Numerical and experimental study of a sandwich-like metamaterial plate for vibration suppression. (15th April 2020)

• Record Type: Journal Article
• Authors: Li, Jinqiang Jinqiang; Fan, Xinlei; Li, Fengming
• Is Part Of: Composite structures. Volume 238(2020)
• Publication Date: 2020-04-15
• Subjects: Stopband -- Vibration attenuation -- Metamaterial plate -- Sandwich-like plate -- Local resonance; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.111969
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: This paper presents a design for a sandwich-like plate containing mass-beam resonators to obtain a specific and low-frequency stopband. The resonators consist of a cantilever beam and mass block and are fixed between the two faceplates of the sandwich-like plate. The traditional sandwich structure can't be used to control or isolate the vibration precisely in a specific frequency range. The stopband of the present sandwich-like plate can be easily changed by adjusting the geometry of the cantilever beam and the mass of the block. Using the energy method, the dispersion equation relating the frequency to the wave numbers is derived and the two bounds of the stopband are obtained by solving the dispersion equation. The vibration transmission of the sandwich-like plate is investigated using numerical calculation, finite element simulation, and experiments; a good agreement between the results of the three methods is obtained. The results show that the stopband is determined by the natural frequency of the resonators and the mass ratio of the resonators and faceplates; the stopband width is significantly affected by the damping ratio of the resonators. The results of this study will be useful for the design of plate structures with good vibration attenuation and isolation.