Enhancement of particle damping effectiveness using multiple cell enclosure

Abstract

Particle damping is a passive damping technique in which small metal particles are placed in the enclosure attached to the vibrating structure at the highest amplitude region. The damping effectiveness of the particle damper has been studied using particle-filled enclosure attached to the free end of a cantilever beam. The optimum size of the single cell enclosure is selected based on experimental analysis and modified as a multiple cell enclosure, which enhances the damping effectiveness. The single cell and multiple cell enclosures are tested keeping the mass of particles constant, which reveals that damping effectiveness is increased significantly using a multiple cell enclosure. A mathematical model has been proposed for a single cell enclosure using the dimensional analysis method. This model is modified for multiple cell enclosure based on a correlation between displacement amplitudes corresponding to resonance for single cell and multiple cell enclosures. It is observed that there is a good correlation between analytical and experimental results.