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Article: Drum-like silencers using magnetic forces in a pressurized cavity

TitleDrum-like silencers using magnetic forces in a pressurized cavity
Authors
Issue Date2006
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jsvi
Citation
Journal Of Sound And Vibration, 2006, v. 297 n. 3-5, p. 895-915 How to Cite?
AbstractA feasibility study is carried out for utilizing magnetic force to yield a low-frequency shift of the transmission loss spectrum provided by a drum-like silencer consisting of two side-branch, rectangular cavities covered by ferromagnetic membranes. The results show that the transmission loss spectrum of the drum-like silencer is mainly controlled by the vibration of the first and second modes of the membrane. Three pairs of magnets are employed inside the cavity to promote the response of these modes. It is found that the magnetic force imposes both static and dynamic effects on the silencer. While the latter helps shift the effective region of the silencer towards lower frequencies, the former results in an increase of stiffness of the membrane which is detrimental to the operation of the silencer at low frequencies. Cavity pressurization is then proposed to neutralize the static effects of the magnetic force. A finite element model is developed to predict and optimize the performance of the proposed silencer with some of the results validated experimentally. The desired shift towards the lower frequency is validated although the silencer performance is still less than ideal due to both parametric and operational constraints of the rig. © 2006 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/75871
ISSN
2015 Impact Factor: 2.107
2015 SCImago Journal Rankings: 1.494
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChiu, YHen_HK
dc.contributor.authorCheng, Len_HK
dc.contributor.authorHuang, Len_HK
dc.date.accessioned2010-09-06T07:15:23Z-
dc.date.available2010-09-06T07:15:23Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Sound And Vibration, 2006, v. 297 n. 3-5, p. 895-915en_HK
dc.identifier.issn0022-460Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/75871-
dc.description.abstractA feasibility study is carried out for utilizing magnetic force to yield a low-frequency shift of the transmission loss spectrum provided by a drum-like silencer consisting of two side-branch, rectangular cavities covered by ferromagnetic membranes. The results show that the transmission loss spectrum of the drum-like silencer is mainly controlled by the vibration of the first and second modes of the membrane. Three pairs of magnets are employed inside the cavity to promote the response of these modes. It is found that the magnetic force imposes both static and dynamic effects on the silencer. While the latter helps shift the effective region of the silencer towards lower frequencies, the former results in an increase of stiffness of the membrane which is detrimental to the operation of the silencer at low frequencies. Cavity pressurization is then proposed to neutralize the static effects of the magnetic force. A finite element model is developed to predict and optimize the performance of the proposed silencer with some of the results validated experimentally. The desired shift towards the lower frequency is validated although the silencer performance is still less than ideal due to both parametric and operational constraints of the rig. © 2006 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jsvien_HK
dc.relation.ispartofJournal of Sound and Vibrationen_HK
dc.titleDrum-like silencers using magnetic forces in a pressurized cavityen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-460X&volume=297&spage=895&epage=915&date=2006&atitle=Drum-like+silencers+using+magnetic+forces+in+a+pressurized+cavityen_HK
dc.identifier.emailHuang, L:lixi@hku.hken_HK
dc.identifier.authorityHuang, L=rp00119en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jsv.2006.05.006en_HK
dc.identifier.scopuseid_2-s2.0-33747339938en_HK
dc.identifier.hkuros133795en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33747339938&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume297en_HK
dc.identifier.issue3-5en_HK
dc.identifier.spage895en_HK
dc.identifier.epage915en_HK
dc.identifier.isiWOS:000240768900028-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChiu, YH=14068552700en_HK
dc.identifier.scopusauthoridCheng, L=7403337597en_HK
dc.identifier.scopusauthoridHuang, L=7404735514en_HK

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