Safe fatigue life of steel towers under the action of wind vibrations

Mikitarenko, M.A.; Perelmuter, Anatoly V.

doi:10.1016/s0167-6105(98)00100-7

Cited by 25 publications

(15 citation statements)

References 1 publication

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“…at the University of Queensland [63,64] and Texas Tech University [65,66] have undertaken extensive physically modelling of downbursts, which included, for the first time, the effect of translation of the downdraft. These investigations have helped to establish the usefulness of the wall jet as a tool in developing our understanding of thunderstorm outflows as they influence building aerodynamics.…”

Section: Downburst Simulationsmentioning

confidence: 99%

“…Table 1 summarizes the main parameters of previous wall jet experiments and physical simulations of downbursts. All wall jet simulations except [64][65][66] employed a stationary jet and examined the behaviour of the jet in a quasi-steady sense, moving the measurement station incrementally away from the jet. Figure 6 shows that this produces a good match of the mean velocity profile when compared with the limited full-scale data [59,[61][62][63][64][65].…”

Section: Downburst Simulationsmentioning

confidence: 99%

“…All wall jet simulations except [64][65][66] employed a stationary jet and examined the behaviour of the jet in a quasi-steady sense, moving the measurement station incrementally away from the jet. Figure 6 shows that this produces a good match of the mean velocity profile when compared with the limited full-scale data [59,[61][62][63][64][65]. However, it cannot reproduce the dynamic characteristics of the flow, in particular the ring vortex and the gust front that are evident in the full-scale observations exemplified by Figure 5.…”

Section: Downburst Simulationsmentioning

confidence: 99%

“…Letchford et.al. [64][65][66] developed the moving jet facility in an effort to overcome this lack of dynamic similarity. In this facility, the wall jet can be traversed over a surface, just as a storm would.…”

Section: Downburst Simulationsmentioning

confidence: 99%

“…Clearly depending on the translational speed of the jet [64,65] a gust front develops. Furthermore, a vortex ring is evident in the instantaneous surface pressure measurements reported in [66].…”

Section: Downburst Simulationsmentioning

confidence: 99%

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Invited Lectures

Sørensen¹,

Hansen²,

Rosas

et al. 2001

Wind Engineers, JAWE

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Section: Downburst Simulationsmentioning

confidence: 99%

Section: Downburst Simulationsmentioning

confidence: 99%

Section: Downburst Simulationsmentioning

confidence: 99%

Section: Downburst Simulationsmentioning

confidence: 99%

Section: Downburst Simulationsmentioning

confidence: 99%

See 3 more Smart Citations

Invited Lectures

Sørensen¹,

Hansen²,

Rosas

et al. 2001

Wind Engineers, JAWE

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Buckling Verification of Manhole Area of Tubular Steel Wind Turbine Towers via Non‐linear Finite Element Analysis

Koulatsou¹,

Chondrogiannis²,

Gantes³

2021

ce papers

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As wind turbine towers grow in height and their blades become longer, actions on the towers are also increased and their safe and cost‐effective design becomes critical for the further development of the wind energy sector. One potential failure mechanism of tubular steel towers is shell local buckling between ring flanges. In the present paper, the buckling behavior of a 120m tall wind turbine tower under realistic wind loads is investigated numerically, focusing on the buckling response near the man‐hole opening. To that effect, nonlinear finite element analyses accounting for geometrical and material nonlinearity and imperfections (GMNIA) is employed. GMNIA is performed taking into account initial geometric imperfections with the most unfavorable shapes resulting from the three primary buckling modes, determining the imperfection size according to EN1993‐1‐6 depending on the assumed fabrication quality class A, B or C. Numerical results are compared to analytical verification according to EN1993‐1‐6. Different wind directions are considered. Moreover, to investigate the influence of the stiffening of the manhole to the tower buckling strength, a comparison between three alternatives of stiffened and an unstiffened manhole is performed.

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A pounding spacer damper and its application on transmission line subjected to fluctuating wind load

et al. 2016

Struct. Control Health Monit.

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In this paper, a new pounding spacer damper (PSD) is proposed, and the control effect on the transmission line under the fluctuating wind load is validated. At first, the schematic of the proposed PSD is provided, and the mechanical models of elastic, damping, and pounding forces are then obtained. After that, the dynamic equations of transmission line equipped with the PSD are derived. On the basis, the finite element model of transmission line-PSD system with the ANSYS software is established, and the pounding force of the PSD is calculated and applied through the ANSYS Parametric Design Language. Then the response induced by the fluctuating wind load is simulated, and meanwhile, the control effects of the PSD and spacer damper without pounding force are compared, of which the results illustrate that the minimal reduction ratio for the conductor span can reach to 11.10%, indicating that the proposed PSD can effectively control the vibration of the conductor span under the fluctuating wind load. In addition, the parametric analysis of gap, frequency, and damping ratios is conducted and demonstrates that the gap and frequency ratio have great impact on the control effect while the influence of damping ratio is not very significant.

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Safe fatigue life of steel towers under the action of wind vibrations

Cited by 25 publications

References 1 publication

Invited Lectures

Invited Lectures

Buckling Verification of Manhole Area of Tubular Steel Wind Turbine Towers via Non‐linear Finite Element Analysis

A pounding spacer damper and its application on transmission line subjected to fluctuating wind load

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