日本機械学会論文集
Online ISSN : 2187-9761
ISSN-L : 2187-9761
交通・物流
1個の変位拘束部材を有するエレベータ・ロープの振動解析
藤谷 高寛木村 弘之
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ジャーナル フリー

2018 年 84 巻 864 号 p. 18-00048

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When an elevator rope for a high-rise building is forcibly excited by the displacements of the building induced by wind forces and/or by long-period ground motion, rope displacement becomes large even if the ground acceleration and the buildings acceleration is small. To prevent this problem, vibration suppressors are used to change the natural frequency of the elevator rope and prevent resonance. The elevator rope is generally modeled using a string, and linear string vibration is well researched. However, the vibration of the string equipped with vibration suppressor encounters geometric nonlinearity, and hence, its characteristics have been studied under a few conditions. In this paper, theoretical solution to the free vibration of the rope is obtained, in the case where the position of vibration suppressor is L/N and the pulled position is (N-i)L/N. Where L is rope length, N and i are integer. Further, finite difference analysis of the rope vibration with vibration suppressor is also 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, and the number of resonance frequencies near original natural frequency is N-1 when position of vibration suppressor is L/N of the rope.

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