Variation of damping and stiffness of lattice towers with load level

Taillon, Jean-Yves; Légeron, Frédéric; Prud׳homme, Simon

doi:10.1016/j.jcsr.2011.10.018

Cited by 19 publications

(13 citation statements)

References 7 publications

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“…Figure 3 shows a typical arrangement of free vibration tests and forced vibration tests. To conduct a free vibration test, an initial force or displacement needs to be applied on the structure to allow the structure to freely vibrate [43]. In contrast, forced vibration tests use a vibration generator to create the resonant phenomenon.…”

Section: Practical Methodsmentioning

confidence: 99%

“…Compared with the complexity of the truss modelling method, the truss-beam method simplifies the modelling process on which current numerical research on behaviours of transmission tower structures are based [24,38,39]. Its accuracy has also been proven by comparing with the results from experimental testing [40][41][42][43].…”

Section: Modelling the Individual Members Of Steel Lattice Transmissimentioning

confidence: 99%

“…A free-vibration experiment on an individual LTT showed a significant variation with different load levels, whereas the relationships between them were not presented clearly [49]. To explain the correlation between damping ratios and applied loading magnitudes, a laboratory free vibration test was proposed on an upper part of a LTT [43]. The applied load ranged from 5% to 100% of its ultimate load capacity and the authors cyclically measured the damping ratios from one peak to another.…”

Section: Previous Research On Dynamic Properties Of Ltts and Line Sysmentioning

confidence: 99%

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Structural Analysis of Lattice Steel Transmission Towers: A Review

Chen¹,

Ou²

2016

J Steel Struct Constr

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Lattice Transmission Towers (LTT) and the associated transmission line systems are important infrastructure in modern society. Due to the complicated load conditions and the nonlinear interaction among the large number of structural components, accurate structural analysis of the LTT systems has been a challenging topic for many years. Still today there are some gaps between research and industrial practice. This paper presents a summary of research outcomes from current literature. Recent developments in structural modelling and failure prediction technology are reviewed in terms of connection joints, individual members and structural systems subjected to static and dynamic loads. The advantages and disadvantages of different approaches have been compared. Finally, the knowledge gaps, associated challenges and possible research directions are highlighted.

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Section: Practical Methodsmentioning

confidence: 99%

Section: Modelling the Individual Members Of Steel Lattice Transmissimentioning

confidence: 99%

Section: Previous Research On Dynamic Properties Of Ltts and Line Sysmentioning

confidence: 99%

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Structural Analysis of Lattice Steel Transmission Towers: A Review

Chen¹,

Ou²

2016

J Steel Struct Constr

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“…Fue definido el valor de 0.05 como razón de amortiguamiento crítico en concordancia con varias referencias (e.g. Taillon et al, 2012;Chopra, 2014;Martín, 2014).…”

Section: Parámetros De Los Métodosunclassified

Análisis dinámico de una torre autosoportada sujeta a cargas de viento y sismo

et al. 2018

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. Análisis dinámico de una torre autosoportada sujeta a cargas de viento y sismo. Obras y Proyectos 23, [78][79][80][81][82][83][84][85][86] Introducción La complejidad de las obras civiles actuales, el desarrollo del conocimiento de las cargas que actúan sobre las estructuras y su variación con el tiempo, hacen cada vez más frecuentes los análisis estructurales asistidos por computadoras. Sin embargo, sigue siendo un proceso

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“…This issue has most influence on dynamic analyses such as in a modal analysis, which is used to determine the natural frequencies of the structure. Modelling with truss elements means that the analytical structure has more dynamic degrees of freedom than in the actual case [21][22][23][24]. Two possible solutions to overcome this problem are to either use dummy members in the model to suppress the unwanted degrees of freedom or to replace the truss elements with beam elements.…”

Section: Lattice Towersmentioning

confidence: 99%

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

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This paper deals with a limit load assessment and preliminary experimental testing of a lattice-type steel tower used to support a newly designed, prototype small wind turbine having nine blades and a rotor diameter of 3.4 m. Small wind turbine and structural engineering codes of standards were followed with the purpose of implementing a system that meets European Union countries' legislation. The supporting lattice tower structure was subjected to a full-scale load test. This test verified that the structure can withstand the design loads. The finite element software ANSYS Mechanical was used to model and analyse the actual structure, and to determine the possible failure modes and their associated load levels. The most probable mode of failure for such a structure was found to be elastic buckling of the main corner posts. A number of finite element lattice tower models utilising different modelling strategies and solution methods are presented and analysed. The paper highlights the importance of using non-linear analyses as opposed to linear analyses and gives recommendations on the most reliable available modelling technique. Computational analyses' results are compared with measurements from a full-scale test on the tower structure.

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Variation of damping and stiffness of lattice towers with load level

Cited by 19 publications

References 7 publications

Structural Analysis of Lattice Steel Transmission Towers: A Review

Structural Analysis of Lattice Steel Transmission Towers: A Review

Análisis dinámico de una torre autosoportada sujeta a cargas de viento y sismo

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

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