New Lattice-Tubular Tower for Onshore WEC – Part 1: Structural Optimization

Jovašević, Slobodanka; Mohammadi, Mohammad Reza Shah; Rebelo, Carlos; Pavlović, Marko; Veljković, Milan

doi:10.1016/j.proeng.2017.09.336

Cited by 12 publications

(14 citation statements)

References 8 publications

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“…The case studies considered for this study form part of SHOWTIME research programme [17][18][19][20][21]. As part of this programme, different hybrid towers were studied.…”

Section: Case Studiesmentioning

confidence: 99%

“…As part of this programme, different hybrid towers were studied. In order to ensure structural and economical efficiency, but also feasibility of the manufacturing and erection process, two optimised hybrid towers have been suggested [17][18][19][20][21]. The latter are shown in Figure 2 and will be the focus of research in this study.…”

Section: Case Studiesmentioning

confidence: 99%

“…The tubular part is tapered with 26 mm plate thickness and the diameter ranges from 4500 mm at the base to 3500 mm at the top. In line with [17], a NREL 5 MW wind turbine [47] is assumed for both towers. As shown in Figure 2, one of the two towers is supported by a 6-legged structure and in this case the configuration has been optimised based on the mass and the number of connections of the structure.…”

Section: Case Studiesmentioning

confidence: 99%

“…As shown in Figure 2, one of the two towers is supported by a 6-legged structure and in this case the configuration has been optimised based on the mass and the number of connections of the structure. As described in detail in [17], a parametric optimisation including towers with various bracing configurations and height to base ratios was carried out. An iterative process coupling aeroelastic and finite element simulations was performed, thus enabling the verification of design checks.…”

Section: Case Studiesmentioning

confidence: 99%

“…The project examined structural configurations, successfully adhering to safety and durability design checks, while allowing for economically and environmentally sustainable solutions. Jovašević et al [17,18] performed a structural optimisation, examining a range of bracing systems, a number of connections and various dimensions of columns, thereby resulting in a series of optimised hybrid configurations. For the optimised geometries, an aeroelastic analysis was carried out [19] and the structural performance of the wind turbine towers under normal and extreme operating conditions, ensuring adequate structural robustness, was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Life Cycle Assessment of Tall Onshore Hybrid Steel Wind Turbine Towers

2020

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Increasing needs for taller wind turbines with bigger capacities, intended for places with high wind velocities or at higher altitudes, have led to new technologies in the wind energy industry. A recently introduced structural system for onshore wind turbine towers is the hybrid steel tower. Comprehension of the environmental response of this hybrid steel structural system is warranted. Even though life cycle assessments (LCAs) for conventional wind turbine tubular towers exist, the environmental performance of this new hybrid structure has not been reported. The present paper examines the LCA of 185 m tall hybrid towers. Considerations made for the LCA procedure are meticulously described, including particular attention at the erection and transportation stage. The highest environmental impacts arise during the manufacturing stage followed by the erection stage. The tower is the component with the largest carbon emissions and energy requirements. The obtained LCA footprints of hybrid towers are also compared to the literature data on conventional towers, resulting in similar environmental impacts.

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“…The case studies considered for this study form part of SHOWTIME research programme [17][18][19][20][21]. As part of this programme, different hybrid towers were studied.…”

Section: Case Studiesmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Life Cycle Assessment of Tall Onshore Hybrid Steel Wind Turbine Towers

2020

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Atypical structural systems for mobile communication towers

Golikov

Gubanov

Garanzha

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Alternative steel lattice structures for wind energy converters

Jovašević

Correia

Pavlović

et al. 2019

IJSI

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Purpose In the last decades, the demand and use of renewable energies have been increasing. The increase in renewable energies, particularly wind energy, leads to the development and innovation of powerful wind energy converters as well as increased production requirements. Hence, a higher supporting structure is required to achieve higher wind speed with less turbulence. To date, the onshore wind towers with tubular connections are the most used. The maximum diameter of this type of tower is limited by transportation logistics. The purpose of this paper is to propose an alternative wind turbine lattice structure based on half-pipe steel connections. Design/methodology/approach In this study, a new concept of steel hybrid tower has been proposed. The focus of this work is the development of a lattice structure. Therefore, the geometry of the lattice part of the tower is assessed to decrease the number of joints and bolts. The sections used in the lattice structure are constructed in a polygonal shape. The elements are obtained by cold forming and bolted along the length. The members are connected by gusset plates and preloaded bolts. A numerical investigation of joints is carried out using the finite element (FE) software ABAQUS. Findings Based on the proposed study, the six “legs” solution with K braces under 45° angle and height/spread ratio of 4/1 and 5/1 provides the most suitable balance between the weight of the supporting structure, number of bolts in joints and reaction forces in the foundations, when compared with four “legs” solution. Originality/value In this investigation, the failure modes of elements and joints of an alternative wind turbine lattice structures, as well as the rotation stiffness of the joints, are determined. The FE results show good agreement with the analytical calculation proposed by EC3-1-8 standard.

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New Lattice-Tubular Tower for Onshore WEC – Part 1: Structural Optimization

Cited by 12 publications

References 8 publications

Life Cycle Assessment of Tall Onshore Hybrid Steel Wind Turbine Towers

Life Cycle Assessment of Tall Onshore Hybrid Steel Wind Turbine Towers

Atypical structural systems for mobile communication towers

Alternative steel lattice structures for wind energy converters

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