Research on bandgap characteristics of locally resonant stiffened plate structures

Abstract

In order to reduce the vibration of the stiffened plate, this paper presents a stiffened plate structure with a local resonance unit of the spring oscillator arranged periodically on the side of the stiffened plate without the stiffened bar, and studies the energy band structure and transmission characteristics of the structure. The band structure analysis shows that two band gaps are formed in the structure. The frequency range of the first band gap is 1165.23~1300.45Hz, and the frequency range of the second band gap is 198.97~243.88Hz. Furthermore, the influences of lattice constant, matrix mass ratio of the stiffened plate to the vibrator mass ratio, and the resonator spring stiffness on the band gap range are further analyzed. The transmission characteristics of local resonance stiffened plate structure with finite period are analyzed. These research structures provide important theoretical basis and technical support for vibration reduction design of stiffened plate structure.