233 運動量交換型ダンパによる床重量衝撃音の低減

概要

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Floor impact sound in condominiums has been the important problem to live in comfort. Especially heavy impact sound caused by children's jumping on the floor is a serious problem because there is no effective devices to reduce that noise. In this study, a momentum exchanging damper was presented to reduce the impulsive vibration of the floor. This damper was composed of a spring, a dashpot and a mass which is adjacent to the floor surface. When a heavy impact source falls on the floor, the momentum of that source is transmitted to the damper through the floor, so the displacement of the floor could be reduced. Simulations and experiments were achieved to verify the effectiveness of the damper. It can be concluded that the damper significantly decreases the impulsive displacement of the floor and the impulsive force transmitted to slab from the floor.
2003-10-30