Abstract
This paper presents the results of experimental and analytical studies of the performance of a particle damper using metallic hollow spheres in a vertically vibrating system. The metallic hollow sphere is made of steel and the density is almost the same as that of plastics. It is expected that the particle dampers with metallic hollow spheres can be applied in extreme temperature environment. The dynamics of the damper is solved by means of the Discrete Element Method (DEM). The validity of this numerical method is examined by comparison with the experimental results. It is shown that the mass ratio and the cavity dimensions influence the damping performance.
