Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment
This paper presents a multi-Helmholtz unit series–parallel acoustic metamaterial with a segmented noise control effect designed by taking advantage of the adjustable frequency band of an acoustic metamaterial, aiming to change the main noise spectrum characteristics under different driving condition...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0231460 |
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| author | Shaohua Bi Fei Yang Xinmin Shen Wenqiang Peng Xiaocui Yang Qin Yin Xiaonan Zhang Heng Zhang Dong Wang Jingguo Chen Zhiming Li |
| author_facet | Shaohua Bi Fei Yang Xinmin Shen Wenqiang Peng Xiaocui Yang Qin Yin Xiaonan Zhang Heng Zhang Dong Wang Jingguo Chen Zhiming Li |
| author_sort | Shaohua Bi |
| collection | DOAJ |
| description | This paper presents a multi-Helmholtz unit series–parallel acoustic metamaterial with a segmented noise control effect designed by taking advantage of the adjustable frequency band of an acoustic metamaterial, aiming to change the main noise spectrum characteristics under different driving conditions of military equipment such as tanks. Based on the transfer matrix method, a theoretical model that can predict the acoustic characteristics of a hybrid structure with multiple Helmholtz resonator (HR) units is established, and its feasibility is verified through finite element simulations and experiments. By combining particle swarm optimization with finite element simulation, the suboptimal average sound absorption coefficient (αavg) of ten populations was 0.52, 0.54, 0.54, and 0.44, respectively, after iterating for 50 generations. The results demonstrate that the αavg of the four groups of HRs in series with three layers reaches 0.79, 0.62, and 0.66, respectively, at the frequency bands of 205–285, 540–720, and 940–1130 Hz, and the overall thickness of the longest part is 88 mm. Low-frequency noise at approximately λ/18 can be controlled. The HR obtained by means of the first series and then parallel can achieve accurate sound absorption for specific frequency bands and can reduce its volume by removing redundant absorption bands. The findings of this study provide an effective noise-control scheme for changing the noise environment in military equipment. |
| format | Article |
| id | doaj-art-304241d515a84ce784a875e0ba9906ed |
| institution | Kabale University |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-304241d515a84ce784a875e0ba9906ed2025-02-03T16:40:41ZengAIP Publishing LLCAIP Advances2158-32262025-01-01151015016015016-1610.1063/5.0231460Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipmentShaohua Bi0Fei Yang1Xinmin Shen2Wenqiang Peng3Xiaocui Yang4Qin Yin5Xiaonan Zhang6Heng Zhang7Dong Wang8Jingguo Chen9Zhiming Li10Field Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, No. 108 Deya Street, Changsha, Hunan 410073, ChinaEngineering Training Center, Nanjing Vocational University of Industry Technology, No. 1 North Yangshan Road, Nanjing, Jiangsu 210023, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaField Engineering College, Army Engineering University of PLA, No. 88 Houbiaoying Street, Nanjing, Jiangsu 210007, ChinaThis paper presents a multi-Helmholtz unit series–parallel acoustic metamaterial with a segmented noise control effect designed by taking advantage of the adjustable frequency band of an acoustic metamaterial, aiming to change the main noise spectrum characteristics under different driving conditions of military equipment such as tanks. Based on the transfer matrix method, a theoretical model that can predict the acoustic characteristics of a hybrid structure with multiple Helmholtz resonator (HR) units is established, and its feasibility is verified through finite element simulations and experiments. By combining particle swarm optimization with finite element simulation, the suboptimal average sound absorption coefficient (αavg) of ten populations was 0.52, 0.54, 0.54, and 0.44, respectively, after iterating for 50 generations. The results demonstrate that the αavg of the four groups of HRs in series with three layers reaches 0.79, 0.62, and 0.66, respectively, at the frequency bands of 205–285, 540–720, and 940–1130 Hz, and the overall thickness of the longest part is 88 mm. Low-frequency noise at approximately λ/18 can be controlled. The HR obtained by means of the first series and then parallel can achieve accurate sound absorption for specific frequency bands and can reduce its volume by removing redundant absorption bands. The findings of this study provide an effective noise-control scheme for changing the noise environment in military equipment.http://dx.doi.org/10.1063/5.0231460 |
| spellingShingle | Shaohua Bi Fei Yang Xinmin Shen Wenqiang Peng Xiaocui Yang Qin Yin Xiaonan Zhang Heng Zhang Dong Wang Jingguo Chen Zhiming Li Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment AIP Advances |
| title | Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| title_full | Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| title_fullStr | Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| title_full_unstemmed | Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| title_short | Optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| title_sort | optimal design of acoustic metamaterials for noise suppression by the frequency division in military equipment |
| url | http://dx.doi.org/10.1063/5.0231460 |
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