Vibration Analysis of Elevator Rope with Vibration Suppressor

Abstract

The lateral vibration of elevator ropes for high-rise buildings, which is forcibly excited by the displacement of the building induced by wind force, is numerically analyzed, and a new practical method of reducing rope vibration by using vibration suppressors is proposed for relaxing the restricted elevator operation. Finite difference analyses of rope vibration with/without vibration suppressors are performed. The advantage of using vibration suppressors for reducing lateral vibration of the rope is demonstrated through numerical calculation: The resonant position of a rope with vibration suppressors greatly depends on the position of the vibration suppressors. When the vibration suppressors are uniformly installed along the full length of the rope, the maximum rope deflection becomes smaller as the number of vibration suppressors is made greater. It is also shown that the calculated results of the reaction force from the vibration suppressor are in fairly good agreement with the experimental results.