Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio
Aiming at solving the NVH problem in vehicles, a novel composite structure is proposed. The new structure uses a hollow-stub phononic-crystal with filled cylinders (HPFC) plate. Any unit in the plate consists of a lead head, a silicon rubber body, an aluminum base as outer column and an opposite arr...
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doaj-9a2fdca756a24d4995b4360cdb8166182021-07-23T13:36:46ZengMDPI AGCrystals2073-43522021-07-011182882810.3390/cryst11070828Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling RatioShaobo Zhang0Jiang Liu1Hongbo Zhang2Shuliang Wang3School of Mechanical & Automobile Engineering, Qingdao University of Technology, No. 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automobile Engineering, Qingdao University of Technology, No. 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automobile Engineering, Qingdao University of Technology, No. 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automobile Engineering, Qingdao University of Technology, No. 777 Jialingjiang Road, Qingdao 266520, ChinaAiming at solving the NVH problem in vehicles, a novel composite structure is proposed. The new structure uses a hollow-stub phononic-crystal with filled cylinders (HPFC) plate. Any unit in the plate consists of a lead head, a silicon rubber body, an aluminum base as outer column and an opposite arranged inner pole. The dispersion curves are investigated by numerical simulations and the influences of structural parameters are discussed, including traditional hollow radius, thickness, height ratio, and the new proposed filling ratio. Three new arrays are created and their spectrum maps are calculated. In the dispersion simulation results, new branches are observed. The new branches would move towards lower frequency zone and the band gap width enlarges as the filling ratio decreases. The transmission spectrum results show that the new design can realize three different multiplexing arrays for waveguides and also extend the locally resonant sonic band gap. In summary, the proposed HPFC structure could meet the requirement for noise guiding and filtering. Compared to a traditional phononic crystal plate, this new composite structure may be more suitable for noise reduction in rail or road vehicles.https://www.mdpi.com/2073-4352/11/7/828phononic crystalwhispering gallery modeone-side filled platevibration and noise reduction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shaobo Zhang Jiang Liu Hongbo Zhang Shuliang Wang |
spellingShingle |
Shaobo Zhang Jiang Liu Hongbo Zhang Shuliang Wang Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio Crystals phononic crystal whispering gallery mode one-side filled plate vibration and noise reduction |
author_facet |
Shaobo Zhang Jiang Liu Hongbo Zhang Shuliang Wang |
author_sort |
Shaobo Zhang |
title |
Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio |
title_short |
Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio |
title_full |
Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio |
title_fullStr |
Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio |
title_full_unstemmed |
Tunable Low Frequency Band Gap and Waveguide of Phononic Crystal Plates with Different Filling Ratio |
title_sort |
tunable low frequency band gap and waveguide of phononic crystal plates with different filling ratio |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2021-07-01 |
description |
Aiming at solving the NVH problem in vehicles, a novel composite structure is proposed. The new structure uses a hollow-stub phononic-crystal with filled cylinders (HPFC) plate. Any unit in the plate consists of a lead head, a silicon rubber body, an aluminum base as outer column and an opposite arranged inner pole. The dispersion curves are investigated by numerical simulations and the influences of structural parameters are discussed, including traditional hollow radius, thickness, height ratio, and the new proposed filling ratio. Three new arrays are created and their spectrum maps are calculated. In the dispersion simulation results, new branches are observed. The new branches would move towards lower frequency zone and the band gap width enlarges as the filling ratio decreases. The transmission spectrum results show that the new design can realize three different multiplexing arrays for waveguides and also extend the locally resonant sonic band gap. In summary, the proposed HPFC structure could meet the requirement for noise guiding and filtering. Compared to a traditional phononic crystal plate, this new composite structure may be more suitable for noise reduction in rail or road vehicles. |
topic |
phononic crystal whispering gallery mode one-side filled plate vibration and noise reduction |
url |
https://www.mdpi.com/2073-4352/11/7/828 |
work_keys_str_mv |
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