Galloping of Bundle Conductor

Zhang, Q.; Popplewell, N.; Shah, A. H.

doi:10.1006/jsvi.1999.2858

Cited by 94 publications

(49 citation statements)

References 16 publications

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“…Zhang el al. [15] established a computationally efficient hybrid model, in which the mode shapes were determined by the finite element method and the initial condition, and analytically investigated the steady vibration amplitudes of the system. Keutgen and Lilien [16] conducted a wind tunnel test to obtain a full set of data of recent galloping results, which were validated by the corresponding numerical simulation.…”

Section: Shock and Vibrationmentioning

confidence: 99%

See 1 more Smart Citation

Study on Galloping Oscillation of Iced Catenary System under Cross Winds

Guo

Yang

2017

Shock and Vibration

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This paper mainly aims at revealing the nature of the galloping oscillation of iced catenary system under cross winds. The aerodynamic force on the iced catenary system is assumed to be quasi-steady, and then the quasi-steady aerodynamic lift and drag coefficients are completed in FLUENT. By fitting the discrete simulation data, the expression of the vertical aerodynamic force is further obtained. According to the Den Hartog vertical galloping mechanism, the stability of iced catenary is discussed and the initial icing angle corresponding to the critical stability is obtained. On this basis, the dynamic model of the simple iced catenary system under cross winds is established. The partial differential vibration equation of the system is converted into the ordinary differential equation by the Galerkin method and then numerically solved. The condition of the unstable catenary motion in simulation is in agreement with that from theoretical stability analysis. In addition, the effects of structural damping, initial icing angle, and wind velocity on the system responses are investigated.

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Section: Shock and Vibrationmentioning

confidence: 99%

“…Due to the reason that the structural damping coefficients are positive, the necessary condition for the occurrence of galloping motion of iced contact wire can be derived from (15) and (30).…”

Section: Stability Analysis Of Catenary System As Illustrated Inmentioning

confidence: 99%

Study on Galloping Oscillation of Iced Catenary System under Cross Winds

Guo

Yang

2017

Shock and Vibration

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“…Rawlins [10] 2 Mathematical Problems in Engineering and Chabart and Lilien [11] measured the aerodynamic characteristics of single conductors in wind tunnel test. However, the study by Zhang et al [12] showed that that galloping takes place more frequently on a bundle conductor transmission line than on a single one because the cross-sectional shape of the ice accreted on a bundle conductor tends to be noncircular due to its larger torsional stiffness. Zhou et al [13] carried out a wind tunnel test to obtain the aerodynamic coefficients of the iced eight bundle conductor with crescent shape.…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Tests on Aerodynamic Characteristics of Ice‐Coated 4‐Bundled Conductors

Nie

Zhu

et al. 2017

Mathematical Problems in Engineering

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Wind tunnel tests were carried out to obtain the static aerodynamic characteristics of crescent iced 4-bundled conductors with different ice thicknesses, initial ice accretion angles, bundle spaces, and wind attack angles. The test models were made of the actual conductors and have a real rough surface. Test results show that the influence of wake interference on the drag coefficients of leeward subconductors is obvious. The interference angle range is larger than 20 ∘ and the drag coefficient curves of leeward subconductors have a sudden decrease phenomenon at some certain wind attack angles. The absolute value of the lift and moment coefficient increases with the increase of the ice thickness. In addition, the galloping of the iced subconductor may occur at the angle of wind attack near ±20 ∘ and the wake increases the moment coefficient. The variation of initial ice accretion angle has a significant influence on the aerodynamic coefficients. The aerodynamic coefficient curves exhibit a "moving" phenomenon at different initial ice accretion angles. The bundle spaces have a great influence on the moment coefficient of leeward thin ice-coated conductors. With the increase of ice thickness, the bundle spaces generally have little influence on the aerodynamic coefficients.

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“…However, elastically fixed plate inadequately describes overhead transmission lines behavior. Among the recent work considered determination of overhead transmission lines critical wind speed galloping conductors can be emphasized the paper [3,[6][7][8]. In this work considered a single wire.…”

Section: Review Of Previous Researches Research Backgroundmentioning

confidence: 99%

“…In these works, basically, considered theoretical problems of galloping, which consist of making general mathematical model, which under given conditions allows to determine main characteristics of oscillatory process -galloping intensity. Besides, in papers [2,6,8,[16][17][18] high attention is paid to methods of galloping control. However, issues connected with iced-up wires stability loss in wind flow are not considered.…”

Section: Review Of Previous Researches Research Backgroundmentioning

confidence: 99%