鉛直方向に設置した空気流入型粒状体ダンパの減衰力特性

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  • Damping Force Properties of Air Inflow Type Particles Damper Installed in Vertical Direction

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<p>In this study, influence that the damping force properties of the damper using particle assemblage with the damper received from flow rate of the inflow air were investigated experimentally. The damper was filled by the zirconia balls. Three types of zirconia balls with different diameters ware prepared. The packing fraction of each zirconia balls was set to 0.580. The damper was installed on the vertical direction. The air was poured into the damper from bottom side holes, and the air was poured into outside from upper side holes of the damper. The damping forces were measured when a sinusoidal forced displacement with a frequency of 1 Hz and an amplitude of 5 mm was applied. The damping force of the damper changed greatly depending on the displacement direction of the piston. The damping force was very small when the piston was displaced upward. On the other hand, when the piston was displaced downward, the damping force increased with the displacement of the piston. The damping force decreased as the air flow rate increased.</p>

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