Development of restraint method for elevator rope sway at the time of an earthquake

2018 Fiscal Year Final Research Report

• Project/Area Number: 15K05859
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: University of Toyama
• Principal Investigator: KIMURA Hiroyuki 富山大学, 大学院理工学研究部(工学), 教授 (50579315)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: エレベータ・ロープ / ロープスウェイ / 変位拘束部材 / 動吸振器 / 周波数応答特性

Outline of Final Research Achievements

①A method to reduce the rope sway is proposed by using dynamic damper. Rope lateral vibration is controlled by fluctuating rope tension using up-and-down motion of this dynamic damper. The method to determine the optimal parameter of this dynamic damper is also shown.
②Finite difference analysis of the rope vibration with vibration suppressor is performed to obtain the frequency response curves. Resonance frequencies obtained by the finite difference analyses are in good agreement with the natural frequencies for the free vibration. Vibration modes obtained by the finite difference analyses are similar to that for the free vibration.
③To estimate influence of the vibration suppressor more correctly, a method to identify the flexural rigidity, the viscous damping and the structural damping of the rope is indicated.

Free Research Field

機械力学

Academic Significance and Societal Importance of the Research Achievements

①変位拘束部材を有するロープの振動解析をする際に、幾何学的に非線形なロープの自由振動を線形の強制振動に置き換えて理論解析する方法を示す等、学術的意義がある一方で、②閉じ込め事故の防止やエレベータ復旧時間の大幅な短縮等に応用でき、高層ビルを利用または居住している人の安全性や地震後の利便性を高めることができるという社会的意義がある。