正弦波振動する建物内を昇降するエレベータのロープ振動と付加張力の関係

DOI Web Site Web Site 被引用文献1件 参考文献10件

書誌事項

タイトル別名
  • RELATION BETWEEN THE TENSION LOAD AND ROPE SWAY OF AN ELEVATOR OPERATING IN A BUILDING UNDER SINUSOIDAL EXCITATION
  • 正弦波振動する建物内を昇降するエレベータのロープ振動と付加張力の関係 : 地震時にエレベータのかご室が昇降するためのアクティブ振動制御(その1)
  • セイゲンハ シンドウ スル タテモノ ナイ オ ショウコウ スル エレベータ ノ ロープ シンドウ ト フカ チョウリョク ノ カンケイ : ジシンジ ニ エレベータ ノ カゴベヤ ガ ショウコウ スル タメ ノ アクティブ シンドウ セイギョ(ソノ 1)
  • Active vibration control for the operation of an elevator during an earthquake: Part 1
  • 地震時にエレベータのかご室が昇降するためのアクティブ振動制御　その１

この論文をさがす

抄録

<p> Elevators cannot be used during an earthquake and tend to be out of service long after a large earthquake. This unavailability poses difficulties in evacuation and rescue. It is thus important to change the operation of elevators so that the rules governing elevator operation during an earthquake can be changed.</p><p> The operation of elevators during an earthquake requires the suppression of vibration of the whole elevator system, and especially ropes, in a vibrating building. The present study proposes a vibration control method of a main rope and a compensation rope using a tensional control force during an earthquake. This paper, which reports Part 1 of the study, presents the relation between the control force (tension load) and rope sway of an elevator operating in a building using sinusoidal excitations as a first step.</p><p> In Chapter 2 of the paper, an analysis model that consists of a main rope, car, compensation rope, compensating sheave, and active control device is derived using a partial differential equation. Relations among excitation frequencies, tension loads, and maximum rope-sway amplitudes for each rope are then presented for several car positions in Chapter 3. In the case of the main rope, the tension load affects the maximum amplitude of rope sway. However, because the mass of the car is great, the tension load has less effect on the natural frequency of the main rope. By contrast, in the case of the compensation rope, there is correlation among the excitation frequency, tension load, and maximum rope-sway amplitude. The correlation is positive or negative depending on the car position, because the natural frequencies of the compensation rope do not greatly differ among one another. The position of the car can thus be taken as a parameter for control design.</p><p> Finally, the effect of the motion of the car during excitation is presented in Chapter 4. Two car motions, upward motion and downward motion, are analyzed in a vibrating building. The results indicate the possibility that the control performance can be improved by considering both the time-varying car position and phase of the external force for vibration control by raising the tension device.</p><p> The following conclusions are drawn from the results of this paper.</p><p>・ The tensional control force does not strongly affect the natural frequency but does affect the maximum response of the main rope.</p><p>・ The natural frequency of the compensation rope is positively correlated with the control force, and a resonant condition can thus be avoided using the control force. By contrast, the natural frequencies are located near each other when the car remains on higher floors of the building. This may result in unexpected resonance due to the control force.</p><p>・ The control force strongly affects the compensation rope during upward motion and the main rope in a low-frequency building vibration.</p><p>・ The position of the car and the phase of the external force can be taken as parameters in the design of an active control force for the use of an elevator during an earthquake.</p><p> In future work, a control method based on time-varying natural frequencies of the ropes associated with the car motion, as shown in this paper, will be formulated and its efficiency will be verified using seismic motions.</p>

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (10)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ