水平・鉛直方向振動を評価可能なエレベータロープモデルの構築

Abstract

Elevator ropes in a high-rise building are excited by deflection of building caused by earthquake and wind. Especially, the long-period ground motion causes the resonance between elevator ropes and building. As it causes severe damage for elevator, reducing the displacement of elevator rope is demanded. When the rope is long, it is difficult to ignore that the interaction between horizontal and vertical vibrations of rope. Currently, there are some methods to analyze the rope sway. But, the existence of universal method that can analyze the interaction between horizontal and vertical vibrations, and coincide with the experiments using actual elevator rope is very few. Therefore, in this study the new rope model is constructed as a multi rigid body pendulum, and I set the equation of motion by following the multi-body dynamics. And, the coincidence of the proposed model and the result of experiment are shown by numerical simulation. Furthermore, vertical or horizontal direction damping is added at the lower end of rope, and its effectiveness is confirmed.