Study on bandgap characteristics of particle damping phononic crystal. (September 2020)

• Record Type: Journal Article
• Authors: Wang, Chiming; Xiao, Wangqiang; Wu, Dehui; Wang, Sheng; Lin, Changming; Luo, Yuanyi; Xiao, Jingjing; Yao, Kaihan; Xu, Zhanhao
• Is Part Of: Applied acoustics. Volume 166(2020)
• Publication Date: 2020-09
• Subjects: Particle damping phononic crystal -- Equivalent analysis method -- Bandgap characteristics -- Vibration damping characteristics; Acoustical engineering -- Periodicals; Periodicals; 620.2
• DOI: 10.1016/j.apacoust.2020.107352
• Languages: English
• ISSNs: 0003-682X

Abstract

Graphical abstract: Highlights: An equivalent calculation method based on the discrete – continuum is first proposed. The response of the particle damping system can be solved by finite element method using the method above. The particle-damping phonon crystal has extremely wide-bandgap characteristics and full medium and low-frequency domain vibration damping characteristics. Abstract: In order to realize the engineering application of the phononic crystal structure, a phononic crystal plate structure based on particle damping was proposed in this paper. The theoretical analysis and experimental prediction show that the structure has excellent medium and low frequencies damping characteristics, extremely wide-bandgap and low-frequency domain vibration damping characteristics. The matched curves of the data results show that the equivalent damping particle continuum including the equivalent elastic modulus and dynamic Rayleigh damping coefficient ratio, is a nonlinear function of the vibration frequency.