | Acoustic black hole Local structural resonance Modal displacement cancellation Modal transmission Vibration attenuation band |
Publisher: | Academic Press | Journal: | Mechanical systems and signal processing | ISSN: | 0888-3270 | EISSN: | 1096-1216 | DOI: | 10.1016/j.ymssp.2021.108149 | Rights: | © 2021 Elsevier Ltd. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Ji, H., Han, B., Cheng, L., Inman, D. J., & Qiu, J. (2022). Frequency attenuation band with low vibration transmission in a finite-size plate strip embedded with 2D acoustic black holes. Mechanical Systems and Signal Processing, 163, 108149 is available at https://dx.doi.org/10.1016/j.ymssp.2021.108149. |
Appears in Collections: | Journal/Magazine Article |
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Cheng_Frequency_Attenuation_Band.pdf | Pre-Published version | 2.38 MB | Adobe PDF | View/Open |
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