Numerical simulation of vibration damping by granular materials

M. Takeshima, T. Asakura

Research output: Contribution to journalArticle

Abstract

The present paper proposes a novel simulation method combining the finite-difference time-domain (FDTD) method and the discrete-element method (DEM) in order to investigate the damping effect of bending vibration of a plate caused by granular materials. The DEM is used to obtain the motion of the granular material, whereas the FDTD is used for vibration analysis of the plate-like structure. Firstly, the numerical scheme of each method and the coupling scheme of these methods are described in detail. Then, the validity of the proposed method was confirmed by comparing the calculation and measurement results. Finally, based on the numerical and measurement results, we confirmed that the damping of the plate caused by additionally arranged granular materials varies greatly depending on the excitation force acting on the plate.

Original languageEnglish
Article number107189
JournalApplied Acoustics
Volume162
DOIs
Publication statusPublished - May 2020

Fingerprint

vibration damping
granular materials
simulation
damping
bending vibration
finite difference time domain method
vibration
excitation

Keywords

  • Discrete-element method
  • Finite-difference time-domain method
  • Vibration damping

Cite this

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Numerical simulation of vibration damping by granular materials. / Takeshima, M.; Asakura, T.

In: Applied Acoustics, Vol. 162, 107189, 05.2020.

Research output: Contribution to journalArticle

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AB - The present paper proposes a novel simulation method combining the finite-difference time-domain (FDTD) method and the discrete-element method (DEM) in order to investigate the damping effect of bending vibration of a plate caused by granular materials. The DEM is used to obtain the motion of the granular material, whereas the FDTD is used for vibration analysis of the plate-like structure. Firstly, the numerical scheme of each method and the coupling scheme of these methods are described in detail. Then, the validity of the proposed method was confirmed by comparing the calculation and measurement results. Finally, based on the numerical and measurement results, we confirmed that the damping of the plate caused by additionally arranged granular materials varies greatly depending on the excitation force acting on the plate.

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