Tingting Wang : "Acoustic/Elastic Wave Propagation in Coupled-Resonator Waveguides

Ting Ting Wang's PhD works : "Acoustic/Elastic Wave Propagation in Coupled-Resonator Waveguides"

This is a 'co-tutelle' defense between Beijing Jiaotong University in China and UBFC in France.

Abstract  : When a defect is introduced into a phononic crystal, states localized at the defect appear in the band gaps. They decay rapidly far away from the defect. Therefore, it is possible to localize and guide wave propagation by designing defects in the perfect phononic crystal. Coupled-resonator waveguides based on the coupling effect between a sequence of defect cavities have simultaneously strong wave confinement and low group velocity, and can be used to design rather arbitrary circuits. Furthermore, the propagation of elastic waves in a solid matrix can be controlled through changing fluid fillings based on fluid-solid interaction. Thus, they have essential applications in vibration reduction and noise isolation. In this thesis, the acoustic and elastic waves propagating in both periodic and aperiodic coupled-resonator waveguides are investigated. The fluid-solid interaction in fluid/solid phononic crystals is studied. The work is conducted by combining numerical simulations, theoretical model analysis and experimental investigations.

 Jury  Composition :

Yue-Sheng WANG, Professor, Beijing Jiaotong University, Co-PhD  director

Thomas BRUNET, Maître de conférences, Université de Bordeaux, Reporter

Chang-Qing CHEN, Professor, Tsinghua University, Reporter

Vincent LAUDE, Researh Director, Université Bourgogne-Franche-Comté, PhD Director

Yan-Feng WANG, Associate Professor, Tianjin University, Reviewer,

Geng-Kai HU, Professor, Beijing Institute of Technology, Reviewer

Yan PENNEC, Professor, Université de Lille, Reviewer

Franck CHOLLET, Professeur, Université Bourgogne-Franche-Comté, Reviewer

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