Parameter Analysis on Wind-Induced Vibration of UHV Cross-Rope Suspension Tower-Line

Xilai, Li; Yu, Dengke; Li, Zhengliang

doi:10.1155/2017/8756019

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…With the rapid development of power grid, the galloping characteristics of iced transmission lines have attracted the attention of most scholars [1][2][3][4][5]. In fact, the span length of transmission lines is far larger than its diameter, which belongs to the flexible cable structure.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Influences of Two Discrete Methods on Galloping Characteristics of Iced Quad Bundle Conductors

Liu

Min

Wu³

et al. 2020

Advances in Civil Engineering

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The partial differential galloping equation of iced quad conductors can be transformed into an ordinary differential galloping equation by two discrete methods: one is a direct discrete method and the other is an indirect discrete method. The two discrete methods are reasonable and effective and have their own advantages and disadvantages, but whether the two different discrete methods would cause the differences in galloping characteristics of the iced quad conductor has not been studied. Based on this concept, this paper studies this problem systematically. Firstly, based on the variational principle for Hamiltonian, the partial differential galloping equation with 3DOFs of the iced quad bundle conductor is derived and then two discrete methods are used to transform the partial differential galloping equation into an ordinary differential galloping equation. One is to use a direct method to transform partial differential galloping equation into an ordinary differential galloping equation, while the other is to use an indirect method to transform partial differential galloping equation into an ordinary differential galloping equation. Secondly, based on the wind tunnel test, the three-component aerodynamic coefficients of each subconductor of the iced quad conductor are obtained, and the equivalent aerodynamic coefficients at the central axis of the quad bundle conductor are obtained by using a reasonable method. Then, the aerodynamic coefficients are fitted by Taylor rules and the aerodynamic coefficients of wind angle of attack which is 55° are used in the analysis of galloping characteristics of the iced quad conductor. Finally, based on the numerical method, the displacement response of the two discrete methods is obtained. By comparing the differences of the displacement response obtained by the two discrete methods, it is found that the two discrete methods have certain influences on the phase, frequency, and amplitude of the iced quad bundle conductor. By comparing the calculation process of these two discrete methods, it can be obtained that the calculation process of the direct discrete method is more complex and the calculation process of the indirect discrete method is simpler. By comparing the calculation results of these two discrete methods, the amplitude obtained by the indirect discrete method is bigger than that obtained by the direct discrete method, especially the amplitude in the torsional direction. The research conclusion of this paper can offer some guidance to civil and electric engineering.

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Section: Introductionmentioning

confidence: 99%

Investigation on Influences of Two Discrete Methods on Galloping Characteristics of Iced Quad Bundle Conductors

Liu

Min

Wu³

et al. 2020

Advances in Civil Engineering

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“…As the main design load for high and flexibility buildings, wind load has attracted lots of attention from experts [1]. Wind load research is a hot topic currently, containing wind field measurement [2], theoretical research [3,4], numerical simulation [5], and forecasting [6]. Concerning the field application and operation in wind engineering and structural health monitoring system, data loss is inevitable due to faulty sensors and the instability of power supply and data transmission in wireless sensing system [7].…”

Section: Introductionmentioning

confidence: 99%

Simplified‐Boost Reinforced Model‐Based Complex Wind Signal Forecasting

Lin

Wu³

2020

Advances in Civil Engineering

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Wind signal forecasting has become more and more crucial in the structural health monitoring system and wind engineering recently. It is a challenging subject owing to the complicated volatility of wind signals. The robustness and generalization of a predictor are significant as well as of high precision. In this paper, an adaptive residual convolutional neural network (CNN) is developed, aiming at achieving not only high precision but also high adaptivity for various wind signals with varying complexity. Afterwards, reinforced forecasting is adopted to enhance the robustness of the preliminary forecasting. The preliminary forecast results by adaptive residual CNN are integrated with historical observed signals as the new input to reconstruct a new forecasting mapping. Meanwhile, simplified-boost strategy is applied for more generalized results. The results of multistep forecasting for five kinds of nonstationary non-Gaussian wind signals prove the more excellent adaptivity and robustness of the developed two-stage model compared with single models.

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Numerical Simulation of the Radar Cross Section of UHV/EHV Power Lines Illuminated by X-, C-, L-, and P-Band Spaceborne SAR

Shi

Wang

et al. 2023

IEEE Trans. Geosci. Remote Sensing

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Parameter Analysis on Wind-Induced Vibration of UHV Cross-Rope Suspension Tower-Line

Cited by 4 publications

References 17 publications

Investigation on Influences of Two Discrete Methods on Galloping Characteristics of Iced Quad Bundle Conductors

Investigation on Influences of Two Discrete Methods on Galloping Characteristics of Iced Quad Bundle Conductors

Simplified‐Boost Reinforced Model‐Based Complex Wind Signal Forecasting

Numerical Simulation of the Radar Cross Section of UHV/EHV Power Lines Illuminated by X-, C-, L-, and P-Band Spaceborne SAR

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