open access publication

Article, 2024

A reliability-constrained optimisation framework for offshore wind turbine support structures

International Journal of Sustainable Energy, ISSN 1478-6451, 1478-646X, Volume 43, 1, Page 2352786, 10.1080/14786451.2024.2352786

Contributors

Rezvanipour, Mohammad [1] Kolios, Athanasios John 0000-0001-6711-641X [2] Amirafshari, Peyman 0000-0001-5394-9648 [1] Wang, Lin (Corresponding author) [3]

Affiliations

  1. [1] University of Strathclyde
    2. [NORA names: United Kingdom; Europe, Non-EU; OECD];
  2. [2] Technical University of Denmark
    3. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] University of Nottingham
    4. [NORA names: United Kingdom; Europe, Non-EU; OECD]

Abstract

A new approach that links finite element analysis (FEA) and a genetic algorithm (GA) with Monte Carlo simulation (MCS) for the reliability-constrained optimal design of offshore wind turbine (OWT) support structure is presented. This approach has been applied to optimise the NREL 5MW OWT on OC3 support structure. The objective function minimises the weight of the support structure, constrained to design and performance limits, by attaining the desired reliability level. A response analysis of the reference OWT is performed to estimate design loads. Then, deterministic optimisation (DO) is carried out to find the candidate design solutions. After that, a reliability assessment is conducted to apply the target reliability constraint. This study reveals that the design of a monopile support structure is mainly driven by fatigue limit state. Also, there is no guarantee that DO candidate designs always meet the structural reliability target level in all capacities.

Keywords

Carlo simulations, Monte, Monte Carlo simulations, NREL, NREL 5MW offshore wind turbines, OC3, algorithm, analysis, assessment, candidate designs, capacity, constraints, design, design loads, design of offshore wind turbines, design solutions, deterministic optimisation, elemental analysis, estimate design loads, fatigue, fatigue limit state, finite element analysis, function, genetic algorithm, levels, limit state, limitations, load, monopile support structure, objective function, offshore wind turbine support structures, offshore wind turbines, optimisation, performance, performance limits, reference, reliability, reliability assessment, reliability constraints, reliability level, response, response analysis, simulation, solution, state, structure, study, support, support structure, target, target level, target reliability constraint, turbine, turbine support structures, weight, wind turbine support structures, wind turbines

Data Provider: Digital Science

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