Fundamental concepts in the analysis of wake-induced oscillation of bundled conductors

Rawlins, C.B.

doi:10.1109/t-pas.1976.32233

Cited by 16 publications

(9 citation statements)

References 6 publications

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“…Different forms of fluid forces acting on cylinders have been proposed (Hardy and Cloutier 1973;Rawlins 1976;Simpson and Flower 1977;Tsui and Tsui 1979). A summary of these models is given in Table 9.3.…”

Section: Wake-induced Fluttermentioning

confidence: 99%

Flow-Induced Vibration of Circular Cylindrical Structures

Chen

1985

159

203

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A major purpose of the Technical Information Center is to provide the broadest dissemination possible of information contained in DOE's Research and Development Reports to business, industry, the academic community, and federal, state and local governments.Although a small portion of this report is not reproducible, it is being made available to expedite the availability of information on the research discussed herein. ANL-85-51 ------------------------------ 11-6References--Sec. Current DOE funding for this work is from the Office of Reactor Systems, Development and Technology within the Office of Nuclear Energy.A significant amount of material presented in this report is taken from the results of various program activities sponsored by AEC, ERDA, and DOE at ANL.The author is indebted to those who supported the program at ANL throughout the years, in particular, Messrs. Nicholas Grossman and Chet Bigelow for their interest and recognition of this important and challenging subject.The author is grateful for the support received from his colleagues of the Vibration Analysis Section of the Components Technology Division of ANL, which provides the resources necessary to perform this work.The Section Manager, Dr. M. W. Wambsganss, with his unfaltering faith in me, gave me encouragement and confidence to complete this report.Grateful appreciation is expressed to Miss Joyce Stephens for her superb typing and word-processing and to Mrs. S. K. Zussman for her expert editing of the manuscript. 28 CREDITSThe author and Argonne National Laboratory gratefully acknowledge the courtesy of the organizations aLid individuals who granted permission to use illustrations and. other information in this report.The sources of this information are listed below. Figs. 6.3, 6.4 This report summarizes the flow-induced vibration of circular cylinders in quiescent fluid, axial flow, and crossf low, and applications of the analytical methods and experimental data in design evaluation of various system components consisting of circular cylinders.

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Section: Wake-induced Fluttermentioning

confidence: 99%

Flow-Induced Vibration of Circular Cylindrical Structures

Chen

1985

159

203

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“…When the leeward sub-conductor is out of the zone, the air flow around it is similar to a single cylinder in the flow so that there is only drag on it. It is indicated that the wake influence region of the windward sub-conductor on the leeward one is about 50 times the sub-conductor diameter D in the flow direction [ 22 ] and in the range of ±5 D in the vertical direction [ 8 , 20 , 23 ] as shown in figure 6 . In the numerical model, the distances, Y and Z , between the two sub-conductors in horizontal and vertical directions are respectively in the range of 4 D to 50 D and −5 D to 5 D .…”

Section: Aerodynamic Characteristics Of Twin Bundle Conductorsmentioning

confidence: 99%

Wake-induced oscillation behaviour of twin bundle conductor transmission lines

Wu¹,

Yan

Huang

et al. 2018

R. Soc. open sci.

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A numerical method to simulate air flow around a bundle conductor line by means of the FLUENT software is presented and verified by a wind tunnel test for aerodynamic characteristics of a twin bundle conductor line. The lift and drag coefficients of the leeward sub-conductor of a twin bundle conductor varying with its relative position in the wake zone to the windward one under different wind velocities are numerically determined by the presented method. A user-defined subroutine of ABAQUS software is developed to apply the aerodynamic loads on each sub-conductor and the electromagnetic force between sub-conductors. The numerical simulation method for wake-induced oscillation of a bundle conductor line is proposed. By means of the numerical method, wake-induced oscillation processes of twin bundle conductor transmission lines under different parameters, including current intensity, spacer layout, span length and wind velocity, are numerically simulated. Moreover, the effects of those parameters on the oscillation characteristics of the lines, such as vibration mode, frequency, amplitude and motion trace, are discussed. The results obtained provide a fundamental basis for the understanding of wake-induced oscillation behaviour of twin bundle conductor transmission lines and the development of control technique for wake-induced oscillation.

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“…Many scholars have conducted a lot of research [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] on galloping of the iced bundle conductors transmission lines. On the basis of ignoring the difference of aerodynamic characteristics for all subconductors, Zhang et al [5] simplified the bundle conductor as a single conductor to analyze the galloping characteristics.…”

Section: Introductionmentioning

confidence: 99%

Study on Galloping Oscillation of Iced Twin Bundle Conductors considering the Effects of Variation of Aerodynamic and Electromagnetic Forces

Wu¹,

Ye²,

Zhang³

et al. 2020

Shock and Vibration

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Due to the occurrence of whole-span and subspan vibration at the same time during the galloping of the iced bundle conductors, the distance between the subconductors changes, resulting in the variation of the aerodynamic parameters for the leeward subconductors. The existing conventional studies usually only consider the whole-span galloping, ignoring the relative motion and the electromagnetic force between the subconductors. Based on considering the above two factors at the same time, a new numerical simulation method to study the galloping behaviors of the iced conductors is presented. Then, the galloping behaviors of the iced twin bundle conductors’ transmission line with different current intensity, initial wind attack angle, and spacer layout are studied. The galloping oscillation behaviors include time histories of vibration displacements, mode, amplitude, frequency, motion traces, and the distance between two subconductors. The simulation results showed that the whole-span and subspan vibration appear at the same time during galloping oscillation and two subconductors may collide with each other when affected by the varying electromagnetic and aerodynamic forces. The effects of varying electromagnetic and aerodynamic forces on galloping behavior cannot be ignored. The new method presented in this work can contribute to the galloping study of the iced bundle conductors.

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Fundamental concepts in the analysis of wake-induced oscillation of bundled conductors

Cited by 16 publications

References 6 publications

Flow-Induced Vibration of Circular Cylindrical Structures

Flow-Induced Vibration of Circular Cylindrical Structures

Wake-induced oscillation behaviour of twin bundle conductor transmission lines

Study on Galloping Oscillation of Iced Twin Bundle Conductors considering the Effects of Variation of Aerodynamic and Electromagnetic Forces

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