Uncertainty quantification in the dynamics of a guyed mast subjected to wind load

Ballaben, Jorge Sebastian; Sampaio, Rubens; Rosales, Marta B.

doi:10.1016/j.engstruct.2016.11.025

Cited by 16 publications

(4 citation statements)

References 14 publications

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“…The methods for wind load simulation are mainly the harmony superposition method and the linear filter method [44]. The longitudinal fluctuating wind velocity at points on the electrical distribution system is simulated with a ground roughness of class B.…”

Section: Dynamic Structural Analysismentioning

confidence: 99%

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Liu

Wang

et al. 2023

Buildings

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Generally, only wind effect is considered in the collapse evaluation of transmission poles (TPs). However, during a typhoon landing, the rainfall is usually very heavy and the influence of the wind and rainfall should be considered simultaneously. To estimate the bearing capacity of TPs accurately during a typhoon, this paper proposes a method for predicting the water content distribution of soil based on the deep learning method. Then, the earth pressure distribution related to the rainfall is obtained. Furthermore, according to the static balance principle, the ultimate overturning moment of the TPs is obtained, and the corresponding critical wind speed is determined via a numerical simulation. Finally, a case study is tested and the collapse evaluation of TPs under the combined effects of wind and rainfall is obtained. The results show that the critical wind speed when considering rainfall is less than the value when ignoring the rainfall effect. The traditional method overestimates the structural safety of the TPs because the rainfall has a significant reduction on the bearing capacity of TPs.

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Section: Dynamic Structural Analysismentioning

confidence: 99%

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Liu

Wang

et al. 2023

Buildings

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“…The methods for wind load simulation are mainly the harmony superposition method and the linear filter method (Ballaben et al, 2017; Di Paola and Gullo, 2001). Compared to the harmony superposition method, the linear filter method has been widely used to simulate fluctuating wind speeds due to its advantages of less calculations and higher efficiency.…”

Section: Numerical Simulation Of a Long-span Transmission Tower–line mentioning

confidence: 99%

Fragility analysis of a long-span transmission tower–line system under wind loads

Tian

Zhang

2020

Advances in Structural Engineering

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Numerous transmission towers have collapsed due to experiencing strong winds; therefore, the purpose of this article is to investigate the collapse mechanism and the anti-collapse performance of a long-span transmission tower–line system. The detailed finite element model of a typical tower–line system is established in ABAQUS. A global damage index is proposed to quantitatively estimate the overall damage of the structure and define the collapse criteria. An incremental dynamic analysis is performed to obtain the collapse mechanism and the ultimate capacity of the structure. Subsequently, a fragility analysis for evaluating the anti-collapse performance is conducted due to the uncertainty of wind loads. Eventually, the influence of the wind attack angle and the length of the side spans on the fragility is discussed. The results demonstrate that the proposed global damage index is capable of quantitatively reflecting the overall damage and assessing the ultimate capacity of the structure. In addition, the uncertainty of the wind load has a significant influence on the ultimate capacity and the failure position. Furthermore, the results reveal that the wind attack angle and the length of the side spans have an apparent effect on the fragility of the structure.

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“…The modeling and mechanical analysis of the traditional towers, masts in the power transmission system by earlier researchers provided a basis for the modeling of the rod lightning rod [25,26]. Even with this foundation, it is still difficult to perform complete dynamic modeling of large lightning rods.…”

Section: Introductionmentioning

confidence: 99%

Dynamics modeling and experimental modal analysis of bolt loosening for lightning rod

Chen¹,

Chen²,

Chen³

et al. 2020

J. vibroeng.

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Lightning rods are effective to prevent lightning damage in power systems. However, under the influence of severe weather conditions, they often face failure problems, mainly manifested as tilt and fracture caused by bolt loosening which can result in significant economic losses. Therefore, it is very meaningful to detect the loosening of the lightning rod. The vibration-based method is an effective method for bolt loosening detection and is suitable for use on large lightning rods. This paper built a finite element model of the lightning rod Flange-Bolt Structure Unit (FBSU) based on the virtual material method, designed an effective acquisition test of the vibration signal under different loosening conditions of the lightning rod FBSU. The experimental results showed that it was effective to establish the dynamic model of the lightning rod FBSU by using the virtual material method. According to the measured vibration signal, the frequency response function was obtained by TIME MDOF method, and the preliminary judgment of bolt loosening can be realized. This study lays the foundation for the precise positioning and the extent of loosening detection of lightning rod bolt loosening, and also provides a guideline for the vibration test design of large bolted structures similar to lightning rods.

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Uncertainty quantification in the dynamics of a guyed mast subjected to wind load

Cited by 16 publications

References 14 publications

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Fragility analysis of a long-span transmission tower–line system under wind loads

Dynamics modeling and experimental modal analysis of bolt loosening for lightning rod

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