Resonances and vibrations in an elevator cable system due to boundary sway

Gaiko, Nick V.; Horssen, Wim T. van

doi:10.1016/j.jsv.2017.11.054

Cited by 35 publications

(34 citation statements)

References 18 publications

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“…Assuming the axial vertical velocity of the beam was constant, the lateral vibration of the wire rope under the action of wind vibration was analyzed by singular perturbation theory. e numerical method was also used to verify the calculation results [10]. Fan and Zhu used the singularity free beam to model the elevator steel wire rope, analyzed the natural frequency and vibration mode of the steel wire rope after the change of the elevator car position, and compared with the results of ABAQUS analysis in parallel [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Theoretical Model and Test Method of Vertical Vibration of Elevator Traction System

Peng

Jiang

Yuan

et al. 2020

Mathematical Problems in Engineering

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In order to study the dynamic characteristics of the elevator, the response characteristics of the elevator under normal operation and emergency braking conditions are analyzed. In this paper, the centralized mass discretization model is used to study the vibration characteristics of the elevator traction system under the external excitation. Firstly, the vibration equation of the elevator multi-degrees-of-freedom (abbreviated as DOF) system is established. en, the vibration characteristics of the three DOF system are analyzed, and the natural frequencies and modes are obtained. e free vibration equation and forced vibration equation are obtained, and the theoretical solutions are obtained. Finally, the test method proposed in this paper is used to test the normal operation and emergency braking of the elevator. e test results show that, under normal operation conditions, the measured speed and distance errors are not more than 4.2%, the up running distance measured by the elevator is larger than the actual value, while the down running distance is smaller than the actual value; under emergency braking condition, because the steel wire rope can only bear the pulling force, the peak acceleration fluctuation in the up emergency braking process is large, while the down emergency braking acceleration fluctuation is small. erefore, the elevator vibration analysis model and the vibration test method proposed in this paper can be used for the analysis of elevator dynamic performance, which has great reference value for the safety performance research of the elevator traction system.

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Section: Introductionmentioning

confidence: 99%

Study on Theoretical Model and Test Method of Vertical Vibration of Elevator Traction System

Peng

Jiang

Yuan

et al. 2020

Mathematical Problems in Engineering

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“…The vibration impact produces not only longitudinal tension, but also horizontal and torsional vibration due to the transmission of the shock wave [6,7]. Especially when the depth and speed of the mine are continuously increasing, the time-varying characteristics of the rope length and the swirl of the wellbore gas flow [8] at the bottom of the container caused by the rapid speed change will intensify the vibration [3,9]. When the vibration is transmitted upward to the friction pulley along the rope, it leads to abnormal contact, dynamic slip and even disengagement [10] between the rope and pulley, which will seriously reduce the friction stability.…”

Section: Introductionmentioning

confidence: 99%

A New Transmission Theory of “Global Dynamic Wrap Angle” for Friction Hoist Combining Suspended and Wrapped Wire Rope

Guo

Zhang

et al. 2020

Applied Sciences

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A new transmission theory of "global dynamic wrap angle" for friction hoist is proposed. The theory is based on a mine hoist simulation model which combines the suspended rope with the wrapped rope. Rope dynamics in a suspended section are verified by the field experiment results. The theory holds that the mechanical state of wire rope is dynamic through the whole wrap angle, including deformation, contact and friction. When the rope enters the wrap angle, it provides positive friction and changes direction at a certain boundary point. The demarcation of the boundary depends on the rope load on both sides of the friction pulley. The theory is suitable for accurately analyzing the kinetics of high-speed and heavy-load friction hoisting.

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“…ere are few literatures on nonlinear vibration behavior of the coal mine hoist. e kinematic and dynamic model of the mine hoisting system is similar to the elevator system or the axially moving system [9][10][11][12][13][14][15][16][17][18][19][20][21]. e stability problem of a nonlinear system is considered [22].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling and Analysis of a Mine Hoisting System with Constant Length and Variable Length

Wang

Xiao

Liu

2019

Mathematical Problems in Engineering

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A coal mine hoisting system includes two parts, one is a constant-length cable system, and the other is a variable-length cable system. In this paper, the nonlinear dynamic modeling of a coal mine hoisting system is established through Hamilton’s principle. The nonlinear partial differential equations of the coal mine hoisting system are discretized into ordinary differential equations by the fourth-order Galerkin truncation. The nonlinear dynamic responses and four key kinematic and structural parameter analysis of the coal mine hoisting system in the acceleration phases, constant velocity phases, and deceleration phases are given. The results show that the axial vibration displacements of the constant-length cable are an order of magnitude smaller than that of the variable-length cable. The load has the greatest effect on the axial vibration displacement of the hoisting cable. Adversely, the speed has the least effect on the axial vibration displacement of the hoisting cable.

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Resonances and vibrations in an elevator cable system due to boundary sway

Cited by 35 publications

References 18 publications

Study on Theoretical Model and Test Method of Vertical Vibration of Elevator Traction System

Study on Theoretical Model and Test Method of Vertical Vibration of Elevator Traction System

A New Transmission Theory of “Global Dynamic Wrap Angle” for Friction Hoist Combining Suspended and Wrapped Wire Rope

Dynamic Modeling and Analysis of a Mine Hoisting System with Constant Length and Variable Length

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