VIBRATION ISOLATING MEMBER

摘要

PROBLEM TO BE SOLVED: To adjust a spring constant and a loss coefficient which are vibration isolating factors, in a wide range by filling granular material in a container to form a vibration isolating member. SOLUTION: This vibration isolating member 5 used to support the flexible structure of a vibrating body 6 of a structure or equipment is constituted by filling granular material 2... such as glass beads in a container 1. In order to support the vibrating body 6 of 1 kg in mass in the vibration isolating state, a large number of granular material 2 with the grain diameterϕ125μm are filled in the cylindrical container 1 with the inner diameterϕ50 m. A side wall part 3 of the container 1 of the vibration isolating member 5 is smaller in rigidity than the granular material 2 so that the side wall part 3 of the container 1 swells outward when receiving vibration, thus avoiding the granular material 2 being influenced by the rigidity of the side wall part 3. If necessary, viscoelastic material grain 4 formed of rubber material can be mixed in the powder and grain material 2. Frictional contact damping between the grains of the granular material 2 is therefore increased to adjust loss in a wide range.