Ring-shaped acoustic black holes for broadband vibration isolation in plates.
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| Title: | Ring-shaped acoustic black holes for broadband vibration isolation in plates. |
|---|---|
| Authors: | Deng, Jie1,2 (AUTHOR), Guasch, Oriol1,2 (AUTHOR) oriol.guasch@salle.url.edu, Zheng, Ling1 (AUTHOR) |
| Source: | Journal of Sound & Vibration. Oct2019, Vol. 458, p109-122. 14p. |
| Subjects: | Vibration isolation, Black holes, Lamb waves, Rayleigh-Ritz method, Negative refraction, Structural plates |
| Abstract: | Acoustic black holes (ABHs) in plates have shown great potential in a variety of applications that range from passive noise and vibration reduction, to energy harvesting thanks to localization, or to unusual flexural wave manipulation like lensing, or negative refraction and bi-refraction. The ABH effect can be typically achieved in plates by embedding regular arrays of circular cuneate indentations, with power-law profile. In this paper, we suggest new ring-shaped ABH designs that may be used for vibration isolation. Many common situations in the vibroacoustics of built-up structures involve wave propagation in plates excited at a small source area. This could be the case, for instance, of a beam/plate connection. It is herein proposed to surround the plate excitation region by means of ring-shaped ABHs to prevent the transmission of vibrations outside them. Several configurations of ABHs are tested, from concentric annular ABHs in different number and sizes to traditional circular ABHs in a ring arrangement. The inclusion of stiffeners to prevent excessive structural plate weakness due to the ABH indentations is also addressed. The performance of the ABH designs are analyzed by means of a semi-analytical approach that uses two-dimensional Gaussian functions to approximate the plate flexural displacement field, in the framework of the Rayleigh-Ritz method. The annular ABHs are shown to exhibit remarkable good isolation for the whole frequency range. An explanation is provided for their behavior. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Sound & Vibration is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 137777796 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Ring-shaped acoustic black holes for broadband vibration isolation in plates. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Deng%2C+Jie%22">Deng, Jie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guasch%2C+Oriol%22">Guasch, Oriol</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> oriol.guasch@salle.url.edu</i><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Ling%22">Zheng, Ling</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Sound+%26+Vibration%22">Journal of Sound & Vibration</searchLink>. Oct2019, Vol. 458, p109-122. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Vibration+isolation%22">Vibration isolation</searchLink><br /><searchLink fieldCode="DE" term="%22Black+holes%22">Black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Lamb+waves%22">Lamb waves</searchLink><br /><searchLink fieldCode="DE" term="%22Rayleigh-Ritz+method%22">Rayleigh-Ritz method</searchLink><br /><searchLink fieldCode="DE" term="%22Negative+refraction%22">Negative refraction</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+plates%22">Structural plates</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Acoustic black holes (ABHs) in plates have shown great potential in a variety of applications that range from passive noise and vibration reduction, to energy harvesting thanks to localization, or to unusual flexural wave manipulation like lensing, or negative refraction and bi-refraction. The ABH effect can be typically achieved in plates by embedding regular arrays of circular cuneate indentations, with power-law profile. In this paper, we suggest new ring-shaped ABH designs that may be used for vibration isolation. Many common situations in the vibroacoustics of built-up structures involve wave propagation in plates excited at a small source area. This could be the case, for instance, of a beam/plate connection. It is herein proposed to surround the plate excitation region by means of ring-shaped ABHs to prevent the transmission of vibrations outside them. Several configurations of ABHs are tested, from concentric annular ABHs in different number and sizes to traditional circular ABHs in a ring arrangement. The inclusion of stiffeners to prevent excessive structural plate weakness due to the ABH indentations is also addressed. The performance of the ABH designs are analyzed by means of a semi-analytical approach that uses two-dimensional Gaussian functions to approximate the plate flexural displacement field, in the framework of the Rayleigh-Ritz method. The annular ABHs are shown to exhibit remarkable good isolation for the whole frequency range. An explanation is provided for their behavior. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Sound & Vibration is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jsv.2019.06.017 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 109 Subjects: – SubjectFull: Vibration isolation Type: general – SubjectFull: Black holes Type: general – SubjectFull: Lamb waves Type: general – SubjectFull: Rayleigh-Ritz method Type: general – SubjectFull: Negative refraction Type: general – SubjectFull: Structural plates Type: general Titles: – TitleFull: Ring-shaped acoustic black holes for broadband vibration isolation in plates. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Deng, Jie – PersonEntity: Name: NameFull: Guasch, Oriol – PersonEntity: Name: NameFull: Zheng, Ling IsPartOfRelationships: – BibEntity: Dates: – D: 13 M: 10 Text: Oct2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 0022460X Numbering: – Type: volume Value: 458 Titles: – TitleFull: Journal of Sound & Vibration Type: main |
| ResultId | 1 |
