Nonlinear dynamic analysis of wire-rope isolator and Stockbridge damper

Barbieri, Nilson; Barbieri, Renato; Silva, Rodrigo Aparecido da; Mannala, Marcos José; Barbieri, Lucas de Sant’Anna Vitor

doi:10.1007/s11071-016-2903-1

Cited by 32 publications

(11 citation statements)

References 28 publications

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“…The general shapes of the peaks up to 5 g are consistent with structural responses encountered in the literature for other systems featuring microslip dry friction damping, such as steel wire ropes [27,28], structures with bolted joints [29, ? ] or turbine blades with underplatform dampers [30].…”

Section: Steady-state Responsesupporting

confidence: 77%

High damping and nonlinear vibration of sandwich beams with entangled cross-linked fibres as core material

Piollet

Fotsing

Ross

et al. 2019

Composites Part B: Engineering

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This article investigates the use of a recently developed fibrous core material to increase vibration damping in sandwich beams. The entangled cross-linked fibre (ECF) material is made of short carbon fibres cross-linked with epoxy resin. Dry friction between fibres provides energy dissipation when the material is deformed. Previous measurements on the material are post-processed to provide a simplified viscoelastic description of the material, for an easier interpretation of subsequent structural testings. Two sandwich beams are compared with reference honeycomb beams: a sandwich beam with an ECF core, and a hybrid beam with a honeycomb core and an ECF insert. Steady-state tests are performed on both types of beams to obtain their frequency responses for different excitation levels, and the corresponding apparent loss factors are computed. The beam with a full ECF core shows an apparent loss factor more than ten times higher than the reference honeycomb beam. The hybrid sandwich beam provides an apparent loss factor four times higher than the reference honeycomb beam. All beams exhibit nonlinear softening responses consistent with a dry friction phenomenon in the material: the resonance frequencies decrease with increasing excitation amplitude, and damping increases then decreases again at very high amplitudes while remaining largely superior to that of the honeycomb beams. Transient impact testings are also presented for a qualitative comparison of the ECF and reference beams, and the ECF beams lead to shorter decay times compared to the reference beams.

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Section: Steady-state Responsesupporting

confidence: 77%

High damping and nonlinear vibration of sandwich beams with entangled cross-linked fibres as core material

Piollet

Fotsing

Ross

et al. 2019

Composites Part B: Engineering

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“…Besides, the Euler-Bernoulli beam was also used to characterize the nonlinear behaviour of the messenger cable (Barbieri and Barbieri, 2012;Langlois and Legeron, 2014;Barry et al, 2015;. Barbieri et al (2019) used a model that consists of a nonlinear cantilever beam with a tip mass to analyse the messenger cables of a Stockbridge. The nonlinear portion of rigidity (caused by curvature) and nonlinear damping (proportional to the nonlinear stiffness matrix) were considered in this model.…”

Section: Dynamic Characteristics Of a Stockbridge Type Vibration Dampermentioning

confidence: 99%

“…To reduce the vibration amplitude to the allowable fatigue limit line, some protective devices have been developed and used in the transmission lines. Among these devices, a Stockbridge type vibration damper, which was invented by Stockbridge (1928), is widely used for its wide range of frequencies Foti and Martinelli, 2018;Barbieri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The approximate calculation of the natural frequencies of a Stockbridge type vibration damper and analysis of natural frequencies' sensitivity to the structural parameters

et al. 2021

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Abstract. Vibration damper is widely used in overhead transmission lines to alleviate aeolian vibration. Its natural frequencies are important parameters for a vibration damper. In this paper, the approximate calculation formulas of natural frequencies of the one-side subsystem of a Stockbridge type vibration damper were derived and the design sensitivity analysis of the natural frequencies was studied using partial differential equations with respect to each concerned parameter including the length of the steel strand, the mass of the counterweight, the eccentric distance, and the radius of gyration of the counterweight. Through a case study that considered a variation of up to ±30 % in the values of the design parameters, the exact calculation and approximate calculation results of the natural frequencies were analysed, and the sensitivity of the vibration damper's natural frequencies to the design parameters was studied. The results show that, within the range of the parameters used in this study, the approximately calculated first-order frequency is lower than the exact values, whereas the approximately calculated second-order frequency is larger than the exact values. The sensitivity analysis indicates that the first-order frequency is highly sensitive to the steel strand's length, whereas it is moderately sensitive to the counterweight's mass and slightly sensitive to the eccentric distance and the gyration radius of the counterweight; the second-order frequency is highly sensitive to the steel strand's length and the gyration radius of the counterweight, moderately sensitive to the counterweight's mass, and slightly sensitive to the eccentric distance. It will provide theoretical guidance and approximate analysis method in engineering for the design of the vibration damper.

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“…The predictions of the numerical model are compared with experimental results obtained by testing a Stockbridge damper prototype mounted on a shaker table, showing an encouraging agreement. Nonlinear models based on finite element beam elements have been adopted by Langlois and Legeron [14] and Barbieri et al [20,21]. In both cases, phenomenological hysteretic models are adopted and the constitutive parameters are identified from the results of static or dynamic experimental tests.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Hysteretic Behaviour of Stockbridge Dampers: Modelling and Parameter Identification

Foti

Martinelli

2018

Mathematical Problems in Engineering

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Stockbridge dampers are widely used to mitigate the vortex-induced vibrations of overhead electrical line conductors and of many other cable or cable-like structures exposed to the action of wind. Aim of this work is to develop a simple, but accurate, mechanical model of a Stockbridge damper to use in the assessment of such structures vibrations. The model is based on a beam-like description of the messenger cable and on a nonlinear formulation of the cross sections cyclic bending behaviour. At the cross-sectional level, the mechanical behaviour of the messenger cable is reproduced with the classic Bouc-Wen hysteretic model, which has been recognized as adequate to represent the local behaviour mainly controlled by interwire sliding processes. The Bouc-Wen model parameters are identified from experimental results available in literature and used at the local (cross-sectional) level to characterize the mechanical behaviour of the messenger cable. The descending global behaviour of the Stockbridge damper compares very favourably with the experimental results in terms of the impedance function at the clamp and allows for the confident use of the proposed model inside the assessing process of full power lines. The important role of the end zones of the messenger cable is highlighted. In these zones, a boundary layer like transition is found to occur for the bending stiffness of the messenger cable cross section. This largely affects the global behaviour of the Stockbridge damper. The length of these zones complements the model parameters.

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Nonlinear dynamic analysis of wire-rope isolator and Stockbridge damper

Cited by 32 publications

References 28 publications

High damping and nonlinear vibration of sandwich beams with entangled cross-linked fibres as core material

High damping and nonlinear vibration of sandwich beams with entangled cross-linked fibres as core material

The approximate calculation of the natural frequencies of a Stockbridge type vibration damper and analysis of natural frequencies' sensitivity to the structural parameters

Hysteretic Behaviour of Stockbridge Dampers: Modelling and Parameter Identification

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