Dynamic response due to cable rupture in a transmission lines guyed towers

Carlos, Thiago Brazeiro; Kaminski, João

doi:10.1016/j.proeng.2017.09.173

Cited by 8 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mass participation ratio indicates the percentage of how much of the structural mass of the model is participating for a given direction and mode [8]. In tower analysis, it is useful to determine the mode shape and natural frequencies which depend on the mass and stiffness distributions as it allows knowing if the frequency of any applied periodic loading will match with a modal response and hence cause resonance, which leads to large oscillations [17]. The value of the damping ratio 0.02 is possible to be used in this study [22,23].…”

Section: Modal Analysismentioning

confidence: 99%

“…Differential sensitivity analysis was implemented and it was found that Young's Modulus, the density of material and cross area of the member are the most important parameters that affecting the dynamic properties of the structure. Dynamic actions are simplified by static analysis and represented by equivalent static loads [17]. Due to the properties of the transmission tower such as lightweight, slender and subject to dynamic nature action, static analysis is insufficient for the design purpose.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Response of Self-Supported Power Transmission Tower Subjected to Wind Action

Hamzah

Usman²,

Yatim

2018

IJET

View full text Add to dashboard Cite

A power transmission tower carries electrical transmission conductor at adequate distance from the ground. It must withstand all nature’s forces besides its self-weight. In structural analysis, natural frequency, mode shape and damping ratio are used to define the structural dynamic properties which relate to the basic structural features. This paper described the dynamic analysis including the modal and the time history analysis on each segment of the self-supported transmission tower to understand its dynamic responses subjected to wind action. The factors such as different height above ground, a different value of wind speed and different wind angle of attack were included in this study to see the influence of those factors towards dynamic response of the structure. The contribution of the wind towards the displacement of the structure is determined in this study by comparing the result obtained in a linear static analysis which considered the load combination without and with the presence of wind action. It was found that displacement using dynamic analysis is bigger than static linear analysis. The result illustrates that the studied factors gave a significant effect on the dynamic response of the structure and the findings indicate that dynamic analysis is vital in structural design.

show abstract

Section: Modal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Self-Supported Power Transmission Tower Subjected to Wind Action

Hamzah

Usman²,

Yatim

2018

IJET

View full text Add to dashboard Cite

show abstract

“…The structural responses of transmission line towers are usually influenced by the action of the wind, foundation degradation, or even due to cable rupture. In [ 6 ], a methodology was developed to investigate the dynamic responses caused by cable rupture, which can generate the phenomenon known as a “cascade effect” and in this case, many towers can collapse at the same time, resulting in significant financial losses. The authors also compared the difference between static end dynamic forces in the tower structure.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Multivariable Modeling Methods for Monitoring the Health of Guyed Towers in Overhead Power Lines

Mendes

Ferreira

Meirelles

et al. 2021

Sensors

View full text Add to dashboard Cite

This article proposes a methodology for monitoring the structural stability of each tower of an electric power transmission line through sensor measurements which estimates the different situations that may indicate the need for intervention to prevent the structure collapsing. The extended Kalman filter was adopted to predict the failures, considering sensor fusion techniques such as the displacements of the upper central position of the tower above certain limits. The load of the stay cables is calculated from the natural frequencies, which are determined by the accelerometers connected to the cables. The average value of these forces, which must be higher than a normal limit, were calculated to predict a failure. All guyed towers of a power transmission line thousands of kilometers long will be individually monitored considering the methodology described in this study, which makes this article one of the first relevant research studies in this area. Typically, guyed towers must often be manually inspected to ensure that the stay cables have acceptable pretension to prevent a lack of stability in the transmission line towers.

show abstract

Discrete mechanical model for nonlinear dynamical analysis of planar guyed towers considering the unilateral contact of cables

Silva,

Silva

2024

International Journal of Non-Linear Mechanics

View full text Add to dashboard Cite

Dynamic response due to cable rupture in a transmission lines guyed towers

Cited by 8 publications

References 1 publication

Dynamic Response of Self-Supported Power Transmission Tower Subjected to Wind Action

Dynamic Response of Self-Supported Power Transmission Tower Subjected to Wind Action

Evaluation of Multivariable Modeling Methods for Monitoring the Health of Guyed Towers in Overhead Power Lines

Discrete mechanical model for nonlinear dynamical analysis of planar guyed towers considering the unilateral contact of cables

Contact Info

Product

Resources

About