Vibration Analysis of Elevator Rope(Simplified Calculation Method for Detecting Rope Deflection of Moving Cage during Earthquake)

Kimura, Hiroyuki; Min, Zi; Ishii, Takashi; Yamamoto, Akira; SHIBA, Hiroyuki

doi:10.1299/kikaic.77.43

Cited by 4 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, for the main rope ( Fig. 1) which resonates only once during up-and-down movement of the cage (rope length varies) with the natural frequency of a building, the simplified calculation method has been improved, and it is shown that it has practically sufficient accuracy (within ±20% of error with the calculated result by a finite difference method) (9) .…”

Section: Journal Of System Design and Dynamicsmentioning

confidence: 99%

“…The response of buildings, when earthquake waves are inputted, are calculated by using 20-degree-of-freedom model (8), (9) . Seven cases (32m, 60m, 80m, 100m, 120m, 180m, and 240m) of building height H are used for calculation.…”

Section: Buildingmentioning

confidence: 99%

“…In addition, in order to maintain the continuity of potential energy and kinetic energy when changing the natural frequency of single-degree-of-freedom model in each calculation step, the following energy correction (9) is performed. 8Namely, the value which multiplied by…”

mentioning

confidence: 99%

See 2 more Smart Citations

Simplified Calculation Method for Detecting Elevator Rope Deflection during Earthquake (Considering the Distribution of Rope Tension)

Kimura

Kuguminato

2013

JSDD

Self Cite

View full text Add to dashboard Cite

When an elevator rope for a high-rise building is forcibly excited by long-period ground motion, rope displacement becomes large even if the ground acceleration is small. Therefore, detecting the rope sway in real time is important to avoid damage during and after earthquakes. In a previous paper, when elevator cage is moving, a simplified calculation method, based on a single-degree-of-freedom (SDOF) system, for estimating rope displacement during an earthquake by using the building acceleration and ground acceleration has been presented. This simplified calculation method is applied to main rope, which resonates only once with building's sway while the elevator is moving. In the case of the main rope, the results of this simplified calculation method agree with those of the conventional finite difference method (FDM), within the 20% error margin. In this paper, a simplified calculation method is applied to compensating rope, which resonates twice with building's sway while the elevator is moving, by considering distribution of the rope tension. Finite difference analyses of rope vibration are also performed to verify the validity of the simplified calculation method. The results of this simplified calculation method agree with those of the conventional finite difference method, within the +20%,-30% error margin.

show abstract

Section: Journal Of System Design and Dynamicsmentioning

confidence: 99%

Section: Buildingmentioning

confidence: 99%

See 1 more Smart Citation

Simplified Calculation Method for Detecting Elevator Rope Deflection during Earthquake (Considering the Distribution of Rope Tension)

Kimura

Kuguminato

2013

JSDD

Self Cite

View full text Add to dashboard Cite

show abstract

“…e dynamical responses of traditional lift systems have been thoroughly studied by many scholars. For example, Kimura et al [4] established a transverse vibration model for elevators and used a single-degree-offreedom system to analyse dynamical responses.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Dynamic Behavior Analysis of Rope‐Guided Traction System with Terminal Tension Acting on Compensating Rope

Wang

Cao

Wang

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

Traction systems are a good choice for high-rise lift systems, especially in deep wells. With increasing lift depth and weight, rope-guided traction systems have become an essential design methodology in the mine lift field. In this paper, a comprehensive mathematical model is established to simulate the dynamical responses of a rope-guided traction system with different terminal tensions acting on the compensating rope. The results and analysis presented in this paper reveal dynamical responses in terms of longitudinal and transverse vibration. Additionally, a wide range of resonances occurs in the target system. Differences in the dynamical responses between a traditional traction system and tensioned traction system are analysed in detail. Through comparison and analysis, it is determined that terminal tension plays an important role in the suppression of longitudinal vibration in a system. However, changes in the amplitude of longitudinal vibration are independent of terminal tension, which only affects longitudinal elastic elongation and does not affect the basic shape of longitudinal and transverse vibrations. Based on this analysis, it can be concluded that longitudinal vibration suppression can be achieved by applying proper tension on the compensating rope to ensure that it reaches a tensioning state. Continuing to increase terminal tension is not beneficial for the vibration suppression of a system. The results presented in this paper will serve as a valuable guide for the design and optimisation of traction systems.

show abstract

Proposal of simple decision procedure of optimum division position in long travel for vibration suppression of long component in elevator

Okamura¹,

FUJITA

Murata

et al. 2022

Transactions of the JSME (In Japanese)

View full text Add to dashboard Cite

Elevators are essential for means of vertical transportation. Recently elevators, which are installed in high buildings, are long stroke. These elevator ropes are longer than conventional elevator ropes. The natural period of the elevator rope becomes longer for the long elevator rope. The natural period of the elevator rope gets closer to that of the building. The elevator ropes severely vibrate by the external force, such as strong winds and earthquakes. Accordingly, the division of lift stroke has been suggested for decrease of the rope response in the conventional research. The effectiveness of the lift stroke division has been confirmed by the investigation of the time history response analysis. However, the investigation of the optimum division position at the time history response analysis is taken tremendous effort. Accordingly, the simple design method of the optimum division position is necessary at the commencement of design. In this study, the simple decision procedure of the optimum division position is suggested. The optimum division position of the simple decision procedure is compared with the optimum division position of the time history response analysis. As a result, the calculation of the optimum division position is relatively simple and high precision. Furthermore, the sensitivity analysis of the simple decision procedure is carried out. As a result, the initial tension fluctuation has small influence against the optimum division position. Therefore, the simple decision procedure proposed in this study is effective method at the commencement of design.

show abstract

Vibration Analysis of Elevator Rope(Simplified Calculation Method for Detecting Rope Deflection of Moving Cage during Earthquake)

Cited by 4 publications

References 3 publications

Simplified Calculation Method for Detecting Elevator Rope Deflection during Earthquake (Considering the Distribution of Rope Tension)

Simplified Calculation Method for Detecting Elevator Rope Deflection during Earthquake (Considering the Distribution of Rope Tension)

Modeling and Dynamic Behavior Analysis of Rope‐Guided Traction System with Terminal Tension Acting on Compensating Rope

Proposal of simple decision procedure of optimum division position in long travel for vibration suppression of long component in elevator

Contact Info

Product

Resources

About