Modal Overlap Factor of a beam with an acoustic black hole termination
Identifieur interne : 000D53 ( Main/Exploration ); précédent : 000D52; suivant : 000D54Modal Overlap Factor of a beam with an acoustic black hole termination
Auteurs : Vivien Denis [France] ; Adrien Pelat [France] ; François Gautier [France] ; Benjamin Elie [France]Source :
- Journal of Sound and Vibration [ 0022-460X ] ; 2014.
English descriptors
Abstract
Acoustic Black Hole (ABH) effect is a passive vibration reduction technique which takes advantage of properties of wave propagation in thin structures of varying thickness. A practical implementation of ABH on a uniform beam consists in an extremity whose thickness follows a power-law profile covered by a very thin layer of additional damping material. A modal analysis based on a High Resolution technique shows that the ABH significantly increases the Modal Overlap Factor (MOF) of the beam, thus reducing the resonant behaviour of the structure. Further investigations, including a two dimensional numerical model of the structure based on the finite difference method, show that this MOF can be explained by an increase of the modal density and a high damping of a number of modes of the structure due to the ABH.
Url:
DOI: 10.1016/j.jsv.2014.02.005
Affiliations:
- France
- Grand Est, Lorraine (région), Pays de la Loire
- Le Mans, Metz, Nancy
- Université de Lorraine, Université du Maine
Links toward previous steps (curation, corpus...)
- to stream Hal, to step Corpus: 003244
- to stream Hal, to step Curation: 003244
- to stream Hal, to step Checkpoint: 000D21
- to stream Main, to step Merge: 000D55
- to stream Main, to step Curation: 000D53
Le document en format XML
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CS 25233 - 54052 Nancy cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-lorraine.fr/</ref></desc></org></tutelle><tutelle name="UMR7503" active="#struct-441569" type="indirect"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><settlement type="city">Metz</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université de Lorraine</orgName></affiliation></author></analytic><idno type="DOI">10.1016/j.jsv.2014.02.005</idno><series><title level="j">Journal of Sound and Vibration</title><idno type="ISSN">0022-460X</idno><imprint><date type="datePub">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>acoustic black hole</term><term>damping</term><term>flexural vibration</term><term>modal analysis</term><term>passive damping technique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Acoustic Black Hole (ABH) effect is a passive vibration reduction technique which takes advantage of properties of wave propagation in thin structures of varying thickness. A practical implementation of ABH on a uniform beam consists in an extremity whose thickness follows a power-law profile covered by a very thin layer of additional damping material. A modal analysis based on a High Resolution technique shows that the ABH significantly increases the Modal Overlap Factor (MOF) of the beam, thus reducing the resonant behaviour of the structure. Further investigations, including a two dimensional numerical model of the structure based on the finite difference method, show that this MOF can be explained by an increase of the modal density and a high damping of a number of modes of the structure due to the ABH.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li><li>Pays de la Loire</li></region><settlement><li>Le Mans</li><li>Metz</li><li>Nancy</li></settlement><orgName><li>Université de Lorraine</li><li>Université du Maine</li></orgName></list><tree><country name="France"><region name="Pays de la Loire"><name sortKey="Denis, Vivien" sort="Denis, Vivien" uniqKey="Denis V" first="Vivien" last="Denis">Vivien Denis</name></region><name sortKey="Elie, Benjamin" sort="Elie, Benjamin" uniqKey="Elie B" first="Benjamin" last="Elie">Benjamin Elie</name><name sortKey="Gautier, Francois" sort="Gautier, Francois" uniqKey="Gautier F" first="François" last="Gautier">François Gautier</name><name sortKey="Pelat, Adrien" sort="Pelat, Adrien" uniqKey="Pelat A" first="Adrien" last="Pelat">Adrien Pelat</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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