Coupled vibrations of rope-guided hoisting system with tension difference between two guiding ropes

Cao, Guohua; Wang, Jinjie; Zhu, Zhencai

doi:10.1177/0954406216677103

Cited by 13 publications

(10 citation statements)

References 38 publications

(50 reference statements)

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“…Here, the results reveal adverse dynamic behavior of the catenary largely due to the auto-parametric interactions between the in-and out-of-plane modes and finds out the resonance modal interactions can be avoided to a large extent if the winding velocity is increased to an appropriate level. The transverse response of cable-guided hoisting system with time-varying length and the influence of vessel eccentricity is studied in [8,9]. Here, the transverse response of the moving hoisting conveyance in cable-guided hoisting system is investigated in this paper.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior Analysis of a High-Rise Traction System with Tensioned Pulley Acting on Compensating Rope

et al. 2020

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In this paper, dynamic characteristics of the symmetrical traction system with tensioned pulley acting on compensating rope is theoretically investigated. Due to the excitations from drum, the traction system will occur longitudinal and transverse vibration. In order to explore the differences between traditional traction system and tensioned traction system with different tensioned methods and seek the optimal method of vibration suppression, the damping cylinder and terminal tension acting on compensating rope between tensioned pulley and ground are placed. Caused by the change of the rope’s property, the system will produce different dynamic responses. Here, the differential-algebraic equations (DAEs) are derived using Hamilton principle. The transverse and longitudinal nonlinear coupling of ropes are considered. The generalized- α method is selected to solve the DAEs. Based on the response characteristics of the system, the time-frequency characteristics with different terminal damping are obtained by CWT (continuous wavelet transform) and FFT (fast Fourier transform). From results, it can be seen that tensioned pulley plays an important role in suppressing transverse and longitudinal vibration of the symmetrical traction system compared with traditional traction system, especially by adding damping cylinder. The amplitude of system decreases exponentially with the increase of the terminal damping acting on tensioned pulley. Different running speeds of tensioned traction system are discussed. The results can inform the development of relevant mitigating strategies to minimize the effects of excessive vibrations.

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Section: Introductionmentioning

confidence: 99%

Dynamic Behavior Analysis of a High-Rise Traction System with Tensioned Pulley Acting on Compensating Rope

et al. 2020

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“…Increasing depth of mine shaft leads to more insufficient stiffness of guiding ropes, thereby causing the substantial swinging of hoisting conveyances and increasing insecurity. Researchers made many studies about the stiffness [1,2] of guiding ropes and the vibration [3,4] in a rope-guided mine hoisting system. Therefore, the lateral deflection of conveyance and guiding ropes catch more attention in rope-guided hoisting…”

Section: Introductionmentioning

confidence: 99%

Schematic Diagrams Design of Displacement Suppression Mechanism with One Degree-of-Freedom in a Rope-Guided Hoisting System

et al. 2020

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Since it is difficult for lateral stiffness of rope-guided rails to meet industry criteria in deep construction shaft, schematic diagrams of displacement suppression mechanisms (DSMs) are designed with a systematic approach demonstrated to reduce the lateral displacement of rope-guided rails in this paper. DSMs are simplified as planar four-bar and six-bar topological graphs based on topological theory. Each corresponding mechanical chain of these four-bar and six-bar mechanisms is divided into a rack, mechanical parts, prismatic, and revolute joints. An extended adjacency matrix is defined to represent the rack position, specific types of kinematic joints, and adjacency relationships between kinematic parts. Then, a symmetric vertex identification method is proposed with regard to planar 1-DOF (one degree of freedom) four-bar and six-bar topological graphs to get the sequences of prismatic joints for kinematic chains of DSMs. Finally, the alternative schematic diagrams of DSMs are obtained. The results show four-bar mechanisms with simple structure; few kinematical parts but less resident force are suitable for a mine shaft with small space and small swing. Six-bar mechanisms with two prismatic joints and three mechanical rack degree are applicable for wide shaft space in deep shaft, due to their stable structure and double resistant force. This development is helpful for DSM dimension synthesis design in future.

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“…is roundness has the greatest influence on the swing angle and is the fundamental cause of swinging. To transform the equivalent mass and time-varying stiffness of the guiding rope to the end of the lifting rope, Cao [17] established a lateral and torsional vibration model for a rope-guided lift system and analysed the effects of various parameters on the lateral and torsional vibrations of the conveyance. It was determined that appropriate tension and distance differences can decrease the maximum lateral displacement.…”

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

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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.

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Coupled vibrations of rope-guided hoisting system with tension difference between two guiding ropes

Cited by 13 publications

References 38 publications

Dynamic Behavior Analysis of a High-Rise Traction System with Tensioned Pulley Acting on Compensating Rope

Dynamic Behavior Analysis of a High-Rise Traction System with Tensioned Pulley Acting on Compensating Rope

Schematic Diagrams Design of Displacement Suppression Mechanism with One Degree-of-Freedom in a Rope-Guided Hoisting System

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

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