Structural topology optimization of the transition piece for an offshore wind turbine with jacket foundation

Lee, Yeon Seung; González, José Luís Galán; Lee, Ji Hyun; Kim, Young Il; Park, K. C.; Han, Soonhung

doi:10.1016/j.renene.2015.07.052

Cited by 36 publications

(11 citation statements)

References 21 publications

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“…The EADS (European Aeronautic Defence and Space Company) Innovation Works and EOS (a German SLM systems and service supplier) cooperated in the manufacture of Airbus A320 and A380 brackets with optimised topology. The results showed an obvious reduction in weight and raw material consumption [12,18,22]. However, the majority of the studies on TO and SLM focused on micro-lattice structured parts.…”

Section: Introductionmentioning

confidence: 98%

A lightweight and support-free design method for selective laser melting

Zhang

Dong

et al. 2016

Int J Adv Manuf Technol

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Topology optimisation is an effective approach to design extreme lightweight components. However, most of the resulted optimum lightweight components usually have complex structures which cannot be produced successfully by traditional manufacturing processes. Selective laser melting is one of the additive manufacturing processes. It shows powerful capacity in the manufacturing of metal components with complex structures. Therefore, the combination of topology optimisation and selective laser melting shows a promising prospect for metal components. However, support structures were usually introduced during the selective laser melting manufacturing process, which resulted to some disadvantages, for example, the support structures are generally difficult to remove from the original components because it is difficult to clamping and machining. Therefore, a design method was proposed in this study, named lightweight and support-free design method, the detailed design process and advantages were presented. In the design process, topology optimisation was applied to realise lightweight design, and support-free design process was developed to meet the support-free requirement. Finally, as a case, a cross-beam component was designed using the proposed method, and the final model was produced successfully using selective laser melting process. The case study result verified that the proposed design method is effective to design lightweight and support-free industrial metal components for SLM process.

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Section: Introductionmentioning

confidence: 98%

A lightweight and support-free design method for selective laser melting

Zhang

Dong

et al. 2016

Int J Adv Manuf Technol

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“…Using the proposed synthesis technique, structures have been made to grow from a simple generic base structure to a complex form along an optimized pathway formed by a series of intermediate steps. Lee et al 16 optimized the transition piece for an offshore wind turbine with jacket foundation by topology optimization method and found that the optimized solution was lighter and extended the fatigue life significantly. Tian et al 17 designed the offshore platform jacket structure using the topology optimization method and obtained an optimal structure with lighter weight and large ultimate carrying capacity ability.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of jack-up offshore platform leg structure

Deng

Tian

Han

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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Jack-up platforms are commonly found in the costal or offshore environment for offshore oil and gas recovering. Pile legs are the main component of jack-up platform, which support the whole platform and suffer from the ocean environment load. Topology optimization method is proposed in this article to find an optimized shape for the leg by maximizing its structural stiffness, with the purpose of providing enough resistance for extreme environment load. The whole design space is chosen as design variables, and the maximum stiffness is selected as the optimum objective, with the volume and displacement constrained. An innovative leg structure is generated with lighter weight. Finally, the static and transient dynamic characteristics of the optimized structure leg are analyzed, compared with the original one. It is found that the optimization results not only produce better material distribution with less mass, but also enhance the stiffness and strength requirements of leg structure under the extreme environment load.

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“…The optimal design was searched for according to tower mass and fabrication complexity. Lee et al [42] studied the structural topology optimisation of the transition piece for an OWT with jacket foundation. Lighter structure was achieved with the structural topology optimisation, demonstrating the topology optimisation can be effective and speeding up the total design cycle.…”

Section: Introductionmentioning

confidence: 99%

Integrated structural optimisation of offshore wind turbine support structures based on finite element analysis and genetic algorithm

2017

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By accounting for almost 25% of the capital cost of an OWT (offshore wind turbine), optimisation of support structures provides an efficient way to reduce the currently high cost of offshore wind energy. In this paper, a structural optimisation model for OWT support structures has been developed based on a coupled parametric FEA (Finite Element Analysis) and GA (Genetic Algorithm), minimising the mass of the support structure under multi-criteria constraints. Contrary to existing optimisation models for OWT support structures, the proposed model is an integrated structural optimisation model, which optimises the components of the support structure (i.e. tower, transition piece, grout and monopile) simultaneously. The outer diameters and section thicknesses along the support structure are chosen as design variables. A set of constraints based on multi-criteria design assessment is applied according to standard requirements, which includes vibration, stress, deformation, buckling, fatigue and design variable constraints. The model has been applied to the NREL (National Renewable Energy Laboratory) 5MW OWT on an OC3 (Offshore Code Comparison Collaboration) monopile. The results of the application of the integrated optimisation methodology show a 19.8% reduction in the global mass of the support structure while satisfying all the design constraints. It is demonstrated that the proposed structural optimisation model is capable of effectively and accurately determining the optimal design of OWT support structures, which significantly improves their design efficiency.

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Structural topology optimization of the transition piece for an offshore wind turbine with jacket foundation

Cited by 36 publications

References 21 publications

A lightweight and support-free design method for selective laser melting

A lightweight and support-free design method for selective laser melting

Topology optimization of jack-up offshore platform leg structure

Integrated structural optimisation of offshore wind turbine support structures based on finite element analysis and genetic algorithm

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