Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Dynamic force generator
Patent
1994-07-05
1996-08-13
Safavi, Michael
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Dynamic force generator
521671, E04H 902, E04B 198
Patent
active
055444520
ABSTRACT:
A passive vibration-damping unit in which movable upper members with a weight mounted thereon are superposed on fixed lower members with roller members interposed therebetween is installed in a highest story of a high-rise building. An active vibration-damping unit for actively causing the movable upper members of the passive vibration-damping unit to move in a shaking manner by means of a servo motor is incorporated in the passive vibration-damping unit. When the vibration of the building has occurred, the weight is allowed to move forcibly in the vibration-damping direction by means of the active vibration-damping unit. When the vibration has reached a limit value of the relative displacement of the active vibration-damping unit or a limit value of the torque of the servo motor, only the operation of the passive vibration-damping unit is continued. When the vibration has subsided to a certain extent, the active vibration-damping unit is operated again.
REFERENCES:
patent: 2035143 (1936-03-01), Cavaglieri
patent: 5046290 (1991-09-01), Ishit et al.
patent: 5255764 (1993-10-01), Kurabayashi et al.
patent: 5421129 (1995-06-01), Sakamoto et al.
Fujita Takafumi
Inaba Kanemasa
Kawai Nobuyasu
Kurimoto Kurimoto
Mochimaru Masami
Oiles Corporation
Okumura Corporation
Safavi Michael
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