TY - GEN
T1 - Design of frequency bandgaps in 3D woodpile metamaterials
AU - Kim, Eunho
AU - Jang, Yeongtae
N1 - Publisher Copyright:
© Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020. All rights reserved.
PY - 2020/8/23
Y1 - 2020/8/23
N2 - We study wave propagations in a stack of slender beams, which are so-called woodpile metamaterials. Slender beams have multiple low frequency bending vibration modes, which are strongly coupled with waves propagating through the woodpile structure. The frequency band structure of the woodpile varies depending on various parameters, such as contact locations in each beam, vibration mode shapes of the beam, pre-compressed force, etc. To understand the wave dynamics in this complex system, we numerically analyzed the wave dynamics in the woodpile structures. We first develop a simplified discrete element model that can represent the frequency band structures of the complex 3D woodpile structure. Then we investigate the effects of the design parameters on the frequency band structure. We confirm that the developed DEM is a highly efficient tool to design 3D woodpile metamaterials.
AB - We study wave propagations in a stack of slender beams, which are so-called woodpile metamaterials. Slender beams have multiple low frequency bending vibration modes, which are strongly coupled with waves propagating through the woodpile structure. The frequency band structure of the woodpile varies depending on various parameters, such as contact locations in each beam, vibration mode shapes of the beam, pre-compressed force, etc. To understand the wave dynamics in this complex system, we numerically analyzed the wave dynamics in the woodpile structures. We first develop a simplified discrete element model that can represent the frequency band structures of the complex 3D woodpile structure. Then we investigate the effects of the design parameters on the frequency band structure. We confirm that the developed DEM is a highly efficient tool to design 3D woodpile metamaterials.
UR - https://www.scopus.com/pages/publications/85101310169
M3 - Conference paper
AN - SCOPUS:85101310169
T3 - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
BT - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
A2 - Jeon, Jin Yong
PB - Korean Society of Noise and Vibration Engineering
T2 - 49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
Y2 - 23 August 2020 through 26 August 2020
ER -