Theoretical study on phononic crystals and acoustic metamaterials with structural hierarchy = 계층구조를 가지는 음향자 결정구조와 음향 메타물질에 대한 이론적 연구

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dc.contributor.advisorJeon, Wonju-
dc.contributor.advisor전원주-
dc.contributor.authorLee, Ki Yong-
dc.date.accessioned2019-08-28T02:44:46Z-
dc.date.available2019-08-28T02:44:46Z-
dc.date.issued2018-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733736&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/265943-
dc.description학위논문(석사) - 한국과학기술원 : 기계공학과, 2018.2,[iii, 37 p. :]-
dc.description.abstractThe purpose of this study is to establish a theoretical framework on the bandgap performance and double negative effective material properties of phononic crystals with a hierarchical structure and to design the hierarchical phononic crystals for practical engineering problems. The reflection coefficients of the hierarchical phononic crystals are formulated as an exact and concise form expressed by material properties and geometrical parameters. The hierarchical phononic crystals have stopbands in wide frequency ranges compared to the conventional phononic crystals. The frequency-dependent effective material properties of the hierarchical phononic crystals are derived through a dynamic homogenization theory and double negative effective properties are obtained in a certain passband. In addition, by using the geometrical advantages of the structural hierarchy, the hierarchical phononic crystals are designed for filtering the multiple target frequencies and obtaining the target material properties with double negativity.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectHierarchical structure▼aPhononic crystals▼aBandgap▼aDouble negative effective material properties-
dc.subject계층구조▼a음향자 결정구조▼a밴드갭▼a이중 음의 유효 물성-
dc.titleTheoretical study on phononic crystals and acoustic metamaterials with structural hierarchy = 계층구조를 가지는 음향자 결정구조와 음향 메타물질에 대한 이론적 연구-
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :기계공학과,-
dc.contributor.alternativeauthor이기용-
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ME-Theses_Master(석사논문)
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