FE-assisted investigation for mechanical behaviour of connections in offshore wind turbine towers

Lu, Cheng; Yang, Fei; Seidel, Marc; Veljković, Milan

doi:10.1016/j.engstruct.2023.116039

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…Weijtjens et al [19] discovered that the FE model is more consistent with the observed load transfer coefficients in the offshore wind farm compared to the values expected from the celebrated Schmidt-Neuper approximation. Cheng et al [20] supplied comprehensive knowledge for the practical implementation of offshore wind turbine connections, and the effectiveness and precision of the FE models were confirmed by comparison with the results of the conducted tests. Belardi et al evaluated the applicability of the composite bolted joint for modeling single-lap multi-column composite bolted joints and compared the stiffness prediction and bolt-load distribution outcomes with those obtained from a refined 3D model [21].…”

Section: Introductionmentioning

confidence: 86%

The Investigation of Various Flange Gaps on Wind Turbine Tower Bolt Fatigue Using Finite-Element Method

Liu,

Geng,

Wang

et al. 2024

Applied Sciences

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Upon careful examination, numerous wind turbine collapses can be attributed to the failure of the tower bolts. Nowadays, the Schmidt–Neuper algorithm is extensively accepted in wind turbine tower bolt design. It is not advisable to utilize the finite-element method, notwithstanding the effect of the flange gap. To quantitatively investigate the influence of flange gaps on bolt fatigue, a nonlinear finite-element model of a flange segment incorporating bolt pretension and contact elements is herein proposed. Three distinct types of flange gaps are defined intentionally. It is possible to determine the nonlinear relationship between the wall load and bolt internal force. The fatigue damage of bolts was thus computed using the obtained nonlinear curve. Comparing with the results with those of Schmidt–Neuper method revealed the bolt fatigue damage is susceptible to a specified flange gap.

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Section: Introductionmentioning

confidence: 86%

The Investigation of Various Flange Gaps on Wind Turbine Tower Bolt Fatigue Using Finite-Element Method

Liu,

Geng,

Wang

et al. 2024

Applied Sciences

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Considerations for the structural design of wind turbine towers: A practical application

de Lima,

Medeiros,

dos Santos

et al. 2024

Structural Design Tall Build

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Aiming to achieve efficient structural performance, this article presents a methodology for the design of the shell structure and dimensioning of the connections of an S355J2 tubular steel tower with a height of 80 m, compatible with a SWT‐2.3‐93 wind turbine. The tower is made up of three segments, interconnected by flanged connections made of high‐strength steel. The analysis considers various load cases, taking into account stress and resistance in different directions, as well as designing connections using Petersen's theory, according to maximum strength and fatigue criteria. The results indicate that the circumferential stresses are nearly negligible compared with the resistant stresses, while the shear stress is significantly higher at the base due to the torsional moment. Meridional stress determines the stability of the structure, requiring consideration of internal pressure for safety. Maximum stress values range from 135.00 to 168.47 MPa, depending on the location along the tower height. Flanged connections meet the strength and fatigue criteria, with the first flange enduring 63.0% of the fatigue effect and the second, 39.7%. Therefore, the results provide reliable information and methodologies for tower design, contributing to the practical and efficient development of these structures.

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A closed-form expression derived from virtual testing for structural optimization of L-flange bolted connections

Cabrera-González,

Blázquez,

París

et al. 2024

Engineering Failure Analysis

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FE-assisted investigation for mechanical behaviour of connections in offshore wind turbine towers

Cited by 8 publications

References 27 publications

The Investigation of Various Flange Gaps on Wind Turbine Tower Bolt Fatigue Using Finite-Element Method

The Investigation of Various Flange Gaps on Wind Turbine Tower Bolt Fatigue Using Finite-Element Method

Considerations for the structural design of wind turbine towers: A practical application

A closed-form expression derived from virtual testing for structural optimization of L-flange bolted connections

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