Abstract
An elevator rope for high-rise building is forcibly excited by the displacement of the building caused by earthquakes and wind forces. In high-rise building, the elevator rope may resonate with the natural frequency of the building; hence, effective solution to reduce the rope displacement is demanded. In this paper, it is confirmed to suppress of the transverse vibration of elevator rope using vertical vibration of counterweight. Rope lateral vibration is controlled by fluctuating rope tension using up-and-down motion of this counterweight. Finite difference analyses of rope vibration with counterweight are performed to verify of this method. Experiments involving forced vibration of a rope whose length is constant are performed. The optimal natural frequency of vertical vibration is about 2 times of the natural frequency of the rope.
