１つの変位センサによるかご室昇降中のエレベーターロープの地震時横振動推定

抄録

During an earthquake, elevator operation is restricted by controlled operation because the elevator ropes resonate with the building sway. In this paper, based on the assumption that the elevator can operate even in the event of an earthquake if the vibration of the rope can be estimated and confirmed to be small, an estimation method of lateral vibration of elevator ropes excited by an earthquake while car driving is proposed. In this method, the vibration of the entire rope is estimated by performing a Short Time Fourier Transform on displacement data near the traction sheave and determining the amplitude of each vibration mode of the rope from the amplitude and phase spectra. The estimation accuracy of the proposed method was verified for a main rope excitated by earthquake. The analysis was performed using two types of earthquakes, and it was confirmed that the increase or decrease in rope displacement could be estimated for one earthquake, while for the other earthquake, it was estimated with a large error. Regarding the error, it is possible that the natural frequency of the rope is far from the natural frequency of the building that the rope vibrated at the natural frequency of the building without resonating.