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

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 11
  • Download : 0
The 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.
Advisors
Jeon, Wonjuresearcher전원주researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2018.2,[iii, 37 p. :]

Keywords

Hierarchical structure▼aPhononic crystals▼aBandgap▼aDouble negative effective material properties; 계층구조▼a음향자 결정구조▼a밴드갭▼a이중 음의 유효 물성

URI
http://hdl.handle.net/10203/265943
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733736&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0