Title:
Analysis of Vibration of 2-D Periodic Cellular Structures

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dc.contributor.advisor Ruzzene, Massimo
dc.contributor.author Jeong, Sang Min en_US
dc.contributor.committeeMember Cunefare, Kenneth A.
dc.contributor.committeeMember Hanagud, Sathyanaraya
dc.contributor.committeeMember Hodges, Dewey H.
dc.contributor.committeeMember Jacobs, Laurence J.
dc.contributor.department Aerospace Engineering en_US
dc.date.accessioned 2005-09-16T15:00:21Z
dc.date.available 2005-09-16T15:00:21Z
dc.date.issued 2005-05-19 en_US
dc.description.abstract The vibration of and wave propagation in periodic cellular structures are analyzed. Cellular structures exhibit a number of desirable multifunctional properties, which make them attractive in a variety of engineering applications. These include ultra-light structures, thermal and acoustic insulators, and impact amelioration systems, among others. Cellular structures with deterministic architecture can be considered as example of periodic structures. Periodic structures feature unique wave propagation characteristics, whereby elastic waves propagate only in specific frequency bands, known as "pass band", while they are attenuated in all other frequency bands, known as "stop bands". Such dynamic properties are here exploited to provide cellular structures with the capability of behaving as directional, pass-band mechanical filters, thus complementing their well documented multifunctional characteristics. This work presents a methodology for the analysis of the dynamic behavior of periodic cellular structures, which allows the evaluation of location and spectral width of propagation and attenuation regions. The filtering characteristics are tested and demonstrated for structures of various geometry and topology, including cylindrical grid-like structures, Kagom and eacute; and tetrhedral truss core lattices. Experimental investigations is done on a 2-D lattice manufactured out of aluminum. The complete wave field of the specimen at various frequencies is measured using a Scanning Laser Doppler Vibrometer (SLDV). Experimental results show good agreement with the methodology and computational tools developed in this work. The results demonstrate how wave propagation characteristics are defined by cell geometry and configuration. Numerical and experimental results show the potential of periodic cellular structures as mechanical filters and/or isolators of vibrations. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 31162266 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/7122
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Grid-like structures en_US
dc.subject Periodic lattices
dc.subject Directionality
dc.subject Mechanical pass-band filters
dc.subject Phononic band-gaps
dc.subject.lcsh Structural frames Vibration en_US
dc.subject.lcsh Wave-motion, Theory of en_US
dc.subject.lcsh Grillages (Structural engineering) Vibration en_US
dc.subject.lcsh Space frame structures Vibration en_US
dc.title Analysis of Vibration of 2-D Periodic Cellular Structures en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename College of Engineering
local.contributor.corporatename Daniel Guggenheim School of Aerospace Engineering
local.relation.ispartofseries Doctor of Philosophy with a Major in Aerospace Engineering
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
relation.isOrgUnitOfPublication a348b767-ea7e-4789-af1f-1f1d5925fb65
relation.isSeriesOfPublication f6a932db-1cde-43b5-bcab-bf573da55ed6
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