Assessment of safety for axial fluctuations of head sheaves in mine hoist based on coupled dynamic model

Yao, Jiannan; Xiao, Xingming; Peng, Anhua; Jiang, Yuqiang; Ma, Chenguang

doi:10.1016/j.engfailanal.2015.02.011

Cited by 37 publications

(29 citation statements)

References 12 publications

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“…e higher level represents the higher excitation frequency. When the excitation frequency increases, the "beat frequency" characteristic of the tension signal becomes increasingly prominent [30,31]. e beat frequency is similar to the signal "modulation" induced by two approaching signal frequencies.…”

Section: Excitationmentioning

confidence: 96%

Experimental Study on the Nonlinear Dynamic Characteristics of Wire Rope under Periodic Excitation in a Friction Hoist

Guo

Zhang

et al. 2020

Shock and Vibration

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e nonlinear dynamic responses of a wire rope under periodic excitation in a friction hoisting system are investigated.Longitudinal excitation experiments of different periodic excitation frequencies are performed. e nonlinear dynamic characteristics of the rope, including transverse, longitudinal, and coupled vibrations, are discussed with time-frequency analysis. e results show that the transverse vibration is a forced vibration following the excitation, while the longitudinal vibration shows a complex, random vibration state. e vibration amplitude and intensity deviate significantly from their linear trend (superharmonic resonance) at some excitation frequencies, and this deviation indicates the typical nonlinear multiorder natural frequency characteristics. e lifting motion can lead to additional corrugated high-order harmonics and cause a fundamental wave distortion of low-frequency excitation. Experimental evidence for the coupling characteristics of the transverse-longitudinal rope vibration in the lifting process is found.

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Section: Excitationmentioning

confidence: 96%

Experimental Study on the Nonlinear Dynamic Characteristics of Wire Rope under Periodic Excitation in a Friction Hoist

Guo

Zhang

et al. 2020

Shock and Vibration

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“…12 acceleration is not obvious, but instead is the reverse peak with increasing amplitude. When the rope runs out of the friction pulley, i.e., the string rope, the Z and Y direction rope vibrations present typical "beat-frequencies" [4,5]. This is due to the motion of the string being stable and its tension fluctuating steadily in the constant speed stage (Figure 11).…”

Section: Rope Dynamics In the Wrapping Processmentioning

confidence: 99%

“…With the development of modern large-scale friction hoisting, the problems of dynamic characteristics, which are not obvious in low-speed and light-load conditions, are gradually reflected, for example, in rope vibration and slippage [1,2]. During dynamic operations, especially in severe conditions such as acceleration and emergency braking, the long-distance suspended rope will produce large elastic vibrations and tension impacts under the influence of the terminal heavy container [3][4][5]. The vibration impact produces not only longitudinal tension, but also horizontal and torsional vibration due to the transmission of the shock wave [6,7].…”

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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“…Axial Wobbles of the Head Sheave. e axial wobble frequency of the head sheave is mainly the first three orders of periodic rotation frequencies [19]. In this paper, the first three orders of axial wobbles of the head sheave are used as the excitations for the lateral vibration of the hoisting rope.…”

Section: Mathematical Model Of the Windingmentioning

confidence: 99%

“…e vibration characteristics and control of the winding cable through crossover areas in the coal mine hoister are studied through the geometric method [18]. e lateral vibration characteristics of the catenary rope in the multirope friction hoisting system are researched and verified by experiment [19]. e dynamic characteristics of the mine hoisting ropes with variable length and roller guides with the diameter inconformity of drums are given by the Vd-FEM and Lagrange's equations.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamic Behavior of Winding Hoisting Rope under Head Sheave Axial Wobbles

Wang

Xiao

et al. 2019

Shock and Vibration

Self Cite

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Axial wobbles of the head sheave due to manufacturing accuracy and installation technology can exert periodic lateral excitations to the winding hoisting rope. A hoisting rope consists of a constant catenary rope from the drum to the head sheave and a variable vertical rope from the head sheave to the conveyance. e longitudinal and lateral vibration responses of the hoisting rope are coupled to each other. In this paper, the coupled lateral-longitudinal governing equations of the winding hoisting system under the axial wobble excitations of the head sheave are established by the Hamilton principle. e governing equations are nonlinear infinite-dimensional partial differential equations, which are discretized into the finite-dimensional ordinary differential equations through the Galerkin method. e dynamic responses of the hoisting rope under the head sheave axial wobbles are given by MATLAB simulation when the winding hoist is lifting or lowering. e results show that lateral vibration displacements of the vertical rope under the head sheave axial wobbles are larger than those of the catenary rope. e axial wobble amplitude range of the head sheave is given to limit the lateral vibration displacements of the hoisting rope.

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Assessment of safety for axial fluctuations of head sheaves in mine hoist based on coupled dynamic model

Cited by 37 publications

References 12 publications

Experimental Study on the Nonlinear Dynamic Characteristics of Wire Rope under Periodic Excitation in a Friction Hoist

Experimental Study on the Nonlinear Dynamic Characteristics of Wire Rope under Periodic Excitation in a Friction Hoist

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

Nonlinear Dynamic Behavior of Winding Hoisting Rope under Head Sheave Axial Wobbles

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