Periodic and quasiperiodic galloping of a wind-excited tower under external excitation

Belhaq, Mohamed; Kirrou, Ilham; Mokni, Lahcen

doi:10.1007/s11071-013-1010-9

Cited by 22 publications

(30 citation statements)

References 21 publications

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“…In this paper, we extend the results given in [10,12] by focusing on the combined effect of external FHE and fast IPD on periodic galloping. The main purpose is to examine how FHE and IPD can influence the galloping of the wind-excited tower when both expiations are introduced simultaneously.…”

Section: Introductionmentioning

confidence: 69%

“…Note that the case without FHE has been studiend in [10], the case without IPD was considered in [12], while the case without FHE and IPD (Y = 0) was talked in [8].…”

Section: Equations Of Motion and Slow Dynamicmentioning

confidence: 99%

“…Recently, the effect of fast harmonic excitation (FHE) on periodic and quasiperiodic galloping onset of a tower exposed to steady and unsteady wind was studied near primary resonance [10]. The introduction of a FHE as a control strategy was motivated by an experimental work made for vibrating testing purpose of a full size tower [11].…”

Section: Introductionmentioning

confidence: 99%

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Galloping of wind-excited tower under external excitation and parametric damping

Mokni

Kirrou

Belhaq

2014

MATEC Web of Conferences

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This paper investigates the influence of combined fast external excitation and fast parametric damping on the amplitude and the onset of galloping of a tower submitted to steady and unsteady wind flow. A lumped single degree of freedom model is considered and the cases where the turbulent wind activates either external ex-citation, parametric one or both are studied. The methods of direct partition of motion and the multiple scales are used to drive a slow dynamic near primary resonance. The influence of the combined excitations on the galloping is examined showing the beneficial effect on the amplitude and the onset of galloping when the excitations are introduced together.

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Section: Introductionmentioning

confidence: 69%

“…Note that the case without FHE has been studiend in [10], the case without IPD was considered in [12], while the case without FHE and IPD (Y = 0) was talked in [8].…”

Section: Equations Of Motion and Slow Dynamicmentioning

confidence: 99%

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Galloping of wind-excited tower under external excitation and parametric damping

Mokni

Kirrou

Belhaq

2014

MATEC Web of Conferences

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“…According to the oned.f. model of a tower, the unsteady wind flow is responsible for the quasi-periodic galloping (Luongo and Zulli, 2011;Kirrou et al, 2013;Belhaq et al, 2013). However, it seems that the galloping mechanism of the iced transmission lines may be more complicated, reflected by the three-dimensional model.…”

Section: Galloping Of Iced Quad Bundlementioning

confidence: 99%

Investigation into galloping characteristics of iced quad bundle conductors

Yan

Liu

et al. 2014

Journal of Vibration and Control

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A nonlinear finite element method for galloping of iced bundle conductor transmission lines is presented. Wind tunnel tests for galloping of quad bundle conductor segments with crescent-shaped and sector-shaped ice models were carried out, and validity of the finite element method is demonstrated by the consistency of the galloping responses determined by the numerical method and those measured by the wind tunnel tests. Numerical models of four sections of iced transmission lines with different Irvine parameter l 2 , which determines if internal resonance exists, are set up. Galloping of the iced transmission lines in steady wind flow and stochastic wind field is numerically simulated by the presented finite element method. Based on the numerical results, galloping characteristics of the iced transmission lines with and without internal resonance in steady and stochastic wind fields are discussed. It is found that the galloping mode and frequency of an iced quad bundle conductor transmission line in a stochastic wind field are similar to those in a steady wind flow, but the galloping amplitude may be different. Moreover, the Irvine parameter l 2 may be used to estimate some galloping characteristics, such as galloping mode and coupling movement induced by internal resonance.

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“…The effect of wind velocity on the quasiperiodic galloping of a self-excited tower under turbulent wind was studied by Kirrou, Mokni and Belhaq [13], where they performed perturbation analysis in order to obtain analytical expressions of the quasiperiodic solution and, as an extension to previous studies; Belhaq, Kirrou and Mokni [14] focused principally on the effect of external harmonic excitation on the onset of periodic and quasiperiodic galloping of a wind excited tower. More recently, the influence of fast, harmonic internal parametric damping on the periodic and quasiperiodic galloping of a wind excited tower using perturbation analysis was examined by Mokni, Kirrou and Belhaq [15].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a Parametrically Excited System with Two Forcing Terms

Sofroniou

Bishop

2014

Mathematics

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Motivated by the dynamics of a trimaran, an investigation of the dynamic behaviour of a double forcing parametrically excited system is carried out. Initially, we provide an outline of the stability regions, both numerically and analytically, for the undamped linear, extended version of the Mathieu equation. This paper then examines the anticipated form of response of our proposed nonlinear damped double forcing system, where periodic and quasiperiodic routes to chaos are graphically demonstrated and compared with the case of the single vertically-driven pendulum.

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Periodic and quasiperiodic galloping of a wind-excited tower under external excitation

Cited by 22 publications

References 21 publications

Galloping of wind-excited tower under external excitation and parametric damping

Galloping of wind-excited tower under external excitation and parametric damping

Investigation into galloping characteristics of iced quad bundle conductors

Dynamics of a Parametrically Excited System with Two Forcing Terms

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