Results 201 to 210 of about 3,564 (235)

Nonlinear Numerical Simulation of Iced Conductor Galloping

Applied Mechanics and Materials, 2010
A two-node cable element which the axial torsion and geometrical nonlinear were considered was developed based on the update Lagrange formulation, and a model of multi-span transmission line for galloping analysis was established. A nonlinear numerical simulation of single iced conductor galloping was proposed.
Li Li, Zi Dong Hu, Zhi Yuan Cheng, Wei Jiang   +3 more
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Isogeometric Collocation Method for the Galloping of an Iced Conductor

Journal of Engineering Mechanics, 2017
AbstractA computationally efficient isogeometric collocation (IGA-C) method based on nonuniform rational B-splines (NURBS) is adopted to analyze the large amplitude, low frequency, and self-excited...
Dongliang Zhang, Zeng He, Zheng Huang, Wen Jiang   +3 more
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Parameter Study on Galloping of Iced Bundled Conductors

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
The aerodynamic coefficients of iced quad-bundled conductor varying with attack angle determined by wind tunnel test are presented. A cable element with torsional degree-of-degree used to simulate the iced conductor is obtained in ABAQUS software by releasing the two bending degrees-of-freedom and setting the material to be incompressible.
Jing Hu, Bo Yan, Song Zhou, Hongyan Zhang, Hao Li, Changsheng Miao   +5 more
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Influence of turbulence on the galloping instability of iced conductors

IEEE Transactions on Power Apparatus and Systems, 1975
Previously reported wind tunnel dynamic tests on spring-supported models of transmission line conductors with crescent-shaped accumulations of ice, showed that the galloping instability of these models was significantly affected by turbulence in the air flow.
J. Chadha, W. Jaster
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Galloping of bundled power line conductors

Journal of Sound and Vibration, 1980
Abstract This paper describes an experimental and analytical study of the galloping of a two-dimensional section model of a two-conductor bundle in which ice-accreted conductors are replaced by two identical square prisms, with both vertical and torsional movements allowed but the horizontal one blocked, in a uniform wind tunnel flow.
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Some Effects of Conductor Twisting on Galloping

IEEE Transactions on Power Apparatus and Systems, 1980
This paper considers some simplified and approximate approaches to the effects of torsional rotation or twist on the dynamic instability of conductors. The conductor is considered in the classical sense as a beam rod having uniform torsion stiffness all along its length, and a uniform aerodynamic profile shape initially resulting from an accumulation ...
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Conductor Galloping-Part II Torsional Mechanism

IEEE Transactions on Power Apparatus and Systems, 1981
A detailed aerodynamic wind tunnel study on conductors with natural ice shapes shows that, over a practical range of ice conditions and wind speeds, conductor galloping on overhead lines is caused largely by the self-excited torsional mechanism.
O. Nigol, P. Buchan
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Theoretical and Numerical Analysis of Galloping of Bundle Conductors

2011 Asia-Pacific Power and Energy Engineering Conference, 2011
A 2 DOF model with the coupling of vertical and torsional motions is considered to study galloping of bundle conductors in this paper. By using the averaging method and the Routh-Hurwitz criteria, the motion equations are solved to discuss the stability of the trivial solution and find the influence of system parameters such as ice thickness, initial ...
Huabiao Zhang, Xinye Li, Lijuan Zhang, Lijuan He   +3 more
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Galloping Conductors

2009
The chapter describes galloping of overhead conductors. It includes an overview on the phenomenon, with information on its characteristics, types of galloping, damage resulting from it, and causes. The chapter also covers the mechanisms of galloping and reviews protection methods.
Lilien, Jean-Louis, Havard, Dave, Van Dyke, Pierre   +2 more
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Galloping Characteristics of Conductor Accreted with Crescent-Shaped Ice

Applied Mechanics and Materials, 2012
Accounting for the disastrous phenomena of ice-accreted conductor galloping, wind tunnel tests of LGJ630/45 conductor accreted with crescent-shaped ice are conducted. Based on the test results, conductor galloping is simulated by employing the PCL language of ANSYS commercial software package and then the influences of span lengths as well as free ...
Hui Xue Dang, Feng Li Yang, Xin Min Li, Jing Bo Yang   +3 more
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