Stress Concentration Factor Evaluation of Offshore Tubular KT Joints Based on Analytical and Numerical Solutions: Comparative Study

Aidibi, Ali; Babamohammadi, Sajjad; Fatnuzzi, Nicholas; Correia, José A.F.O.; Manuel, Lance

doi:10.1061/(asce)sc.1943-5576.0000622

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…Aidibi et al [38] presented a comparative study between Efthymiou's analytical formulations and numerical solutions by finite element analysis (FEA), considering the hot-spot stress approach recommended by IIW, to evaluate the stress concentration factor (SCF) of offshore tubular KT joints. In this research work, the authors concluded that the SCFs estimated by FEA at the crown points of the main chord have shown very high values when compared with DNVGL (Efthymiou's relations).…”

Section: List Of Notationmentioning

confidence: 99%

Numerical analysis and discussion on the hot-spot stress concept applied to welded tubular KT joints

Ávila

Correia

Carvalho

et al. 2022

Engineering Failure Analysis

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Section: List Of Notationmentioning

confidence: 99%

Numerical analysis and discussion on the hot-spot stress concept applied to welded tubular KT joints

Ávila

Correia

Carvalho

et al. 2022

Engineering Failure Analysis

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“…Based on elastic and plastic analyses of monopile foundation, Campione [4] proposed a simplified approach to calculate the soil-structure interaction (SSI) of offshore wind tower founded on a monopile member. Aidibi et al [5] investigated the stress concentration of the joints by using analytical calculations and numerical solutions. The results show that the stress concentration factors from the standards are more conservative than those from the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Optimization for Offshore Prestressed Concrete–Steel Hybrid Wind Turbine Support Structure with Pile Foundation Using a Parallel Modified Particle Swarm Algorithm

Li,

Xu,

Yuan

2024

JMSE

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The prestressed concrete–steel hybrid (PCSH) support structure, which replaces the lower part of the traditional support with a concrete segment, is a prospective support structure solution for ultrahigh wind turbines. Taking a 5.5 MW wind turbine support structure founded on a jacket substructure with pile foundation as an example, an optimized design of the corresponding PCSH support structure with pile foundation for offshore wind turbine is conducted considering the soil–structure interaction (SSI) and the effect of water pressure. The construction cost of the proposed structure is treated as the objective function and minimized with a parallel modified particle swarm optimization (PMPSO) algorithm where the physical dimensions of each part of the PCSH wind turbine support structure are treated as optimization variables. Eleven optimization constraints are considered under both the serviceability limit state (SLS) and the ultimate limit state (ULS) according to relevant specifications and industry standards. A penalty function strategy is introduced to make sure that these constraints are fulfilled. The mechanical behavior and the cost of the optimal PCSH support structure with pile foundation are analyzed and are compared with those of the original design with a traditional steel tube tower founded on a jacket substructure. The results show that the cost and levelized cost of energy (LCOE), a comprehensive evaluation, of the optimized PCSH support decrease obviously with the PMPSO algorithm, which can provide advanced mechanic behavior including natural frequency, top deformation, and anti-overturning capacity. Compared with the PSO algorithm, the PMPSO algorithm has better performance in the procedure of PCSH support for offshore wind turbine optimization.

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Microstructure and Hardness Properties of a S690QL Steel Welded Joint

Mendes,

Monteiro,

Silva

et al. 2024

Procedia Structural Integrity

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Stress Concentration Factor Evaluation of Offshore Tubular KT Joints Based on Analytical and Numerical Solutions: Comparative Study

Cited by 4 publications

References 24 publications

Numerical analysis and discussion on the hot-spot stress concept applied to welded tubular KT joints

Numerical analysis and discussion on the hot-spot stress concept applied to welded tubular KT joints

Optimization for Offshore Prestressed Concrete–Steel Hybrid Wind Turbine Support Structure with Pile Foundation Using a Parallel Modified Particle Swarm Algorithm

Microstructure and Hardness Properties of a S690QL Steel Welded Joint

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